Page 3 CM200/CM300/PM400 Radios Detailed Service Manual 6802966C20-C...
Page 4: Computer Software Copyrights
Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product.
Page 5 DOCUMENT HISTORY The following major changes have been implemented in this manual since the previous edition: Edition Description Date 6802966C20-O Initial Release Oct. 2003 6802966C20-C Remove TX RF Troublshooting flow charts. May. 2009 Update Warranty and Service Support Info.
Page 6 Notes...
Page 7 CM200/CM300/PM400 Radios Detailed Service Manual 6802966C20-C Contents Section 1 Service Maintainability Section 2 Control Head Service Information Section 3 VHF1 High Power (25–45 W) Service Information (136–162 MHz) Section 4 VHF2 Low Power (1–25 W) Service Information (146–174 MHz) Section 5 VHF2 High Power (25–45 W) Service Information (146–174 MHz)
Page 8 Notes...
Page 9 CM200/CM300/PM400 Radios Service Maintainability Issue: May, 2009...
Page 10 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 11: Table Of Contents
2.0 Warranty and Service Support................1-1 2.1 Warranty Period and Return Instructions ............1-1 2.2 After Warranty Period ..................1-1 3.0 Replacement Parts Ordering ................1-2 3.1 Basic Ordering Information................1-2 3.2 Motorola Online ....................1-2 3.3 Mail Orders .....................1-2 3.4 Telephone Orders...................1-2 3.5 Fax Orders......................1-2 3.6 Parts Identification ..................1-3 4.0 Radio Model Information..................1-3...
Page 12 Notes...
Page 13: Safety Information
Product Safety and RF Exposure booklet enclosed with your radio (Motorola Publication part number 68P81095C99) to ensure compliance with RF energy exposure limits. For a list of Motorola-approved antennas, batteries, and other accessories, visit the following web site which lists approved accessories: http://www.motorola.com/governmentandenterprise.
Page 14 Notes...
Page 15: Chapter 1 Introduction
In instances where the product is covered under a “return for replacement” or “return for repair” warranty, a check of the product should be performed prior to shipping the unit back to Motorola. This is to ensure that the product has been correctly programmed or has not been subjected to damage outside the terms of the warranty.
Page 16: Replacement Parts Ordering
Technical Services (MTS). If no part number is assigned, the part is not normally available from Motorola. If the part number is appended with an asterisk, the part is serviceable by Motorola Depot only. If a parts list is not included, this generally means that no user-serviceable parts are available for that kit or assembly.
Page 17: Fax Orders
Radio Model Information Fax Orders Radio Products and Solutions Organization* (United States and Canada) 1-800-622-6210 1-847-576-3023 (United States and Canada) USFGMD (Federal Government Orders) 1-800-526-8641 (For Parts and Equipment Purchase Orders) Parts Identification Radio Products and Solutions Organization* (United States and Canada) 1-800-422-4210 Product Customer Service Radio Products and Solutions Organization (United States and Canada)
Page 18 INTRODUCTION Notes...
Page 19: Chapter 2 Maintenance
Chapter 2 MAINTENANCE Introduction This chapter of the manual describes: • preventive maintenance • safe handling of CMOS devices • repair procedures and techniques Preventive Maintenance The radios do not require a scheduled preventive maintenance program; however, periodic visual inspection and cleaning is recommended. Inspection Check that the external surfaces of the radio are clean, and that all external controls and switches are functional.
Page 20: Safe Handling Of Cmos And Ldmos
When damaged parts are replaced, identical parts should be used. If the identical replacement component is not locally available, check the parts list for the proper Motorola part number and order the component from the nearest Motorola Communications parts center listed in the “Piece Parts”...
Page 21 General Repair Procedures and Techniques Chip Components Use the RLN4062 Hot-Air Repair Station for chip component replacement. Adjust the temperature control to 390 °C (735 °F), and adjust the airflow to a minimum setting. Airflow can vary due to component density. •...
Page 22 MAINTENANCE Shields Removing and replacing shields is recommended to be done with the Air Blower, BOSCH GHG 603 or equivalent. • To remove the shield: Place the circuit board in the circuit board holder. Add solder paste flux around the base of the shield. Position the heat-focus head onto the shield.
Page 23: Notes For All Schematics And Circuit Boards
1. Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. Transmitter measurements should be made with a 1.2 µH choke in series with the voltage probe to prevent circuit loading.
Page 24 MAINTENANCE MIC_PTT_CH Microphone PTT Input MOD_IN Modulation Signal from ASFIC MOD_OUT Modulation Signal to the Synthesizer ONOFF_SENSE On off sense switch OPT_DATA_R_OPRD DATA/Ready Request from Option Board OPT_EN_OPBD Option Board Chip Select PA_BIAS PA Control bias voltage PA_CURRENT Not used POST_LIMITER_TX Flat TX Input from Option Board AUDIO_RETURN_OPT_BRD...
Page 25 Notes For All Schematics and Circuit Boards VS AUDIO_SEL Switch signal to Enable option board audio output signal VS GAIN_SEL Voice Storage Gain Select line VS_MIC Voice Storage Audio Signal to microphone path VS_INT Voice Storage Interrupt line VS_RAC Voice storage Row Address Clock Signal VSTBY 3.3 V supply for µP when the radio is switched off...
Page 26 MAINTENANCE Notes...
Page 27: Chapter 3 Service Aids
Table 3-1 lists the service aids recommended for working on the radio. While all of these items are available from Motorola, most are standard workshop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.
Page 28: Test Equipment
SERVICE AIDS Test Equipment Table 3-2 lists test equipment required to service the radio and other two-way radios. Table 3-2 Recommended Test Equipment Motorola Part No. Description Characteristics Application R2000, R2600, Service Monitor This monitor will Frequency/deviation meter and R2400, or R2001...
Page 29 CM200/CM300/PM400 Radios Control Head Service Information Issue: May, 2009...
Page 30 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 31 Table of Contents Chapter 1 OVERVIEW 1.0 CM200 Model.......................1-1 2.0 CM300/PM400 Models ..................1-1 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 Control Head Model for CM200 ................2-1 2.1 Power Supplies....................2-1 2.2 SPI Interface....................2-1 2.3 Keypad Keys ....................2-2 2.4 Status LED’s and Back Light Circuit...............2-2 2.5 Microphone Connector Signals ..............2-2 2.6 Speaker ......................2-3 2.7 Electrostatic Transient Protection..............2-3...
Page 32 Chapter 4 CONTROL HEAD PCB / SCHEMATICS / PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards ............4-1 2.0 Control Head CM200 – PCB 8488998U01 / Schematics ........4-3 2.1 Control Head PCB 8488998U01 Parts List ............ 4-5 3.0 Control Head CM300/PM400 – PCB 8489714U01 / Schematics ......4-6 3.1 Control Head PCB 8489714U01 Parts List ............
Page 33: Chapter 1 Overview
Chapter 1 OVERVIEW CM200 Model The control head contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio, three indicator Light Emitting Diodes (LED) to inform the user about the radio status, and a single character 7-segment display for numeric information e.g. channel number.
Page 34 OVERVIEW Notes...
Page 35: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the Control head circuits. For details of the trouble shooting refer to the related chapter in this section. Control Head Model for CM200 The head contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio and three indicator Light Emitting Diodes (LED) to inform the user about the radio status and a 7-segment display for numeric information.
Page 36: Keypad Keys
THEORY OF OPERATION When the host radio needs to send date to the shift register, the radio asserts the shift register chip select and the data is loaded to the shift register. For example, the host radio sends data to change display channel or change LED status.
Page 37: Speaker
Control Head Model for CM200 If the BOOT_RES (J802-7) line is connected to >5V (e.g. 9.3V) at turn-on, the uP will start in boot mode instead of normal operation. This mode is used to programme new firmware into the FLASH memory (U404 mainboard).
Page 38: Control Head Model For Cm300/Pm400
THEORY OF OPERATION Control Head Model for CM300/PM400 The control head contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio, three indicator Light Emitting Diodes (LED) to inform the user about the radio status, and an 8 character Liquid Crystal Display (LCD) for alpha-numerical information e.g.
Page 39: Keypad Keys
Control Head Model for CM300/PM400 Keypad Keys The control head keypad is a four-key design. All keys are configured as two analog lines read by µP. The voltage on the analog lines varies between 0V and 3.3 V depending on which key is pressed.
Page 40: Speaker
THEORY OF OPERATION The HOOK line (J102-6) is used to inform the uP which type of microphone or SCI lead is connected to the microphone socket. The voltage of the HOOK line is monitored by the uP (port PE0, MIC_SENSE) through a resistor divider on the main board. When the HOOK line is grounded (on hook condition) or floating (2.8V nominal), the uP sets the mux (U8) for keypad operation to allow the use of microphones with a keypad.
Page 41: Control Head Cm200 Troubleshooting Chart
Chapter 3 TROUBLESHOOTING CHARTS Control Head CM200 Troubleshooting Chart Control Head Failure Control Head Check Check 9.3V on Back light R808, R809 OK ? Check Speaker Power-up Alert Tone Connection OK ? Power-up Check Red LED D801, Q806, U801 Flash? Channel Check Display...
Page 42: Button/Tones Select Error
TROUBLESHOOTING CHARTS Button/Tones Select Error (Page 1 of 2) Button/Tones Check Check Voltage Levels on TP401 (Keypad Col) and TP402 (Keypad Row) (see table on next page) Right Voltage Check R846, R811 Up Key on Control Head Right Voltage Check R845, R810 on Down Key on Control Head Right...
Page 43 Control Head CM200 Troubleshooting Chart Button/Tones Select Error (Page 2 of 2) Right Does Q812 Voltage on Control Head Replace on DTMF keys operates well Q812 Button/Tones Keys Replace U803 Okay on Control Head Key_Col Key_Column Voltage TP401 Voltage (TP401) 0.008 V 0.675 V 1.346 V...
Page 44: Control Head Cm300/Pm400 Troubleshooting Chart
TROUBLESHOOTING CHARTS Control Head CM300/PM400 Troubleshooting Chart Control Head Failure Control Head Check Check 9.3V on Back light Q12, U1 and associated OK ? parts and U8 Power-up Check Speaker Alert Tone Connection OK ? Indicator Check LED’ Q8–Q10, U8 and 9.3V OK ? Display Check LCD...
Page 45: Button/Tones Select Error
Control Head CM300/PM400 Troubleshooting Chart Button/Tones Select Error (Page 1 of 2) Button/Tones Check Check Voltage Levels on TP401 (Keypad Col) and TP402 (Keypad Row) (see table on next page) Right Check R13, R45 Voltage on Control Head Up Key? Right Check R12, R49 Voltage...
Page 46 TROUBLESHOOTING CHARTS Button/Tones Select Error (Page 2 of 2) Right Does Q41 Voltage on Control Head Replace on DTMF keys operates well Button/Tones Keys Replace U8 Okay on Control Head Key_Col Key_Column Voltage TP401 Voltage (TP401) 0.008 V 0.675 V 1.346 V 1.997 V 2.650 V...
Page 47 Chapter 4 CONTROL HEAD PCB / SCHEMATICS / PARTS LISTS Allocation of Schematics and Circuit Boards Table 4-1 Control Head Diagrams and Parts Lists PCB : Control Head CM200 Page 4-3 8488998U01 Main Board Top Side Page 4-3 8488998U01 Main Board Bottom Side SCHEMATICS Sheet 1 of 1 Page 4-4...
Page 48 CONTROL HEAD PCB / SCHEMATICS / PARTS LISTS Notes...
Page 49 Control Head CM200 – PCB 8488998U01 / Schematics Control Head CM200 – PCB 8488998U01 / Schematics D801 D802 D803 J804 DS801 D806 J805 J802 S802 S801 Top Side SHOWN FROM SIDE 1 8488998u01_p3 Bottom Side Q811 Q804 Q805 Q806 R843 C827 J803 C826...
Page 50 Control Head CM200 – PCB 8488998U01 / Schematics D3_3V R842 R847 C824 C825 M801 10.K 10.K 220.p 100n THESE ARE THE M802 ESD PROTECTION D3_3V M803 CONTACTS (SPRINGS) M804 9_3V C826 C827 R829 R843 DS801 9_3V D3_3V HDSP-513G R821 220.p 100n 10.K 10.K...
Page 51 Control Head CM200 – PCB 8488998U01 / Schematics Control Head PCB 8488998U01 Parts Circuit Motorola Circuit Motorola Description Description List Part No Part No Circuit Motorola M801 7588823L03 PAD GROUNFD LCD R830 0662057A41 CHIP RES 470 OHMS 5% Description Part No...
Page 52 Control Head CM300/PM400 – PCB 8489714U01 / Schematics Control Head CM300/PM400 – PCB 8489714U01 / Schematics Top Side C35 C36 J103 Bottom Side P101 Control Head CM300/PM400 PCB 8489714U01...
Page 53 Control Head CM300/PM400 – PCB 8489714U01 / Schematics D3_3V 9_3V COM3 LCD_36PIN COM2 COM1 COM0 5V_IN 9_3V D3_3V CH_PTT D3_3V 5V_IN 5V_CH TELCO_PTT 0.1uF 1000pF 0.1uF 470pF 0.1uF 1000pF 5V_CH 1000pF COM0 220pF 470pF 1000pF MAIN BOARD CONNECTOR COM1 S1D15100 COM2 .022uF J103-14...
Page 54 Control Head CM300/PM400 – PCB 8489714U01 / Schematics Control Head PCB 8489714U01 Parts List Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Part No Part No Part No Circuit Motorola Description Part No NOT PLACED CAP, 220pF 7588823L03 CONTACT...
Page 55 CM300 Radio VHF1 (136–162 MHz) 25–45 W Service Information Issue: May, 2009...
Page 56 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 57 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM300 Model Chart.....................1-1 2.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 VHF (136–162 MHz) Receiver................2-1 2.1 Receiver Front-End..................2-1 2.2 Receiver Back End ..................2-2 3.0 VHF Transmitter Power Amplifier (136–162 MHz)..........2-2 3.1 First Power Controller Stage................2-2 3.2 Power Controlled Driver Stage ..............2-3 3.3 Final Stage....................2-3...
Page 58 8.3 Dual Tone Multiple Frequency (DTMF) Data..........2-18 9.0 Receive Audio Circuits..................2-19 9.1 Squelch Detect ..................2-19 9.2 Audio Processing and Digital Volume Control ........... 2-20 9.3 Audio Amplification Speaker (+) Speaker (-) ..........2-20 9.4 Handset Audio ................... 2-21 9.5 Filtered Audio and Flat Audio ..............
Page 59 VHF 1 (136–162 MHz) 25–45 W Microprocessor and Controller Circuits (Sht 2 of 2) ......................4-17 VHF 1 (136–162 MHz) 25–45 W Power Control Circuit ........4-18 2.1 VHF 1 PCB 8486487Z03 Parts List 25–45 W..........4-19...
Page 60 Notes...
Page 61: Chapter 1 Model Chart And Technical Specifications
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS CM300 Model Chart VHF1, 25–45 W, 136–162 MHz Model Description AAM50JQF9AA1AN CM300 136–162 MHz, 25–45 W, 32 CH Item Description PMUD1946_ CM300 Super Tanapa VHF1, 25–45 W, 32 CH PMUD1962_ CM300 Tanapa VHF1, 25–45 W, 32 CH PMLN4599_ Control Head PMUD1962_S...
Page 62: Technical Specifications
MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification VHF1 Frequency Range: 136–162 MHz Frequency Stability ±2.5 PPM (-30°C to +60°C, 25°C Ref.) Channel Capacity: CM300 – 32 Channels Channel Spacing: 12.5/20/25 kHz Power Supply: 13.8 Vdc (11 Vdc –...
Page 63 Technical Specifications Transmitter Specification VHF1 Power Output 25–45 W Conducted/Radiated -26 dBm Emissions: Audio Response: (from 6 dB/oct. Pre-Emphasis, TIA603 and CEPT 300 to 3000 Hz) Tx Audio Distortion < 3% Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 25 kHz FM Hum and Noise: -40 dB@12.5 kHz...
Page 64 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes...
Page 65: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual.
Page 66: Receiver Back End
THEORY OF OPERATION Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz.
Page 67: Power Controlled Driver Stage
VHF Transmitter Power Amplifier (136–162 MHz) Op-amp U103-3 monitors the drain current of U101 via resistors R122 & R197 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101.
Page 68: Harmonic Filter
THEORY OF OPERATION Harmonic Filter Inductors L111, L112, L124 and L113 along with capacitors C1132, C1022, C1020, C1137, C1018, and C1017 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 drains any electrostatic charges that might otherwise build up on the antenna. The harmonic filter also prevents high level RF signals above the receiver passband from reaching the receiver circuits to improve spurious response rejection.
Page 69: Fractional-N Synthesizer
VHF (136–162 MHz) Frequency Synthesis This oscillator is temperature compensated to an accuracy of +/-2.5 PPM from -30 to 60 degrees C. The temperature compensation scheme is implemented by an algorithm that uses five crystal parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C).
Page 70: Voltage Controlled Oscillator (Vco)
THEORY OF OPERATION Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX amplifier, and the modulation circuitry. AUX3 (U200 Pin 2) U200 Pin 32 Prescaler Out TRB IN Pin 20...
Page 71: Synthesizer Operation
VHF (136–162 MHz) Frequency Synthesis Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.
Page 72: Controller Theory Of Operation
THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
Page 73 Controller Theory of Operation The DC voltage applied to connector P2 supplies power directly to the following circuitry: • Electronic on/off control • RF power amplifier • 12 volts P-cH FET – U514 • 9.3 volt regulator • Audio PA Ignition Control Head RF_PA...
Page 74: Protection Devices
2-10 THEORY OF OPERATION Voltage regulator U503 provides 5 V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. Protection Devices Diode VR500 acts as protection against ESD, wrong polarity of the supply voltage, and load dump. VR692 –...
Page 75: Microprocessor Clock Synthesiser
Controller Theory of Operation 2-11 While the radio is switched on, the µP monitors the voltage at the emergency input on the accessory connector via U403-pin 62. Three different conditions are distinguished: no emergency kit is connected, emergency kit connected (unpressed), and emergency press. If no emergency switch is connected or the connection to the emergency switch is broken, the resistive divider R5030 / R5049 will set the voltage to about 3.14 volts (indicates no emergency kit found via EMERGENCY_SENSE line).
Page 76: Serial Peripheral Interface (Spi)
2-12 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.
Page 77: Normal Microprocessor Operation
Controller Theory of Operation 2-13 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory.
Page 78: Static Random Access Memory (Sram)
2-14 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles.
Page 79: Transmit Audio Circuits
Transmit Audio Circuits 2-15 Transmit Audio Circuits 24kOhms TX SND TX RTN U509 CONTROL HEAD FILTERS AND CONNECTOR PREEMPHASIS ASFIC_CMP GCB3 U504 LIMITER HS SUMMER EXT MIC U509 SPLATTER FLAT TX FILTER AUDIO MOD IN ACCESSORY LS SUMMER CONNECTOR SECTION GCB5 (SYNTHESIZER) ATTENUATOR...
Page 80: Ptt Sensing And Tx Audio Processing
2-16 THEORY OF OPERATION 7.1.2 Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3 V is routed to R429 via R458, D401, and it create 0.7 V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430.
Page 81: Transmit Signalling Circuits
Transmit Signalling Circuits 2-17 Transmit Signalling Circuits SUMMER HIGH SPEED 5-3-2 STATE ENCODER CLOCK IN SPLATTER (HSIO) FILTER DTMF MICRO ENCODER CONTROLLER U403 ASFIC_CMP U504 LOW SPEED ENCODER SUMMER CLOCK IN (LSIO) TO RF ATTENUATOR SECTION MOD IN (SYNTHESIZER) Figure 2-8 Transmit Signalling Path From a hardware point of view, there are 3 types of signaling: •...
Page 82: High Speed Data
2-18 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings.
Page 83: Receive Audio Circuits
Receive Audio Circuits 2-19 Receive Audio Circuits ACCESSORY CONNECTOR FLT RX AUDIO AUDIO SPKR + EXTERNAL SPKR - U502 SPEAKER SPKR+ SPKR- CONTROL HEAD CONNECTOR MUTE U509 INTERNAL SPEAKER HANDSET AUDIO U505 U IO GCB4 URX OUT AUDIO GCB1 AUX RX VOLUME ASFIC_CMP ATTEN.
Page 84: Audio Processing And Digital Volume Control
2-20 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2. The signal is then applied to both the audio and the PL/DPL paths.
Page 85: Handset Audio
Receive Signalling Circuits 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified.
Page 86: Alert Tone Circuits
2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle.
Page 87: Chapter 3 Troubleshooting Charts
Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.
Page 88: Troubleshooting Flow Chart For Receiver Rf (Sheet 1 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) START Problem (Either 12.5K or 25K channel spacing having problem) in 12.5 KHz and 25 KHz channel spacing 9V on Check Go to Go to R310 (LNA) to U301 RX_EN DC Section DC Section...
Page 89: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)
Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) From Check visually all receiver Go to (IFIC -Vcc) components DC Section OK ? installation ? Inject - 40dBm (CW) Check to RF connector Installation the component...
Page 90: Troubleshooting Flow Chart For 45 W Transmitter (Sheet 1 Of 3)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 45 W Transmitter (Sheet 1 of 3) START No or too low power when keyed Check components between >4A Current >1A & <4A Q100 and RF output, increase when Antenna Switch D104, keyed? D103, VR102 and Q106 <1A Control Check PA...
Page 91: Troubleshooting Flow Chart For 45 W Transmitter (Sheet 2 Of 3)
Troubleshooting Flow Chart for 45 W Transmitter (Sheet 1 of 3) Troubleshooting Flow Chart for 45 W Transmitter (Sheet 2 of 3) Check PA Stages No or too low power when keyed Voltage Check U510 at Q101 Check Q101, R122, base=0? R197, R153, R136, R165, R168,...
Page 92: Troubleshooting Flow Chart For 45 W Transmitter (Sheet 3 Of 3)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 45 W Transmitter (Sheet 3 of 3 Check Final PA Stage Check components Supply Voltage PA_Bias between ASFIC & Replace Q100 Voltage at Q100 before re- R134 placing Q100 1–4Vdc RF Voltage after C1044 >100mV? RF Voltage Check FGU...
Page 93: Troubleshooting Flow Chart For Synthesizer
Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer 3V at Check 3V U200 pins 5, Start Regulator 20, 34 & 36 U508 Visual Correct check of the Problem Board OK? Is 16.8MHz 16.8MHz Replace Signal at signal at U200 Is U200 U200 Pin 19?
Page 94: Troubleshooting Flow Chart For Vco
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP1 Visual check Visual check Correct of board of board Problem Make sure U508 is working correctly and runner 3.3 DC at U201 3.3V DC at U201...
Page 95: Troubleshooting Flow Chart For Dc Supply (1 Of 2)
Troubleshooting Flow Chart for DC Supply (1 of 2) Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope.
Page 96: Troubleshooting Flow Chart For Dc Supply (2 Of 2)
3-10 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Check Voltage on V=3.3V C5041 Replace U510 Go to Start 9v<V<9.8v...
Page 97: Allocation Of Schematics And Circuit Boards
Chapter 4 VHF1 PCB / SCHEMATICS / PARTS LISTS Allocation of Schematics and Circuit Boards VHF1 and Controller Circuits The VHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for both the VHF circuits and the Controller circuits. The PCB component layouts and the Parts Lists in this Chapter show both the Controller and VHF circuit components.
Page 98 VHF1 PCB / SCHEMATICS / PARTS LISTS Notes...
Page 99: Vhf 25-45 W Band 1 Pcb 8486487Z03 / Schematics
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics FILT_SW_B+ INTEGRATOR DET_VRVS FILT_SW_B+ DET-VFWD V_CTRL_DRIVER TX_EN PWR_SET RX_EN TX_EN PA_BIAS PWR_SET RX_EN V_CTRL_DRIVER INTEGRATOR PA_BIAS COMP_B+ DET_VRVS TX_INJ DET_VFWD TX_INJ VHF 1 Interconnection between Main Board and Power Amplifier Compartment...
Page 100: Vhf 1 (136-162 Mhz) 25-45 W 8486487Z03, Top Side View
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics R101 R5087 C1064 C1096 C1007 C1097 C5100 C1065 L122 VR693 C1113 C1099 C1008 C1009 C1088 C1001 R102 C1115 VR501 VR500 C1114 R190 R179 R199 C1063 R5082 R5081 C5096 R191 M102 C1098 C1033 R5083 R178...
Page 101: Vhf 1 (136-162 Mhz) 25-45 W 8486487Z03, Bottom Side View
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics R113 C5000 R169 R111 C1055 C1109 R114 R127 C5086 C1061 R115 R126 D402 VR692 R116 C1110 C1002 C1035 R404 R403 R147 TP103 R175 C5083 VR503 D100 R405 TP102 M111 TP108 L500 R5049 R421 C5055...
Page 102: Vhf 1 (136-162 Mhz) 25-45 W Main Circuit (Sht 1 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics TX_EN SPI_CLK SPI_MOSI RSSI SYNTH_CS FILT_SW_B+ D3_3V SYNTH_LOCK RX_EN FILT_SW_B+ D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO LOC_DIST RX_EN (SOURCE ) D3_3 V (SOURCE) (SOURCE) (SOURCE) LOC_DIST D3_3V RSSI SPI_MOSI SYNTH_CS SPI_CLK SYNTH_LOCK ASFIC_CS ASFIC_CS DIGITAL...
Page 103: Vhf 1 (136-162 Mhz) 25-45 W Main Circuit (Sht 2 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics TX_EN SPI_CLK SPI_MOSI RSSI SYNTH_CS SYNTH_LOCK RX_EN TX_EN LOC_DIST RX_EN (SOURCE) COMP_B+ FILT_SW_B+ PWR_SET V_CTRL_DRIVER FILT_SW_B+ COMP_B+ PA_BIAS PA_BIAS TX_INJ PWR_SET FILT_SW_B+ V_CTRL_DRIVER FILT_SW_B+ DET_VFWD INTEGRATOR INTEGRATOR DET_VRVS POWER_CONTROL DET_VRVS DET-VFWD TX_INJ DC &...
Page 104: Vhf 1 (136-162 Mhz) 25-45 W Transmitter (Sht 1 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics PA_FILT_B+ (SOURCE) L100 35U02 C1089 C1107 C1103 C1000 C1112 C1110 C1109 C1106 R186 1000pF 220pF 220pF 220pF 220pF 470pF 470pF .033uF R137 C1027 10uF PA_FILT_B+ C1053 1000pF FILT_SW_B+_PA C1040 R138 C1072 FLT_9V VCNTR3 VCNTR3...
Page 105: Vhf 1 (136-162 Mhz) 25-45 W Transmitter (Sht 2 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics R132 100K U102-2 TP108 LM2904 IF109 R111 R114 L119 35U02 R177 COMP_B+ Final_cur_sense C1115 C1099 C1100 C1116 TP113 100 NU FILT_SW_B+_PA C1055 IF110 R113 D107 220pF 1000pF 1000pF 220pF C1056 1000pF C1073 IF112 1000pF...
Page 106: Vhf 1 (136-162 Mhz) 25-45 W Synthesiser And Vco (Sht 1 Of 2)
4-10 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics LVFRACN Shield L217 390nH C2026 R225 C2000 C2034 C201 5 2.2uF 0.1u F 1000pF .01uF C2025 C2055 R228 22pF .01uF D200 C2016 C2004 L200 R226 0.1uF 2.2uF C2024 390nH .01uF C2005 C2023 C2035...
Page 107: Vhf 1 (136-162 Mhz) 25-45 W Synthesiser And Vco (Sht 2 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-11 V_SF VCOBIC Shield SH202 L201 R231 SHIELD 680nH C2007 C2009 C2038 C2008 C2042 C2041 C2040 0.1uF C2011 1000pF 0.1uF 1000pF 0.1uF 1000pF 1000pF R235 0.1uF R220 L209 100nH L208 C2010 C2039 100nH 0.1uF...
Page 108: Vhf 1 (136-162 Mhz) 25-45 W Receiver Front And Back End (Sht 1 Of 2)
4-12 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics FRONT-END SHIELD Q304 Q306 R333 C321 R346 LOC_DIST .01uF L302 R300 R310 1.2uH C330 R345 SH301 R335 C324 470pF Q300 SHIELD Q301 1000pF RX_EN C329 R339 L303 1.2uH D305 470pF R327 C331 2.4K...
Page 109: Vhf 1 (136-162 Mhz) 25-45 W Receiver Front And Back End (Sht 2 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-13 U301-1 TC7W04F FL301 R306 R315 FLTR C313 OU T 0.1uF U301-2 TC7W04F BW_SEL D302 D301 R305 FL302 R316 C312 20 K FLTR 0.1uF R314 R324 R326 3.3K 2.4K Check if it is 3v or another value C316 0.1uF U301-4...
Page 110: Vhf 1 (136-162 Mhz) 25-45 W Dc And Audio Circuits (Sht 1 Of 2)
4-14 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics IF501 COMP_B+ IF503 L120 POWER SUPPLY C1113 C1098 spacer for TO-22 0 C1097 C1088 C1114 SOURCE 35U02 AUDIO POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BR 1000pF 220pF 220pF 1000pF 1000pF U501 SOURCE LM2941T IF502 FILT_B + 9.3V 9.3V FLAT_TX_AUDIO_INPUT_ACCESS_CONN...
Page 111: Vhf 1 (136-162 Mhz) 25-45 W Dc And Audio Circuits (Sht 2 Of 2)
VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-15 C5089 C5090 C5056 82pF R5024 R5068 82pF R5022 POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD 100K 6.2K 4.7uF C5101 R5046 100K R5056 U506-2 1000pF LM2904 R5045 C5081 C5033 C5055 R5023 FLAT_TX_AUDIO_INPUT_ACCESS_CONN 1000pF 0.1uF 100K C5032 4.7uF U506-1 R5025 0.1uF...
Page 112: Vhf 1 (136-162 Mhz) 25-45 W Microprocessor And Controller Circuits (Sht 1 Of 2)
4-16 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics D3_3V R462 SCI_CH TP410 TEST_POINT SPI_MISO C410 R451 R439 TEST_POINT R450 TP406 LSIO 0.1uF SPI_MOSI CH_ACT SPI_CLK SQ_DET ASFIC_CS TP404 HSI O TEST_POINT Q407 Q400 SYNTH_CS OPT_DATA_R_OPBD DISPLAY_CS_CH D3_3V uP_CLK SHIFT_R_CS D3_3V SPI_MISO...
Page 113 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-17 D3_3V FILT_SW_B+ Q403 R401 R460 PROG_OUT-ALARM_4 R444 2.7K 1.5K TP405 TEST_POINT Q401 R431 Q415 BOOT_EN_IN_CH D3_3V VR400 D3_3V C490 R459 6.8V R445 R436 R457 3.3K ACCESS_PTT D3_3V Q414 Q412 D3_3V R458 3.3K R422...
Page 114 4-18 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics U100-1 LM2904 L101 R141 C1046 IF701 1000pF DET_VFWD C1071 C1075 C1045 1000pF 1000pF 1000pF FILT_SW_B+ R117 IF702 R140 INTEGRATOR C1082 R144 R164 1000pF C1049 6.2K C1048 1000pF R146 1000pF IF700 L102 DET_VRVS C1076...
Page 115 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-19 VHF 1 PCB 8486487Z03 Circuit Motorola Circuit Motorola Circuit Motorola Parts List 25–45 W Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Circuit Motorola C330 2113740F67...
Page 116 4-20 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1000 2113740F59 CAP, 220pF C1035 2113743E07 CAP, .022uF...
Page 117 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1128 2113740F59 CAP, 220pF C2021 2113741F49 CAP, .01uF...
Page 118 4-22 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C5033 2113743K15 CAP, 0.1uF C5063 2113741M69 CAP, 0.1uF...
Page 119 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-23 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. D511 4813833C02 MMBD6100, DUAL L117 7686135U02...
Page 120 4-24 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. Q415 NOT PLACED MMBT3904 R118 0662057C55...
Page 121 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-25 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R220 0662057A42 RES, 510 R314 0662057A75...
Page 122 4-26 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R610 0662057C59 RES, 220 R5037 0662057A73...
Page 123 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics 4-27 Circuit Motorola Circuit Motorola Description Description Ref. Part No. Ref. Part No. U405 5113805A75 MC74HC595A, SHIFT VR502 NOT PLACED MMSZ4686T1, 3.9V ZENER U500 5180932W01 LM2904, OPAMP VR503 4813830G09 MMSZ4684, 3.3V ZENER...
Page 124 4-28 VHF 25–45 W Band 1 PCB 8486487Z03 / Schematics Notes...
Page 125 CM200/CM300/PM400 Radios VHF2 (146–174 MHz) 1–25 W Service Information Issue: May, 2009...
Page 126 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 127 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM200/CM300/PM400 Model Chart..............1-1 2.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 VHF (146–174 MHz) Receiver................2-1 2.1 Receiver Front-End..................2-1 2.2 Receiver Back End ..................2-2 3.0 VHF Transmitter Power Amplifier (146–174 MHz)..........2-2 3.1 First Power Controller Stage................2-2 3.2 Power Controlled Driver Stage ..............2-3 3.3 Final Stage....................2-3...
Page 128 8.3 Dual Tone Multiple Frequency (DTMF) Data..........2-18 9.0 Receive Audio Circuits..................2-19 9.1 Squelch Detect ..................2-19 9.2 Audio Processing and Digital Volume Control ........... 2-20 9.3 Audio Amplification Speaker (+) Speaker (-) ..........2-20 9.4 Handset Audio ................... 2-21 9.5 Filtered Audio and Flat Audio ..............
Page 129 VHF2 (146–174 MHz) 1–25 W 8486672Z01, Top Side ........4-30 VHF2 (146–174 MHz) 1–25W 8486672Z01, Bottom Side ........4-31 VHF2 (146–174 MHz) 1–25 W Main Circuit (Sht 1 of 2) ........4-32 VHF2 (146–174 MHz) 1–25 W Main Circuit (Sht 2 of 2) ........4-33 VHF2 (146–174 MHz) 1–25 W Transmitter (Sht 1 of 2) ........4-34 VHF2 (146–174 MHz) 1–25 W Transmitter (Sht 2 of 2)........4-35 VHF2 (146–174 MHz) 1–25 W Synthesiser and VCO (Sht 1 of 2) ....4-36...
Page 130 Notes...
Page 131: Chapter 1 Model Chart And Technical Specifications
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS CM200/CM300/PM400 Model Chart VHF2, 1–25 W, 146–174 MHz Model Description AAM50KNC9AA1AN CM200 146–174 MHz, 1–25 W, 4 CH AAM50KNF9AA1AN CM300 146–174 MHz, 1–25 W, 32 CH AAM50KNF9AA3AN PM400 146–174 MHz, 1–25 W, 64 CH Item Description PMUD1871_...
Page 132: Technical Specifications
MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification VHF2 Frequency Range: 146–174 MHz Frequency Stability ±2.5 PPM (-30°C to +60°C, 25°C Ref.) Channel Capacity: CM200 – 4 CM300 – 32 PM400 – 64 Channel Spacing: 12.5/20/25 kHz Power Supply:...
Page 133 Technical Specifications Transmitter Specification VHF2 Power Output 1–25W Conducted/Radiated -36 dBm < 1 GHz Emissions: -30 dBm > 1 GHz Audio Response: (from 6 dB/oct. Pre-Emphasis, TIA603 and CEPT 300 to 3000 Hz) Tx Audio Distortion < 3% Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 25 kHz...
Page 134 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes...
Page 135: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual.
Page 136: Receiver Back End
THEORY OF OPERATION Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz.
Page 137: Power Controlled Driver Stage
VHF Transmitter Power Amplifier (146–174 MHz) Op-amp U103-3 monitors the drain current of U101 via resistor R122 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101.
Page 138: Harmonic Filter
THEORY OF OPERATION Harmonic Filter Inductors L111, L112 and L113 along with capacitors C1011, C1024, C1025, C1022, C1020, C1016, C1017 and C1026 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 along with L126 drains any electrostatic charges that might otherwise build up on the antenna.
Page 139: Fractional-N Synthesizer
VHF (146–174 MHz) Frequency Synthesis This oscillator is temperature compensated to an accuracy of +/-2.5 PPM from -30 to 60 degrees C. The temperature compensation scheme is implemented by an algorithm that uses five crystal parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C).
Page 140: Voltage Controlled Oscillator (Vco)
THEORY OF OPERATION Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX amplifier, and the modulation circuitry. AUX3 (U200 Pin 2) U200 Pin 32 Prescaler Out TRB IN Pin 20...
Page 141: Synthesizer Operation
VHF (146–174 MHz) Frequency Synthesis Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.
Page 142: Controller Theory Of Operation
THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
Page 143 Controller Theory of Operation The DC voltage applied to connector P2 supplies power directly to the following circuitry: • Electronic on/off control • RF power amplifier • 12 volts P-cH FET –U514 • 9.3 volt regulator • Audio PA Ignition Control Head RF_PA Audio_PA...
Page 144: Protection Devices
2-10 THEORY OF OPERATION Voltage regulator U503 provides 5 V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. Protection Devices Diode VR500 acts as protection against ESD, wrong polarity of the supply voltage, and load dump. VR692 –...
Page 145: Microprocessor Clock Synthesiser
Controller Theory of Operation 2-11 While the radio is switched on, the µP monitors the voltage at the emergency input on the accessory connector via U403-pin 62. Three different conditions are distinguished: no emergency kit is connected, emergency kit connected (unpressed), and emergency press. If no emergency switch is connected or the connection to the emergency switch is broken, the resistive divider R5030 / R5049 will set the voltage to about 3.14 volts (indicates no emergency kit found via EMERGENCY_SENSE line).
Page 146: Serial Peripheral Interface (Spi)
2-12 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.
Page 147: Normal Microprocessor Operation
Controller Theory of Operation 2-13 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory.
Page 148: Static Random Access Memory (Sram)
2-14 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles.
Page 149: Transmit Audio Circuits
Transmit Audio Circuits 2-15 Transmit Audio Circuits 24kOhms TX SND TX RTN U509 CONTROL HEAD FILTERS AND CONNECTOR PREEMPHASIS ASFIC_CMP GCB3 U504 LIMITER HS SUMMER EXT MIC U509 SPLATTER FLAT TX FILTER AUDIO MOD IN ACCESSORY LS SUMMER CONNECTOR SECTION GCB5 (SYNTHESIZER) ATTENUATOR...
Page 150: Ptt Sensing And Tx Audio Processing
2-16 THEORY OF OPERATION 7.1.2 Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3 V is routed to R429 via R458, D401, and it create 0.7 V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430.
Page 151: Transmit Signalling Circuits
Transmit Signalling Circuits 2-17 Transmit Signalling Circuits SUMMER HIGH SPEED 5-3-2 STATE ENCODER CLOCK IN SPLATTER (HSIO) FILTER DTMF MICRO ENCODER CONTROLLER U403 ASFIC_CMP U504 LOW SPEED ENCODER SUMMER CLOCK IN (LSIO) TO RF ATTENUATOR SECTION MOD IN (SYNTHESIZER) Figure 2-8 Transmit Signalling Path From a hardware point of view, there are 3 types of signaling: •...
Page 152: High Speed Data
2-18 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings.
Page 153: Receive Audio Circuits
Receive Audio Circuits 2-19 Receive Audio Circuits ACCESSORY CONNECTOR FLT RX AUDIO AUDIO SPKR + EXTERNAL SPKR - U502 SPEAKER SPKR+ SPKR- CONTROL HEAD CONNECTOR MUTE U509 INTERNAL SPEAKER HANDSET AUDIO U505 U IO GCB4 URX OUT AUDIO GCB1 AUX RX VOLUME ASFIC_CMP ATTEN.
Page 154: Audio Processing And Digital Volume Control
2-20 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2. The signal is then applied to both the audio and the PL/DPL paths The audio path has a programmable amplifier, whose setting is based on the channel bandwidth being received, an LPF filter to remove any frequency components above 3000 Hz, and a HPF to...
Page 155: Handset Audio
Receive Signalling Circuits 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified.
Page 156: Alert Tone Circuits
2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle.
Page 157: Chapter 3 Troubleshooting Charts
Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.
Page 158: Troubleshooting Flow Chart For Receiver Rf (Sheet 1 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) START Problem in 12 KHz and 25 KHz channel spacing 9V on Check Go to R310 (LNA) to U301 Go to RX_EN DC Section Okay ? DC Section –...
Page 159: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)
Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) From Check visually FE and BE Go to (IFIC Vcc) components DC Section OK ? installation ? Inject 40dBm (CW) Check to RF connector Installation the component...
Page 160: Troubleshooting Flow Chart For Synthesizer
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Synthesizer 5V at Check 5V U200 pins 5, Start Regulator 20, 34 & 36 U503 Visual Correct check of the Problem Board OK? Is 16.8MHz 16.8MHz Replace Signal at signal at U200 Is U200 U200 Pin 19? U200 pin at pin 6 of...
Page 161: Troubleshooting Flow Chart For Vco
Troubleshooting Flow Chart for VCO Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP1 Visual check Visual check Correct of board of board Problem Make sure U508 is working correctly and runner 3.3 DC at U201...
Page 162: Troubleshooting Flow Chart For Dc Supply (1 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope.
Page 163: Troubleshooting Flow Chart For Dc Supply (2 Of 2)
Troubleshooting Flow Chart for DC Supply (1 of 2) Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Check Voltage on V=3.3V C5041 Replace U510 Go to Start 9v<V<9.8v...
Page 164 TROUBLESHOOTING CHARTS Notes...
Page 165: Allocation Of Schematics And Circuit Boards
Chapter 4 VHF2 PCB/ SCHEMATICS/ PARTS LISTS Allocation of Schematics and Circuit Boards VHF2 and Controller Circuits The VHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for both the VHF circuits and the Controller circuits. The PCB component layouts and the Parts Lists in this Chapter show both the Controller and VHF circuit components.
Page 166 VHF2 PCB/ SCHEMATICS/ PARTS LISTS Notes...
Page 167: Vhf 1-25 W Band 2 Pcb 8488977U01 (Rev. P9) / Schematics
VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics VHF 1 25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics – FILT_SW_B+ FILT_SW_B+ COMP_B+ INTEGRATOR INTEGRATOR DET_VRVS DET_VRVS DET-VFWD DET_VFWD TX_EN TX_EN PA Compartment RX_EN RX_EN MAIN PWR_SET PWR_SET PA_CURRENT...
Page 168 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics R101 C1007 C1064 L119 C1097 C5100 L122 C1065 VR693 C1113 C1001 C1008 C1009 C1088 C1099 R107 R108 C1115 R102 R150 VR500 VR501 R106 R105 L120 C1114 C1016 C1017 L126 R179 C1098 C1063...
Page 169 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 8488977u01_p8 R113 C5000 R169 R114 R111 C1055 C5086 R127 C1109 R126 L117 C1061 C1003 U102 D402 VR692 C1002 C1110 R175 R403 R147 R404 C1035 D100 C5083 R421 VR503 M111 R405 C5060 L500...
Page 170 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics D3_3V FILT_SW_B+ FILT_SW_B+ D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS CH_ACT DIGITAL SQ_DET LSIO HSIO F1200 uP_CLK VS_AUDIO_SEL J3 - RESET D3_3V J3-4 J3-17 VOICE STORAGE AUDIO SELECT SERIAL CLOCK J3-12 J3-16...
Page 171 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics TX_EN RX_EN FILT_SW_B+ (SOURCE) (SOURCE) (SOURCE) (SOURCE) (SOURCE) FILT_SW_B+ D3_3V D3_3V FILT_SW_B+ SPI_MOSI COMP_B+ COMP_B+ SPI_CLK ASFIC_CS PA_BIAS PA_BIAS CH_ACT PWR_SET PWR_SET SQ_DET LSIO PA_CURRENT PA_CURRENT HSIO TX_INJ F1200 uP_CLK DET_VFWD FILT_SW_B+...
Page 172 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics PA_FILT_B+ (SOURCE) L100 IF109 1019447 L119 1019447 COMP_B+ IF110 R137 R186 39.K C1115 C1099 C1100 C1116 220.p 220.p C1053 C1000 C1112 C1110 C1109 C1106 C1089 C1107 C1103 FLT_9V 220.p 220.p 220.p 220.p...
Page 173 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics IF100 PA_CURRENT R132 R114 100.K LM2904 10.K U102 R111 Final_cur_sense R177 C1095 R113 220.p 100. 10.K C1055 FILT_SW_B+_PA R101 C1056 C1073 CONTACTS FOR PA CLIP R110 R112 R115 100.K 10.K PLTD_HOLE3_5x7_0_TRIMMED C1058...
Page 174 4-10 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics L217 390nH C2000 C2015 C2034 R225 C2026 2.2uF 0.1uF 150. C2055 R228 C2025 D200 100. C2024 C2016 C2004 0.1uF 2.2uF R226 150. L200 C2027 D201 390nH C2005 C2023 C2035 2.2uF R202...
Page 175 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-11 V_SF R231 L201 680nH C2009 C2008 C2007 C2011 C2038 R235 C2040 C2042 C2041 0.1uF 100n 0.1uF 0.1uF L209 R220 L208 100nH 510. 100nH C2010 C2039 100n C2021 L202 680nH C2022 R216...
Page 176 4-12 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics FRONT-END SHIELD R333 Q304 Q306 430. R346 C321 LOC_DIST R310 10.K R300 L302 15.K 10.K 1.2u R345 10.K Q300 R335 MIXER SHIELD 220. C324 C330 Q301 RX_EN 470.p L303 R339 C329...
Page 177 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-13 U301 C313 R306 R315 TC7W04F 100n 20.K 12.K FL301 FLTR OUT 2 U301 TC7W04F BW_SEL D302 D301 FL302 R305 R316 20.K FLTR 12.K OUT 2 C312 100n R314 R326 R324 12.K...
Page 178 4-14 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics IF501 COMP_B+ IF503 L120 1019447 C1098 C1114 C1113 C1097 C1088 9.3V 220.p SOURCE L500 220.p POWER SUPPLY SOURCE U501 FILT_B+ 9.3V IF502 57R01 LM2941T VOUT ON_OFF R5081 6.34K C5005 C5015 C5074...
Page 179 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-15 POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD R5024 C5056 C5101 100.K 100.n C5090 C5089 R5068 R5046 82.p 82.p R5022 AUDIO 6.2K 24.K 100.K R5023 100.K U506 R5056 R5045 FLAT_TX_AUDIO_INPUT_ACCESS_CONN 33.K LM2904 10.K C5055 U506 LM2904 R5025 C5081...
Page 180 4-16 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics D400 D3_3V D3_3V R462 D3_3V SCI_CH FILT_SW_B+ C410 LSIO 100n R451 R450 R439 FILT_SW_B+ CH_ACT 10.K 10.K 10.K SQ_DET TP404 TP406 TP410 HSIO SPI_MISO TEST_POINT TEST_POINT TEST_POINT Q407 SPI_MOSI OPT_DATA_R_OPBD Q400...
Page 181 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-17 FILT_SW_B+ Q403 D3_3V PROG_OUT-ALARM_4 R460 R401 1.5K 2.7K TP405 R444 TEST_POINT 10.K Q401 D3_3V Q415 BOOT_EN_IN_CH D3_3V R431 10.K VR400 C490 R436 R457 6.80 R459 D3_3V 47.K 33.K 3.3K Q412 R445...
Page 182 4-18 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics U100 LM2904 R141 22.K L101 IF701 C1046 DET_VFWD C1045 C1075 C1071 FILT_SW_B+ R117 IF702 INTEGRATOR R140 22.K R164 R144 22.K 10.K C1049 C1082 U100 C1048 LM2904 R146 IF700 DET_VRVS 22.K L102...
Page 183: Vhf2 Pcb 8488977U01 (Rev. P9) Parts List 1-25 W
VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-19 2.1 VHF2 PCB 8488977U01 (rev. P9) Parts Circuit Motorola Circuit Motorola Circuit Motorola List 1 25 W Description Description Description – Ref. Part No. Ref. Part No. Ref.
Page 184 4-20 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1127 2360567A03 CAP TANTALUM...
Page 185 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C335 2113740L17 C367 NOT PLACED –...
Page 186 4-22 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C5064 2113741F25 CAP CHIP CL2 X7R REEL 1000...
Page 187 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-23 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. FL301 9180468V06 SMD455KHZ 4 ELEMENT CER...
Page 188 4-24 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. Q505 4813824A10 TSTR NPN 40V .2A GEN PURP...
Page 189 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-25 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R308 0662057A80 CHIP RES 20K OHMS 5%...
Page 190 4-26 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R5036 0662057A89 CHIP RES 47K OHMS 5%...
Page 191 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics 4-27 Circuit Motorola Description Ref. Part No. VR400 NOT PLACED – VR401 4813830G12 DIODE 4.3V 5% ‘CP’ 500MW _4687 VR402 4813830A09 DIODE 3.3V 5% 225MW MMBZ5226B VR500 4813832C77 TRANS SUP. 24V HIGH PWR...
Page 192 4-28 VHF 1–25 W Band 2 PCB 8488977U01 (rev. P9) / Schematics Notes...
Page 193: Vhf 1-25 W Band 2 Pcb 8486672Z01 / Schematics
VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-29 VHF 1 25 W Band 2 PCB 8486672Z01 / Schematics – FILT_SW_B+ FILT_SW_B+ COMP_B+ INTEGRATOR INTEGRATOR DET_VRVS DET_VRVS DET-VFWD DET_VFWD TX_EN TX_EN PA Compartment RX_EN RX_EN MAIN PWR_SET PWR_SET PA_CURRENT PA_CURRENT PA_BIAS PA_BIAS...
Page 194 4-30 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 8486672Z01_REV O R101 C1007 C1064 C5100 C1065 C1097 L122 VR693 C1113 C1099 C1008 C1009 C1001 C1088 R150 R102 C1115 VR501 C1114 VR500 C1017 L126 R179 C1016 C1063 R5082 R5081 C5096 C1098 R5083 C1033...
Page 195 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-31 8486672Z01_REV O R113 C5000 R169 R114 C1055 R111 C5086 C1109 R127 R115 C1061 R126 L117 U102 R112 VR692 C1110 C1002 R404 C1035 R175 R147 R403 C5083 D100 VR503 R405 R421 M111 L500 C1092...
Page 196 4-32 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics D3_3V FILT_SW_B+ FILT_SW_B+ D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS CH_ACT DIGITAL SQ_DET LSIO HSIO F1200 uP_CLK VS_AUDIO_SEL J3 - RESET D3_3V J3-4 J3-17 VOICE STORAGE AUDIO SELECT SERIAL CLOCK J3-12 J3-16...
Page 197 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-33 TX_EN RX_EN FILT_SW_B+ (SOURCE) (SOURCE) (SOURCE) (SOURCE) (SOURCE) FILT_SW_B+ D3_3V D3_3V FILT_SW_B+ SPI_MOSI COMP_B+ COMP_B+ SPI_CLK ASFIC_CS PA_BIAS PA_BIAS CH_ACT PWR_SET PWR_SET SQ_DET LSIO PA_CURRENT PA_CURRENT HSIO TX_INJ F1200 uP_CLK DET_VFWD FILT_SW_B+ VS_AUDIO_SEL...
Page 198 4-34 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics PA_FILT_B+ (SOURCE) L100 IF109 1019447 L119 1019447 COMP_B+ IF110 R137 R186 39.K C1115 C1099 C1100 C1116 220.p 220.p C1053 C1000 C1112 C1110 C1109 C1106 C1089 C1107 C1103 FLT_9V 220.p 220.p 220.p 220.p 470p...
Page 199 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-35 IF100 PA_CURRENT R132 R114 100.K LM2904 10.K U102 R111 Final_cur_sense R177 C1095 R113 100. 220.p 10.K C1055 FILT_SW_B+_PA R101 C1056 C1073 CONTACTS FOR PA CLIP R110 R112 R115 100.K 10.K PLTD_HOLE3_5x7_0_TRIMMED C1058 R116...
Page 200 4-36 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics L217 390nH C2000 C2015 C2034 R225 C2026 2.2uF 0.1uF 150. C2055 R228 C2025 D200 100. C2024 C2016 C2004 0.1uF 2.2uF R226 150. L200 C2027 D201 390nH C2005 C2023 C2035 2.2uF R202 XTAL1 XTAL2...
Page 201 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-37 V_SF R231 L201 680nH C2009 C2008 C2007 C2011 C2038 R235 C2040 C2042 C2041 0.1uF 100n 0.1uF 0.1uF L209 R220 L208 100nH 510. 100nH C2010 C2039 100n C2021 L202 680nH C2022 R216 R215 3.9K...
Page 202 4-38 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics FRONT-END SHIELD R333 Q304 Q306 430. R346 C321 LOC_DIST R310 10.K R300 L302 15.K 10.K 1.2u R345 10.K Q300 R335 MIXER SHIELD 220. C324 C330 Q301 RX_EN 470.p L303 R339 C329 R327 D305...
Page 203 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-39 U301 C313 R306 R315 TC7W04F 100n 20.K 12.K FL301 FLTR OUT 2 U301 TC7W04F BW_SEL D302 D301 FL302 R305 R316 20.K FLTR 12.K OUT 2 C312 100n R314 R326 R324 12.K 2.4K 3.3K...
Page 204 4-40 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics IF501 COMP_B+ IF503 L120 1019447 C1098 C1114 C1113 C1097 C1088 9.3V 220.p SOURCE L500 220.p POWER SUPPLY SOURCE U501 FILT_B+ 9.3V IF502 57R01 LM2941T VOUT ON_OFF R5081 6.34K C5005 C5015 C5074 C5095 C5096...
Page 205 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-41 POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD R5024 C5056 C5101 100.K 100.n C5090 C5089 R5068 R5046 82.p 82.p R5022 AUDIO 6.2K 24.K 100.K R5023 100.K U506 R5056 R5045 FLAT_TX_AUDIO_INPUT_ACCESS_CONN 33.K LM2904 10.K C5055 U506 LM2904 R5025 C5081 C5033 100.K...
Page 206 4-42 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics D400 D3_3V D3_3V R462 D3_3V SCI_CH FILT_SW_B+ C410 LSIO 100n R451 R450 R439 FILT_SW_B+ CH_ACT 10.K 10.K 10.K SQ_DET TP404 TP406 TP410 HSIO SPI_MISO TEST_POINT TEST_POINT TEST_POINT Q407 SPI_MOSI OPT_DATA_R_OPBD Q400 D3_3V SPI_CLK...
Page 207 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-43 FILT_SW_B+ Q403 D3_3V PROG_OUT-ALARM_4 R460 R401 1.5K 2.7K TP405 R444 TEST_POINT 10.K Q401 D3_3V Q415 BOOT_EN_IN_CH D3_3V R431 10.K VR400 C490 R436 R457 6.80 R459 D3_3V 47.K 33.K 3.3K Q412 R445 ACCESS_PTT 10.K...
Page 208 4-44 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics U100 LM2904 R141 22.K L101 IF701 C1046 DET_VFWD C1045 C1075 C1071 FILT_SW_B+ R117 IF702 INTEGRATOR R140 22.K R164 R144 22.K 10.K C1049 C1082 U100 C1048 LM2904 R146 IF700 DET_VRVS 22.K L102 D101 C1047...
Page 209 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-45 3.1 VHF2 PCB 8486672Z01 Parts List 1 25 W – Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. C1031 2113743E07 CER CHIP CAP .022UF...
Page 210 4-46 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1128 2113740F59 CAP CHIP REEL CL1 +/-30 220...
Page 211 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-47 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C338 2113740F57 CAP CHIP REEL CL1 +/-30 180...
Page 212 4-48 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C5067 2113741F25 CAP CHIP CL2 X7R REEL 1000...
Page 213 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-49 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. FL304 9180469V06 SMD455KHZ 6 ELEMENT CER...
Page 214 4-50 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R105 0680194M18 RES 51 OHMS 5% 1W...
Page 215 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-51 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R314 0662057A75 CHIP RES 12K OHMS 5%...
Page 216 4-52 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R5041 0662057A82 CHIP RES 24K OHMS 5%...
Page 217 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics 4-53 Circuit Motorola Description Ref. Part No. VR501 4813830A14 DIODE 5.1V 5% 225MW MMBZ5231B_ VR502 NOT PLACED – VR503 4813830G09 DIODE 3.3V 5% ‘CK’ 500MW _4684 VR504 4813830G09 DIODE 3.3V 5% ‘CK’ 500MW...
Page 218 4-54 VHF 1–25 W Band 2 PCB 8486672Z01 / Schematics Notes...
Page 219 CM200/CM300/PM400 Radios VHF2 (146–174 MHz) 25–45 W Service Information Issue: May, 2009...
Page 220 Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied or reproduced in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola...
Page 221 Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM200/CM300/PM400 Model Chart..............1-1 2.0 Technical Specifications ..................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ......................2-1 2.0 VHF (146–174 MHz) Receiver................2-1 2.1 Receiver Front-End..................2-1 2.2 Receiver Back End ..................2-2 3.0 VHF Transmitter Power Amplifier (146–174 MHz)..........2-2 3.1 First Power Controller Stage................2-2 3.2 Power Controlled Driver Stage ..............2-3 3.3 Final Stage....................2-3...
Page 222 8.3 Dual Tone Multiple Frequency (DTMF) Data..........2-18 9.0 Receive Audio Circuits..................2-19 9.1 Squelch Detect ..................2-19 9.2 Audio Processing and Digital Volume Control ........... 2-20 9.3 Audio Amplification Speaker (+) Speaker (-) ..........2-20 9.4 Handset Audio ................... 2-21 9.5 Filtered Audio and Flat Audio ..............
Page 223 VHF 2 (146–174 MHz) 25–45 W Power Control Circuit ........4-18 2.1 VHF 2 PCB 8486487Z03-B Parts List 25–45 W ........4-19 3.0 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics........4-28 VHF 2 (146–174 MHz) 25–45 W Interconnection between Main Board and Power Amplifier Compartment ..........4-28 VHF 2 (146–174 MHz) 25–45 W 8486487Z04, Top Side View ......4-29 VHF 2 (146–174 MHz) 25–45 W 8486487Z04, Bottom Side View ....4-30 VHF 2 (146–174 MHz) 25–45 W Main Circuit (Sht 1 of 2) ........4-31...
Page 224 Notes...
Page 225: Chapter 1 Model Chart And Technical Specifications
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS CM200/CM300/PM400 Model Chart VHF2, 25–45 W, 146–174 MHz Model Description AAM50KQC9AA1AN CM200 146–174 MHz, 25–45 W, 4 CH AAM50KQF9AA1AN CM300 146–174 MHz, 25–45 W, 32 CH AAM50KQF9AA3AN PM400 146–174 MHz, 25–45 W, 64 CH Item Description PMUD1875_...
Page 226: Technical Specifications
MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification VHF2 Frequency Range: 146–174 MHz Frequency Stability ±2.5 PPM (-30°C to +60°C, 25°C Ref.) Channel Capacity: CM200 – 4 Channels CM300 – 32 Channels PM400 –...
Page 227 Technical Specifications Transmitter Specification VHF2 Power Output 25–45 W Conducted/Radiated -26 dBm Emissions: Audio Response: (from 6 dB/oct. Pre-Emphasis, TIA603 and CEPT 300 to 3000 Hz) Tx Audio Distortion < 3% Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 25 kHz FM Hum and Noise: -40 dB@12.5 kHz...
Page 228 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes...
Page 229: Chapter 2 Theory Of Operation
Chapter 2 THEORY OF OPERATION Introduction This Chapter provides a detailed theory of operation for the VHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual.
Page 230: Receiver Back End
THEORY OF OPERATION Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz.
Page 231: Power Controlled Driver Stage
VHF Transmitter Power Amplifier (146–174 MHz) Op-amp U103-3 monitors the drain current of U101 via resistors R122 & R197 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101.
Page 232: Harmonic Filter
THEORY OF OPERATION Harmonic Filter Inductors L111, L112, L124 and L113 along with capacitors C1132, C1022, C1020, C1137, C1018, and C1017 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 drains any electrostatic charges that might otherwise build up on the antenna. The harmonic filter also prevents high level RF signals above the receiver passband from reaching the receiver circuits to improve spurious response rejection.
Page 233: Fractional-N Synthesizer
VHF (146–174 MHz) Frequency Synthesis This oscillator is temperature compensated to an accuracy of +/-2.5 PPM from -30 to 60 degrees C. The temperature compensation scheme is implemented by an algorithm that uses five crystal parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C).
Page 234: Voltage Controlled Oscillator (Vco)
THEORY OF OPERATION Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX amplifier, and the modulation circuitry. AUX3 (U200 Pin 2) U200 Pin 32 Prescaler Out TRB IN Pin 20...
Page 235: Synthesizer Operation
VHF (146–174 MHz) Frequency Synthesis Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.
Page 236: Controller Theory Of Operation
THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
Page 237 Controller Theory of Operation The DC voltage applied to connector P2 supplies power directly to the following circuitry: • Electronic on/off control • RF power amplifier • 12 volts P-cH FET -U514 • 9.3 volt regulator • Audio PA Ignition Control Head RF_PA Audio_PA...
Page 238: Protection Devices
2-10 THEORY OF OPERATION Voltage regulator U503 provides 5 V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. Protection Devices Diode VR500 acts as protection against ESD, wrong polarity of the supply voltage, and load dump. VR692 –...
Page 239: Microprocessor Clock Synthesiser
Controller Theory of Operation 2-11 While the radio is switched on, the µP monitors the voltage at the emergency input on the accessory connector via U403-pin 62. Three different conditions are distinguished: no emergency kit is connected, emergency kit connected (unpressed), and emergency press. If no emergency switch is connected or the connection to the emergency switch is broken, the resistive divider R5030 / R5049 will set the voltage to about 3.14 volts (indicates no emergency kit found via EMERGENCY_SENSE line).
Page 240: Serial Peripheral Interface (Spi)
2-12 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.
Page 241: Normal Microprocessor Operation
Controller Theory of Operation 2-13 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory.
Page 242: Static Random Access Memory (Sram)
2-14 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles.
Page 243: Transmit Audio Circuits
Transmit Audio Circuits 2-15 Transmit Audio Circuits 24kOhms TX SND TX RTN U509 CONTROL HEAD FILTERS AND CONNECTOR PREEMPHASIS ASFIC_CMP GCB3 U504 LIMITER HS SUMMER EXT MIC U509 SPLATTER FLAT TX FILTER AUDIO MOD IN ACCESSORY LS SUMMER CONNECTOR SECTION GCB5 (SYNTHESIZER) ATTENUATOR...
Page 244: Ptt Sensing And Tx Audio Processing
2-16 THEORY OF OPERATION 7.1.2 Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3 V is routed to R429 via R458, D401, and it create 0.7 V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430.
Page 245: Transmit Signalling Circuits
Transmit Signalling Circuits 2-17 Transmit Signalling Circuits SUMMER HIGH SPEED 5-3-2 STATE ENCODER CLOCK IN SPLATTER (HSIO) FILTER DTMF MICRO ENCODER CONTROLLER U403 ASFIC_CMP U504 LOW SPEED ENCODER SUMMER CLOCK IN (LSIO) TO RF ATTENUATOR SECTION MOD IN (SYNTHESIZER) Figure 2-8 Transmit Signalling Path From a hardware point of view, there are 3 types of signaling: •...
Page 246: High Speed Data
2-18 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings.
Page 247: Receive Audio Circuits
Receive Audio Circuits 2-19 Receive Audio Circuits ACCESSORY CONNECTOR FLT RX AUDIO AUDIO SPKR + EXTERNAL SPKR - U502 SPEAKER SPKR+ SPKR- CONTROL HEAD CONNECTOR MUTE U509 INTERNAL SPEAKER HANDSET AUDIO U505 U IO GCB4 URX OUT AUDIO GCB1 AUX RX VOLUME ASFIC_CMP ATTEN.
Page 248: Audio Processing And Digital Volume Control
2-20 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2. The signal is then applied to both the audio and the PL/DPL paths.
Page 249: Handset Audio
Receive Signalling Circuits 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified.
Page 250: Alert Tone Circuits
2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle.
Page 251: Chapter 3 Troubleshooting Charts
Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio.
Page 252: Troubleshooting Flow Chart For Receiver Rf (Sheet 1 Of 2)
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) START Problem in 12 KHz and 25 KHz channel spacing 9V on Check Go to R310 (LNA) to U301 Go to RX_EN DC Section Okay ? DC Section –...
Page 253: Troubleshooting Flow Chart For Receiver (Sheet 2 Of 2)
Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) From Check visually FE and BE Go to (IFIC -Vcc) components DC Section OK ? installation ? Inject - 40dBm (CW) Check to RF connector Installation...
Page 254: Troubleshooting Flow Tx Rf (No Output Power)
TROUBLESHOOTING CHARTS Troubleshooting Flow TX RF (No Output Power) START Key the radio Measure TP102 Tune the Short TP110 to ground TP102 PA_BIAS and measure the < 1.8 Vdc? Output Power Replace POUT L108 < 1 Watt...
Page 255 Troubleshooting Flow TX RF (No Output Power) Troubleshooting Flow TX RF (No Output Power/No Current) START Key the radio Replace Measure the Tune the POUT > resistance from PA_BIAS 10 Watts R131 to ground (Q100) Tune the Replace the Replace 20kOhms PA_BIAS PA (Q100)
Page 256: Troubleshooting Flow Tx Rf (Not Txing At Nominal Power)
TROUBLESHOOTING CHARTS Troubleshooting Flow TX RF (Not Txing at Nominal power START Key the radio Measure TP103 Is TP102 Tune the PA_BIAS Measure the resistance < 1.8 V dc? from R131 to ground Is R131 Tune the K and M factors Repalace PA (Q100) <...
Page 257: Troubleshooting Flow Chart For Synthesizer
Troubleshooting Flow Chart for Synthesizer Troubleshooting Flow Chart for Synthesizer 3V at Check 3V U200 pins 5, Start Regulator 20, 34 & 36 U508 Visual Correct check of the Problem Board OK? Is 16.8MHz 16.8MHz Replace Signal at signal at U200 Is U200 U200 Pin 19?
Page 258: Troubleshooting Flow Chart For Vco
TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for VCO Low or no RF Signal Low or no RF Signal TX VCO RX VCO at input to PA at TP1 Visual check Visual check Correct of board of board Problem Make sure U508 is working correctly and runner 3.3 DC at U201 3.3V DC at U201...
Page 259: Troubleshooting Flow Chart For Dc Supply (1 Of 2)
Troubleshooting Flow Chart for DC Supply (1 of 2) Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope.
Page 260: Troubleshooting Flow Chart For Dc Supply (2 Of 2)
3-10 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Check Voltage on V=3.3V C5041 Replace U510 Go to Start 9v<V<9.8v...
Page 261: Allocation Of Schematics And Circuit Boards
Chapter 4 VHF2 PCB / SCHEMATICS / PARTS LISTS Allocation of Schematics and Circuit Boards VHF2 and Controller Circuits The VHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for both the VHF circuits and the Controller circuits. The PCB component layouts and the Parts Lists in this Chapter show both the Controller and VHF circuit components.
Page 262 VHF2 PCB / SCHEMATICS / PARTS LISTS Notes...
Page 263: Vhf 25-45 W Band 2 Pcb 8486487Z03-B / Schematics
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics FILT_SW_B+ INTEGRATOR DET_VRVS FILT_SW_B+ DET-VFWD V_CTRL_DRIVER TX_EN PWR_SET RX_EN TX_EN PA_BIAS PWR_SET RX_EN V_CTRL_DRIVER INTEGRATOR PA_BIAS COMP_B+ DET_VRVS TX_INJ DET_VFWD TX_INJ VHF 2 (146–174 MHz) 25–45 W Interconnection between Main Board and Power Amplifier Compartment...
Page 264: Vhf 2 (146-174 Mhz) 25-45 W 8486487Z03-B, Top Side View
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics R101 R5087 C1064 C1096 C1007 C1097 C5100 C1065 L122 VR693 C1113 C1099 C1008 C1009 C1088 C1001 R102 C1115 VR501 VR500 C1114 R190 R179 R199 C1063 R5082 R5081 C5096 R191 M102 C1098 C1033 R5083 R178...
Page 265: Vhf 2 (146-174 Mhz) 25-45 W 8486487Z03-B, Bottom Side View
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics R113 C5000 R169 R111 C1055 C1109 R114 R127 C1061 C5086 R115 R126 D402 VR692 R116 C1110 C1002 R404 C1035 R403 R147 TP103 R175 C5083 VR503 D100 R405 TP102 M111 TP108 L500 R5049 R421 C5060...
Page 266: Vhf 2 (146-174 Mhz) 25-45 W Main Circuit (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics TX_EN SPI_CLK SPI_MOSI RSSI FILT_SW_B+ SYNTH_CS D3_3V SYNTH_LOCK RX_EN SPI_MOSI SPI_MISO FILT_SW_B+ D3_3V TX_EN SPI_CLK LOC_DIST RX_EN (SOURCE ) D3_3 V (SOURCE) (SOURCE) (SOURCE) LOC_DIST D3_3V RSSI SPI_MOSI SYNTH_CS SPI_CLK SYNTH_LOCK ASFIC_CS ASFIC_CS DIGITAL...
Page 267: Vhf 2 (146-174 Mhz) 25-45 W Main Circuit (Sht 2 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics TX_EN SPI_CLK SPI_MOSI RSSI SYNTH_CS SYNTH_LOCK RX_EN TX_EN LOC_DIST RX_EN (SOURCE) FILT_SW_B+ COMP_B+ PWR_SET V_CTRL_DRIVER FILT_SW_B+ COMP_B+ PA_BIAS PA_BIAS TX_INJ PWR_SET FILT_SW_B+ V_CTRL_DRIVER FILT_SW_B+ DET_VFWD INTEGRATOR INTEGRATOR DET_VRVS POWER_CONTROL DET_VRVS DET-VFWD TX_INJ DC &...
Page 268: Vhf 2 (146-174 Mhz) 25-45 W Transmitter (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics PA_FILT_B+ (SOURCE) L100 35U02 C1089 C1112 C1110 C1107 C1103 C1000 C1109 C1106 R186 1000pF 220pF 470pF .033uF 220pF 220pF 220pF 470pF R137 C1027 10uF PA_FILT_B+ C1053 1000pF FILT_SW_B+_PA C1040 R138 C1072 FLT_9V VCNTR3 VCNTR3...
Page 269: Vhf 2 (146-174 Mhz) 25-45 W Transmitter (Sht 2 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics R132 100K U102-2 TP108 LM2904 IF109 R111 R114 L119 35U02 R177 COMP_B+ Final_cur_sense TP113 C1115 C1099 C1100 C1116 100 NU C1055 FILT_SW_B+_PA IF110 R113 220pF D107 220pF 1000pF 1000pF C1056 1000pF C1073 IF112 R5291...
Page 270: Vhf 2 (146-174 Mhz) 25-45 W Synthesiser And Vco (Sht 1 Of 2)
4-10 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics LVFRACN Shield L217 390nH C2026 C2000 R225 C201 5 C2034 1000pF 2.2uF 0.1u F .01uF C2025 C2055 R228 22pF .01uF D200 C2016 C2004 L200 R226 0.1uF 2.2uF C2024 390nH .01uF C2005 C2023 C2035...
Page 271: Vhf 2 (146-174 Mhz) 25-45 W Synthesiser And Vco (Sht 2 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-11 V_SF VCOBIC Shield SH202 L201 R231 SHIELD 680nH C2007 C2009 C2038 C2008 C2042 C2041 C2040 0.1uF C2011 0.1uF 1000pF 1000pF 0.1uF 1000pF 1000pF R235 0.1uF L209 R220 100nH L208 C2010 C2039 100nH 0.1uF...
Page 272: Vhf 2 (146-174 Mhz) 25-45 W Receiver Front And Back End (Sht 1 Of 2)
4-12 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics FRONT-END SHIELD Q304 Q306 R333 C321 R346 LOC_DIST .01uF L302 R300 R310 1.2uH C330 R345 SH301 R335 C324 470pF Q300 SHIELD Q301 1000pF RX_EN C329 R339 L303 1.2uH D305 470pF R327 C331 2.4K...
Page 273: Vhf 2 (146-174 Mhz) 25-45 W Receiver Front And Back End (Sht 2 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-13 U301-1 TC7W04F FL301 R306 R315 FLTR C313 OU T 0.1uF U301-2 TC7W04F BW_SEL D302 R316 D301 R305 FL302 C312 20 K FLTR 0.1uF R314 R324 R326 3.3K 2.4K Check if it is 3v or another value C316 0.1uF U301-4...
Page 274: Vhf 2 (146-174 Mhz) 25-45 W Dc And Audio Circuits (Sht 1 Of 2)
4-14 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics IF501 COMP_B+ IF503 L120 POWER SUPPLY spacer for TO-22 0 C1113 C1097 C1088 C1098 C1114 SOURCE 35U02 AUDIO POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BR 220pF 1000pF 1000pF 1000pF 220pF U501 SOURCE LM2941T IF502 FILT_B + 9.3V 9.3V VI N...
Page 275: Vhf 2 (146-174 Mhz) 25-45 W Dc And Audio Circuits (Sht 2 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-15 C5089 C5090 C5056 82pF R5024 R5068 82pF POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD R5022 6.2K 100K 4.7uF C5101 R5046 100K R5056 U506-2 1000pF LM2904 R5045 C5081 C5033 C5055 R5023 FLAT_TX_AUDIO_INPUT_ACCESS_CONN 0.1uF 1000pF 100K C5032 4.7uF R5025 U506-1 0.1uF...
Page 276: Vhf 2 (146-174 Mhz) 25-45 W Microprocessor And Controller Circuits (Sht 1 Of 2)
4-16 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics D3_3V R462 SCI_CH TP410 TEST_POINT SPI_MISO C410 R451 TEST_POINT R439 R450 TP406 LSIO 0.1uF SPI_MOSI CH_ACT SPI_CLK SQ_DET ASFIC_CS TP404 HSI O Q407 TEST_POINT Q400 SYNTH_CS OPT_DATA_R_OPBD DISPLAY_CS_CH D3_3V uP_CLK SHIFT_R_CS D3_3V SPI_MISO...
Page 277: Vhf 2 (146-174 Mhz) 25-45 W Microprocessor And Controller Circuits (Sht 2 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-17 D3_3V FILT_SW_B+ Q403 R460 R401 PROG_OUT-ALARM_4 R444 2.7K 1.5K TP405 TEST_POINT Q401 R431 Q415 D3_3V BOOT_EN_IN_CH VR400 D3_3V C490 R459 6.8V R445 R436 R457 3.3K ACCESS_PTT D3_3V Q414 Q412 D3_3V R458 3.3K R422...
Page 278: Vhf 2 (146-174 Mhz) 25-45 W Power Control Circuit
4-18 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics U100-1 LM2904 L101 R141 C1046 IF701 1000pF DET_VFWD C1071 C1075 C1045 1000pF 1000pF 1000pF FILT_SW_B+ R117 IF702 R140 INTEGRATOR C1082 R144 R164 1000pF C1049 6.2K C1048 1000pF R146 1000pF IF700 L102 DET_VRVS C1076...
Page 279: Vhf 2 Pcb 8486487Z03-B Parts List 25-45 W
VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-19 VHF 2 PCB 8486487Z03-B Circuit Motorola Circuit Motorola Circuit Motorola Parts List 25–45 W Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Circuit Motorola C330 2113740F67...
Page 280 4-20 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1000 2113740F59 CAP, 220pF C1035 2113743E07 CAP, .022uF...
Page 281 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-21 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1128 2113740F59 CAP, 220pF C2021 2113741F49 CAP, .01uF...
Page 282 4-22 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C5033 2113743K15 CAP, 0.1uF C5063 2113741M69 CAP, 0.1uF...
Page 283 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-23 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. D511 4813833C02 MMBD6100, DUAL L117 7686135U02...
Page 284 4-24 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. Q415 NOT PLACED MMBT3904 R118 0662057C55...
Page 285 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-25 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R220 0662057A42 RES, 510 R314 0662057A75...
Page 286 4-26 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R610 0662057C59 RES, 220 R5037 0662057A73...
Page 287 VHF 25–45 W Band 2 PCB 8486487Z03-B / Schematics 4-27 Circuit Motorola Circuit Motorola Description Description Ref. Part No. Ref. Part No. U405 5113805A75 MC74HC595A, SHIFT VR502 NOT PLACED MMSZ4686T1, 3.9V ZENER U500 5180932W01 LM2904, OPAMP VR503 4813830G09 MMSZ4684, 3.3V ZENER...
Page 288: Vhf 25-45 W Band 2 Pcb 8486487Z04 / Schematics
4-28 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics FILT_SW_B+ INTEGRATOR DET_VRVS FILT_SW_B+ DET-VFWD V_CTRL_DRIVER TX_EN PWR_SET RX_EN TX_EN PA_BIAS PWR_SET RX_EN V_CTRL_DRIVER INTEGRATOR PA_BIAS COMP_B+ DET_VRVS TX_INJ DET_VFWD TX_INJ VHF 2 (146–174 MHz) 25–45 W Interconnection between Main Board and Power Amplifier Compartment...
Page 289: Vhf 2 (146-174 Mhz) 25-45 W 8486487Z04, Top Side View
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-29 R101 C632 C623 R5087 C1064 C631 C1096 C1007 C1097 VR693 C5100 C1065 L122 C1113 C1099 C1008 C1009 C1088 C1001 VR501 R102 C1115 VR500 C1114 R190 R5082 R179 C1063 C5096 R5081 R191 C1098 C1033...
Page 290: Vhf 2 (146-174 Mhz) 25-45 W 8486487Z04, Bottom Side View
4-30 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics R113 C5000 R169 C1055 R111 R114 C1109 R127 C1061 C5086 R126 VR692 D402 C1110 C1002 C1035 R404 R403 R175 C5083 R147 D100 R405 TP102 TP108 M111 L500 VR503 R5049 R421 C5055 C1128 C5060...
Page 291: Vhf 2 (146-174 Mhz) 25-45 W Main Circuit (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-31 TX_EN SPI_CLK SPI_MOSI RSSI FILT_SW_B+ SYNTH_CS D3_3V SYNTH_LOCK RX_EN FILT_SW_B+ D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO LOC_DIST RX_EN D3_3 V (SOURCE) (SOURCE ) (SOURCE) (SOURCE) LOC_DIST D3_3V RSSI SPI_MOSI SYNTH_CS SPI_CLK SYNTH_LOCK ASFIC_CS ASFIC_CS...
Page 292: Vhf 2 (146-174 Mhz) 25-45 W Main Circuit (Sht 2 Of 2)
4-32 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics TX_EN SPI_CLK SPI_MOSI RSSI SYNTH_CS SYNTH_LOCK RX_EN TX_EN LOC_DIST RX_EN (SOURCE) COMP_B+ FILT_SW_B+ PWR_SET V_CTRL_DRIVER FILT_SW_B+ COMP_B+ PA_BIAS PA_BIAS TX_INJ PWR_SET FILT_SW_B+ V_CTRL_DRIVER FILT_SW_B+ DET_VFWD INTEGRATOR INTEGRATOR DET_VRVS POWER_CONTROL DET_VRVS DET-VFWD TX_INJ DC &...
Page 293: Vhf 2 (146-174 Mhz) 25-45 W Transmitter (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-33 PA_FILT_B+ (SOURCE) L100 35U02 C1089 C1000 C1112 C1110 C1109 C1106 C1107 R186 C1103 1000pF 220pF 220pF 220pF 470pF 470pF .033uF 220pF R137 C1027 10uF PA_FILT_B+ C1053 1000pF FILT_SW_B+_PA C1040 R138 C1072 FLT_9V VCNTR3...
Page 294: Vhf 2 (146-174 Mhz) 25-45 W Transmitter (Sht 2 Of 2)
4-34 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics R132 100K U102-2 TP108 LM2904 IF109 R111 R114 L119 35U02 COMP_B+ R177 Final_cur_sense C1115 C1099 C1100 C1116 TP113 100 NU C1055 FILT_SW_B+_PA IF110 R113 D107 220pF 220pF 1000pF 1000pF C1056 1000pF C1073 IF112...
Page 295: Vhf 2 (146-174 Mhz) 25-45 W Synthesiser And Vco (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-35 LVFRACN Shield L217 390nH C2026 R225 C2000 C201 5 C2034 0.1u F 1000pF 2.2uF .01uF C2025 C2055 R228 22pF .01uF D200 C2016 C2004 L200 R226 0.1uF 2.2uF C2024 390nH .01uF C2005 C2023 C2035...
Page 296: Vhf 2 (146-174 Mhz) 25-45 W Synthesiser And Vco (Sht 2 Of 2)
4-36 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics V_SF VCOBIC Shield SH202 L201 R231 SHIELD 680nH C2007 C2009 C2038 C2008 C2042 C2041 C2040 0.1uF C2011 1000pF 0.1uF 1000pF 0.1uF 1000pF 1000pF R235 0.1uF L209 R220 100nH L208 C2010 C2039 100nH 0.1uF...
Page 297: Vhf 2 (146-174 Mhz) 25-45 W Receiver Front And Back End (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-37 FRONT-END SHIELD Q304 Q306 R333 C321 R346 LOC_DIST .01uF L302 R300 R310 1.2uH C330 R345 SH301 R335 C324 470pF Q300 SHIELD Q301 1000pF RX_EN C329 R339 L303 1.2uH R327 D305 470pF C331 2.4K...
Page 298: Vhf 2 (146-174 Mhz) 25-45 W Receiver Front And Back End (Sht 2 Of 2)
4-38 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics U301-1 TC7W04F R306 FL301 R315 FLTR C313 OU T 0.1uF U301-2 TC7W04F BW_SEL D302 R316 D301 R305 FL302 C312 20 K FLTR 0.1uF R314 R324 R326 3.3K 2.4K Check if it is 3v or another value C316 0.1uF U301-4...
Page 299: Vhf 2 (146-174 Mhz) 25-45 W Dc And Audio Circuits (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-39 IF501 COMP_B+ IF503 L120 POWER SUPPLY spacer for TO-22 0 C1113 C1097 C1088 C1098 C1114 SOURCE 35U02 AUDIO POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BR 220pF 1000pF 1000pF 1000pF 220pF U501 SOURCE LM2941T IF502 FILT_B + 9.3V 9.3V VOUT...
Page 300: Vhf 2 (146-174 Mhz) 25-45 W Dc And Audio Circuits (Sht 2 Of 2)
4-40 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics C5089 C5090 C5056 82pF R5024 R5068 82pF R5022 POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD 6.2K 100K 4.7uF C5101 R5046 100K R5056 U506-2 1000pF LM2904 R5045 C5081 C5033 C5055 R5023 FLAT_TX_AUDIO_INPUT_ACCESS_CONN 1000pF 0.1uF 100K C5032 4.7uF U506-1 R5025 0.1uF...
Page 301: Vhf 2 (146-174 Mhz) 25-45 W Microprocessor And Controller Circuits (Sht 1 Of 2)
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-41 D3_3V R462 SCI_CH TP410 TEST_POINT SPI_MISO C410 R439 R451 TEST_POINT R450 TP406 LSIO 0.1uF SPI_MOSI CH_ACT SPI_CLK SQ_DET ASFIC_CS TP404 HSI O TEST_POINT Q407 Q400 SYNTH_CS OPT_DATA_R_OPBD DISPLAY_CS_CH D3_3V uP_CLK SHIFT_R_CS D3_3V SPI_MISO...
Page 302: Vhf 2 (146-174 Mhz) 25-45 W Microprocessor And Controller Circuits (Sht 2 Of 2)
4-42 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics D3_3V FILT_SW_B+ Q403 R460 R401 PROG_OUT-ALARM_4 R444 2.7K 1.5K TP405 TEST_POINT Q401 R431 Q415 D3_3V BOOT_EN_IN_CH VR400 D3_3V C490 R459 6.8V R445 R436 R457 3.3K ACCESS_PTT D3_3V Q414 Q412 D3_3V R458 3.3K R422...
Page 303: Vhf 2 (146-174 Mhz) 25-45 W Power Control Circuit
VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-43 U100-1 LM2904 L101 R141 C1046 IF701 1000pF DET_VFWD C1071 C1075 C1045 1000pF 1000pF 1000pF FILT_SW_B+ R117 IF702 R140 INTEGRATOR C1082 R144 R164 1000pF C1049 6.2K C1048 1000pF R146 1000pF IF700 L102 DET_VRVS C1076...
Page 304: Vhf 2 Pcb 8486487Z04 Parts List 25-45 W
4-44 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics VHF 2 PCB 8486487Z04 Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Parts List 25–45 W Ref. Part No. Ref. Part No. Ref. Part No. Circuit Motorola C329 2113740F67...
Page 305 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-45 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C678 2113741M69 CAP, 0.1uF C1033 2113743E07 CAP, .022uF...
Page 306 4-46 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C1123 2113740F59 CAP, 220pF C2015 2113743E20 CAP, 0.1uF...
Page 307 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-47 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. C5027 2113743K15 CAP, 0.1uF C5057 2113928C04 CAP, 4.7uF...
Page 308 4-48 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. Q408 4880048M01 DTC144EKA, BIPOLAR R111 NOT PLACED...
Page 309 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-49 Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R213 0662057A65 RES, 4.7K R307 0662057A80...
Page 310 4-50 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics Circuit Motorola Circuit Motorola Circuit Motorola Circuit Motorola Description Description Description Description Ref. Part No. Ref. Part No. Ref. Part No. Ref. Part No. R470 NOT PLACED RES, 10K R5030...
Page 311 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics 4-51 Circuit Motorola Circuit Motorola Description Description Ref. Part No. Ref. Part No. U300 5186144B01 SA616, IFIC VR400 NOT PLACED MMBZ5232B, 5.6V ZENER U301 5109522E10 TC7W04F, INVERTER VR401 4813830G12 MMSZ4687T1, 4.3V...
Page 312 4-52 VHF 25–45 W Band 2 PCB 8486487Z04 / Schematics Notes...
Page 314 MOTOROLA, the Stylized M Logo, and Radius are registered in the U.S. Patent and Trademark Office. All other product or service names are the property of their respective owners. © 2003-2009 Motorola, Inc. All rights reserved. Printed in the U.S.A.

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Radius cm300 Pm400

Motorola Radius CM200 Service Manual

Table of Contents

Chapter 1 INTRODUCTION

Chapter 2 MAINTENANCE

Chapter 3 SERVICE AIDS

Overview/Theory of Operation

Section 3

Chapter 4 Vhf1 Pcb / Schematics / Parts Lists

Section 4

Section 5

Quick Links

Chapters

Troubleshooting

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Summary of Contents for Motorola Radius CM200