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Motorola C357 Service Manual
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Motorola C357 Service Manual

Motorola C357 Service Manual

Digital wireless telephone
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Service Manual
Level 3
Model C357
CDMA 800MHz, & Analog 800MHz

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Summary of Contents for Motorola C357

  • Page 1 Service Manual Level 3 Model C357 CDMA 800MHz, & Analog 800MHz...
  • Page 2 CDMA Average Power & Channel Power ........................43 FER with AWGN Tests..............................44 Circuit Description................................45 Receiving Section................................ 45 Transmitting Section ..............................46 Baseband Section ................................ 47 Troubleshooting ................................52 Logic Part Troubleshooting ............................53 Page 2 of 107 Motorola Confidential & Proprietary...
  • Page 3 Disassembly................................86 B. Replacement Part ..............................89 C. C357 Part List ................................. 90 D. Audio Test Configuration ............................99 E. C357 RF BLOCK (Zero IF) DIAGRAM......................100 F. Board Location Map.............................. 101 G. Schematics ................................102 Page 3 of 107...
  • Page 4 This manual is the property of MOTOROLA. No part of this manual may be duplicated in any form without the express written permission of MOTOROLA. This manual must be returned upon...
  • Page 5 Contact your regional Customer Support Manager for details. Model and Kit Identification MOTOROLA products are specifically identified by an overall model number on the FCC label. In most cases, assemblies and kits which make up the equipment also have kit model numbers stamped on them.
  • Page 6 The portable telephone should only be used in situations in which the driver considers it safe to do so. Use of a cellular portable while driving may be illegal in some areas. Refer to the appropriate section of the product service manual for additional pertinent safety information. Page 6 of 107 Motorola Confidential & Proprietary...
  • Page 7 C-357 Level 3 SERVICE MANUAL Specifications General Information Name of equipment C-357 (CDMA/AMPS DUAL MODE) Mode CDMA AMPS Tx: 824.64~848.37MHz Tx : 824.04~848.97MHz Working Frequency Range Rx: 869.64~893.37MHz Rx : 869.04~893.97MHz Duplex Frequency Separation 45MHz 45MHz Modulation HPSK Analog FM, 8KHz Dev Chip Rate 1.2288Mbps RF Bandwidth per Carrier...
  • Page 8 C-357 Level 3 SERVICE MANUAL Specification of Transmitting Section CDMA 824.64 ~ 848.37MHz Frequency Range AMPS 824.04 ~ 848.97MHz Lo Frequency Range 824.04MHz ~ 848.97MHz Intermediate Frequency Zero-IF CDMA 330mW max Output AMPS 500mW max CDMA ±300Hz Frequency Stability AMPS ±2.5PPM - 48 dBm ±...
  • Page 9 C-357 Level 3 SERVICE MANUAL Specification of Receiving Section CDMA 869.64 ~ 893.37MHz Frequency Range AMPS 869.04 ~ 893.97MHz Lo Frequency Range 1738.08MHz ~ 1787.94MHz Sensitivity CDMA -104 dBm (FER 0.5 % or less) AMPS -116 dBm (12dB SINAD) Intermediate Frequency Zero-IF 30dB C/N Degration CDMA...
  • Page 10 C-357 Level 3 SERVICE MANUAL NAM Programming NAM Programming Instruction 1. Introduction The Number Assignment Module(NAM) is a section of memory that retains information about the phone’s characteristics, such as the assigned telephone number, system identification number, and options information. Regardless of the method used, the NAM must be programming before the phone can be placed into service.
  • Page 11 False NEW_SCAN : the New channel-scanning to acquire a service after power- up/call-release .(Motorola Specific Function) False LOST_CHANNEL_SCAN : This item is concerned with Load Balance of operator. In other words, this feature is needed to balance the loading on two...
  • Page 12 C-357 Level 3 SERVICE MANUAL 00000000000 Mobile Directory Number : 10 digits mobile phone number. Number is assigned by system operator. CDMA : Primary Channel. System A up to 4 decimal digits. CDMA : Primary Channel. System B up to 4 decimal digits. CDMA : Secondary Channel.
  • Page 13 C-357 Level 3 SERVICE MANUAL Usage of “Easy NAM Programming” Setup Method When entering the Easy NAM Programming, If OTSL(One Time Subsidy Lock) is activated, the OTSL code programmed in the phone is required and MSL(Master Subsidy Lock) shall be ignored. If OTSL is deactivated and MSL is programmed, the MSL code is required.
  • Page 14 C-357 Level 3 SERVICE MANUAL 5. Enter the Phone Number of NAM1 by digit number Enter MDN Number 0000000000 6. Enter the Vocoder Selection by using up/down keys (EVRC and QCELP 13K). Vocoder Selection EVRC 7. Press [OK] key to execute and then finish Easy NAM Programming. 8.
  • Page 15 C-357 Level 3 SERVICE MANUAL Usage of “NAM Programming” Setup Method When entering the NAM Programming, SPC code is required instead of OTSL or MSL. 1. Press “[#] [#] [7] [3] [8] [8] [7] [#] [#] [END]” keys to enter the NAM programming mode. The following “Enter NAM password”...
  • Page 16 C-357 Level 3 SERVICE MANUAL 6. Enter SCM value by digit number. This value should not be changed. STATION CLASS MARK 01101010 7. Enter Slot Cycle Index by digit number. The range of this value is 0 to 7. SLOT CYCLE INDEX 8.
  • Page 17 C-357 Level 3 SERVICE MANUAL 12. Enter Lock Code by 4 digits number LOCK CODE 1234 13. Enter Mobile Country Code of NAM1 by 3 digits number For NAM1 14. Enter IMSI_11(first digit) and INSI_12(second digit) of NAM1 IMSI_11_12(MNC) For NAM1 15.
  • Page 18 C-357 Level 3 SERVICE MANUAL CDMA PRI B CHAN. For NAM1 19. Enter the Secondary Channel System A of NAM1 by up to 4 digits number CDMA SEC ACHAN. For NAM1 20. Enter the Secondary Channel System B of NAM1 by up to 4 digits number CDMA SEC B CHAN.
  • Page 19 C-357 Level 3 SERVICE MANUAL SID LOCK For NAM1 0 th 25. Enter NID Lock List of NAM1 (the range of this value is 0 to 5) NID LOCK For NAM1 0 th 65535 26. Enter the AMPS Mobile Identification Number1(MIN1) of NAM1 by digit number AMPS MIN1 For NAM1 0000000...
  • Page 20 C-357 Level 3 SERVICE MANUAL MOB TermHome CDM.. For NAM1 True 31. Select the AMPS Config bit for mob term using home SID, NID pair of NAM1 by using up/down keys (True, False) MOB TermHome AMP.. For NAM1 True 32. Select the CDMA Config bit for mob term while SID roamer of NAM1 by using up/down keys (True, False) MOB Term SID CDMA For NAM1...
  • Page 21 C-357 Level 3 SERVICE MANUAL 36. Repeat from 2 to 5 and from 13 to 35 change the NAM2. 37. Press [OK] key to finish the NAM programming mode. 39. The phone will be turn off by itself when arrives the end of this NAM programming mode. .
  • Page 22 C-357 Level 3 SERVICE MANUAL Manual Test Mode 1. Introduction Manual test mode software allows service personal to monitor the telephone status on the display, and manually control telephone functions via the keypad. Manual test mode operates at two levels; 1) call status display which allows the phone to operate normally while providing status indications in the display, and 2) Service level which disables normal call processing and allows commands to be entered through the keypad to manually control operation of the keypad.
  • Page 23 C-357 Level 3 SERVICE MANUAL PNxxxR-xxxChxxx S:xxxx N:xxxx i Page EcIo:-09.0 where PN OFFSET strongest active pilot RSSI Current RF Channel. If the current RF channel is more than 3 digits, the “C” is erased then display 4 digits of channel. Slot cycle index Page Mobile’s state.
  • Page 24 C-357 Level 3 SERVICE MANUAL 5. Entering AMPS Manual Test Mode Manual test mode is entered by entering the following keypad sequence; Press [*] [7] [3] [8] [3] [7] [8] [#] [END] then [1][3][ FM Manual Test][SELECT], [1][1][1][SEND] to initialize for test. [Notice] Press [#] [#] [2] [6] [7] [7] [END] before enter manual test mode for all audio test, then LCD window is displayed [FM TEST ON]...
  • Page 25 C-357 Level 3 SERVICE MANUAL Test Procedure Hardware Introduction C-357 allows keypad controlled testing. This chapter includes the keypad button functions and recommended equipment setup to use when testing. Automatic Call-Processing Tests Most communications analyzers can simulate site in order to perform automatic call processing tests.
  • Page 26 C-357 Level 3 SERVICE MANUAL The analog and digital parameters are stored in EEPROM on the Transceiver Board. Each transceiver is shipped from the factory with these parameters already calibrated. However, if a board is repaired, these parameters should be measured and, if necessary, adjusted. Checking and adjusting calibration parameters is also useful as a troubleshooting/diagnostic tool to isolate defective assemblies.
  • Page 27 C-357 Level 3 SERVICE MANUAL Connections for performing Test (AMPS) The diagram below shows the recommended connections for testing. A variety of communications analyzers may be used. Refer to the analyzer manufacturer’s user manual for proper setup before starting test Connections for Testing HP8924C FUNCTION...
  • Page 28 C-357 Level 3 SERVICE MANUAL RF Cable Test DUPLEX TEST To test the RF cable TX Frequency AC Level for proper loss: ◙ Tune Freq should be set to SINAD TX Power TX frequency: 825 MHz. -0.54 ◙ RF Gen Freq should be set to same frequency (825MHz).
  • Page 29 C-357 Level 3 SERVICE MANUAL Set up for Analog call CALL CONTROL Display Select CALL CNTL button from the Data / Meas Analog Screen Control panel Phone : 111-111-1111 ◙ Select System type: AMPS Active ESN (dec) : 156-4460397 Register ESN (hex) : 9C440F6D ◙...
  • Page 30 C-357 Level 3 SERVICE MANUAL RX Sensitivity Test (SINAD) Communications Analyzer RX TEST Setup: ◙ Select RX TEST button from the Analog Screen Control panel SINAD AC Level ◙ Set RX frequency to 882.3 MHz ◙ Set Amplitude to -116 dBm 0.6256 ◙...
  • Page 31 C-357 Level 3 SERVICE MANUAL TX Power Out Test TX TEST Communications Analyzer Setu TX Frequency FM Deviation ◙ Select TX TEST button from the 11.58 834.99 Analog Screen Control panel AF Freq ◙ PWR is measured in dBm TX Power 26.78 Set Frequency Measurement to 1.0000...
  • Page 32 C-357 Level 3 SERVICE MANUAL TX Frequency Error Test Communications Analyzer TX TEST Setu TX Frequency FM Deviation ◙ Select TX TEST button from the 11.58 834.99 Analog Screen Control panel ◙ PWR is measured in dBm AF Freq TX Power ◙...
  • Page 33 C-357 Level 3 SERVICE MANUAL TX Modulation Deviation Limiting Test Communications Analyzer TX TEST Setup TX Frequency FM Deviation ◙ Select TX TEST button from the 11.58 834.99 Analog Screen Control panel ◙ PWR is measured in dBm AF Freq TX Power ◙...
  • Page 34 C-357 Level 3 SERVICE MANUAL TX SAT Deviation Test TX TEST Communications Analyzer Setu TX Frequency FM Deviation ◙ Select TX TEST button from the 1.958 834.99 Analog Screen Control panel AF Freq ◙ PWR is measured in dBm TX Power 26.78 ◙...
  • Page 35 C-357 Level 3 SERVICE MANUAL TX ST Deviation Test TX TEST CommunicationsAnalyzer Setup: TX Freq Error FM Deviation 4.07 ¢Ã Select TX TEST button from the 11.58 Analog Screen Control panel TX Power AF Freq ¢Ã PWR is measured in dBm 26.78 ¢Ã...
  • Page 36 C-357 Level 3 SERVICE MANUAL TX FM Hum and Noise Test DUPLEX TEST CommunicationsAnalyzer TX Freq Error FM Deviation Setup: 8.01 4.07 ¢Ã Select DUPLEX TEST button from the Analog Screen Control panel TX Power AF Freq ¢Ã PWR is measured in dBm 26.78 1.0000 ¢Ã...
  • Page 37 C-357 Level 3 SERVICE MANUAL Connections for performing Tests (CDMA IS-2000) The diagram below shows the recommended connections for testing. A variety of communications analyzers may be used. Refer to the manufacturer’s user manual for proper setup before starting test Connections for Testing Agilent 8960 SERIES 10 E5515C MEAS...
  • Page 38 C-357 Level 3 SERVICE MANUAL Set up for CDMA call & Making CDMA Call Agilent 8960 SERIES 10 E5515C Call Setup Screen Active Cell Operating Mode 1. Select the system type Call Control Call Parms Active Cell - 55.00 dBm/ 1.23MHz Mobile Station Information System Type Cell Band...
  • Page 39 C-357 Level 3 SERVICE MANUAL Making a Receiver Sensitivity Measurement Measurement/ Instrument Screen Frame Error Rate Call Control Call Parms Frame Confidence Error 0.00% Pass Rate System Type Rcvr Power Ctrl Setup Frame Error Co unt: Auto Frames Tested : 10000 AWGN Power 1.Press Measurement selection...
  • Page 40 C-357 Level 3 SERVICE MANUAL CDMA Transmitter Tests Call Setup Screen Waveform Quality:Numeric Rho Call Control Call Parms Waveform 1.Press Measurement Selection - 55.00 Frenquency Error Quality Setup - 3.5 Hz 0.9968 dBm/ 1.23MHz Select Waveform Cell Band Time Erro r: 0.43 us Numeric Rho US cellular...
  • Page 41 C-357 Level 3 SERVICE MANUAL CDMA Code Domain Power +Noise 1.Press Measurement Selection Measurement/ Instrument Screen Call Control Call Parms key and Select Waveform Quality:Code Domain Power+Noise Waveform - 55.00 Quality Setup Waveform Quality +Code Domain Ref 0.00 d B dBm/ 1.23MHz 5.00 d B/...
  • Page 42 C-357 Level 3 SERVICE MANUAL CDMA Code Channel Time/ Phase Error Measurement/ Instrument Screen Call Control Call Parms Code Channel Time/ Phase Error - 55.00 Code Time/ Phase Error Setup Ref 0.00 ns dBm/ 1.23MHz Mark Position 1.Press Measurement Selection 5.00 Cell Band US cellular...
  • Page 43 C-357 Level 3 SERVICE MANUAL CDMA Average Power & Channel Power 1.Press Measurement Measurement/ Instrument Screen Selection key and Select Digital Average Power Call Control Call Parms Digital Average - 104 Digital Average Power & Power Setup Digital Average Power dBm/ 1.23MHz Cell Band Channel Power ,respectively...
  • Page 44 C-357 Level 3 SERVICE MANUAL FER with AWGN Tests 1.Press Measurement Measurement/ Instrument Screen Selection key and Select Frame Error Rate Call Control Call Parms - 55.00 Fram Error Rate Confidence dBm/ 1.23 MHz Frame Error 0.00% Pass Rate Setup System Type Measurement Frame Erro r Co unt:...
  • Page 45 C-357 Level 3 SERVICE MANUAL Circuit Description Receiving Section The receiver section occupies a frequency band of 869MHz∼ 894MHz. The Cellular receive signal is amplified by the RFR6120 LNA. The cellular path consists of a four-stage variable-gain LNA, an external RF filter with single-ended input and differential output, a pair of RF-to-baseband inputs (configured differentially with two-stage gain adjustments).
  • Page 46 C-357 Level 3 SERVICE MANUAL Transmitting Section The MSM provides I and Q differential baseband signals (FM or CDMA) to the RFT6102 IC via the proprietary analog interface. The analog input signals are amplified and applied to the upconverter mixers. A single upconverter plus RF path supports the Cellular band.
  • Page 47 C-357 Level 3 SERVICE MANUAL Baseband Section Antenna MSM6050 VCTXO Mobile Station Modem UART1 19.2 MHz Connectivitily UART1/ R- UIM TEST/ DEBUG System UART3/ USB/ R- UIM ADCs R- UIM PM6000 RFR6120 Duplexer ADCs RAM,ROM, LCD display & Peripherial Microprocessor ARM7TDMI Bus Address/ Circuits...
  • Page 48 C-357 Level 3 SERVICE MANUAL The logic part consists of MSM6050 Station diagnostic tests during manufacturing process. • ARM Microprocessor & Memory Interface The serial data port is a UART channel. The The MSM6050 device contains an embedded UART processes both the transmit and the ARM7TDMI microprocessor and supporting receive data, and interrupt control circuits, a peripherals.
  • Page 49 C-357 Level 3 SERVICE MANUAL tone pairs on the RINGER pin. The Ringer GPIO pins have alternate functions supported generation circuit produces and sums two on them. The alternate functions include USB different user-programmable frequencies. interface, additional RAM, ROM, general- Single tones generated...
  • Page 50 C-357 Level 3 SERVICE MANUAL The Audio Section of MSM6050 amplifier and MICFBN and MICFBP are the feedback outputs. In addition to the gain stage, the circuit contains a highpass filter that suppresses low frequencies. • Receive Path Processing The MSM6050 device includes the capability of adding a portion of the Tx audio into the receive path.
  • Page 51 C-357 Level 3 SERVICE MANUAL The Power Section VREG_xxxx ON Push switch In 20ms The Pin of KPWR_ON of PM6000 goes MSMP,MSMC and MSMA are always ON (Power key) Others are controlled by SBI. to LOW from HIGH MSMA andTCXO are ON for default Min.10ms After 2 BCLK (default to TCXO CLK)
  • Page 52 Known good Parts List should be available to be used for troubleshooting by substitution, and for Parts List of defective parts. Defective circuit boards should be for-warded to the appropriate MOTOROLA service facility for repair. Refer to the “C357 Parts List” section of this manual for a list of part descriptions and part numbers. Troubleshooting The troubleshooting chart in page , “Assembly Replacement Level Trouble-shooting and Repair...
  • Page 53 C-357 Level 3 SERVICE MANUAL Logic Part Troubleshooting Logic Trouble Shooting Start Power On? Trouble Shooting 1 LCD/Back Light On? Trouble Shooting 2 Key Tone On? Trouble Shooting 3 Speaker On? Trouble Shooting 4 Vibration On? Trouble Shooting 5 Charging On? Trouble Shooting 6 Page 53 of 107 Confidential &...
  • Page 54 C-357 Level 3 SERVICE MANUAL Troubleshooting1 Power On Error Is the battery 1. Reinstall the battery installed properly? Is the voltage of battery 1. Charge the battery more than 3.2V? Is the output voltage of Q4 or Q2 little less than 1.
  • Page 55 C-357 Level 3 SERVICE MANUAL Troubleshooting2 LCD / Back Light Error Press any key button Back light error Any LCD error? 1. Check the peripheral circuit of U4 1. Check the peripheral Is the output voltage of U6 2.5V? circuit of U6 Does U4 operate properly? Does U4 operate...
  • Page 56 C-357 Level 3 SERVICE MANUAL Troubleshooting3 Key Data Input/ Key Tone Error Press any key button Key button display error Key tone error? 1. Replace LCD module Is the ear piece 1. Reinstall the ear piece installed properly? Does LCD module have no error? 1.
  • Page 57 C-357 Level 3 SERVICE MANUAL Troubleshooting4 Melody Error Press the right arrow key or the left arrow key several times No melody? Is the ear piece 1. Reinstall the speaker installed properly?? 1. Reinstall the zebra of Is the zebra of the speaker the speaker installed properly? 1.
  • Page 58 C-357 Level 3 SERVICE MANUAL Troubleshooting5 Vibration Error Press the right arrow key or the left arrow key several times No vibration? 1. Check the vibrator Does the vibrator operate properly? 2. replace it if necessary 1. Replace D240 Hasn’t D240 broken down? Page 58 of 107 Confidential &...
  • Page 59 C-357 Level 3 SERVICE MANUAL Troubleshooting6 Battery Charging Error Is the voltage of the charger more than 4.8V 1. Change the charger and less than 6.8V? Is the resistance of F1 1.Replace F1 less than 1Ohms? Does U205 and Q200 1.
  • Page 60 C-357 Level 3 SERVICE MANUAL RF Part Troubleshooting RF Part Trouble Shooting Start Troubleshooting 7 CDMA CDMA TX Power? Troubleshooting 8 Page 60 of 107 Confidential & Proprietary...
  • Page 61 C-357 Level 3 SERVICE MANUAL Troubleshooting7 CDMA Ready Error RX Signal Level – 75 dBm. Does C oscillate 1. Check peripheral in 19.2MHz circuitry of U801 Is U203 pin7 Output 1. Check peripheral Voltage of 2.85V outputted? U 203 circuitry of Is U7 pin 6 1.
  • Page 62 C-357 Level 3 SERVICE MANUAL Troubleshooting8 C D M A TX Pow er R X Si gnal Level - 104dBm . DoesTX 1. Check peripheral operate normally? circuitry of U7, U601 1. Check peripheral Does U203 pin19 output circuitry of U203 Voltage output 2.85V? 1.
  • Page 63 C-357 Level 3 SERVICE MANUAL Service Diagram C357 Power Management PM_MSMP PM_MSMC PM_MSMA (2.82V) (1.87V) (2.6V) PWR_ON PS_HOLD R205 VREG_RFTX PM6000 (2.85V) (U203) C212 C213 VREG_RFRX (2.85V) VPH_PWR VREG_TCXO (3V) VREG_SYNT (2.85V) ON_SW_SEN/ When the PS_HOLD signal from the MSM is low the PM6000 IC is in one of its off states. Under this condition, the power-on circuits continually monitor three events that could trigger a power-on Three events are SMPL, Keypad power_on, External supply detection.
  • Page 64 C-357 Level 3 SERVICE MANUAL MSM6050 PIECE TRK_LO_ADJ TX_AGC_ADJ PM_MSM PM_MSMP A[01:20] C341 AUXIN MICFB R315 TCXO_MSM SLEEP_CLK MICIN/ C342 RESIN/ RESOUT/ C340 SBST MICOUT SBDT SBCK MSM6050 R314 AUX_SBST AUX_SBDT AUX_SBCT R313 RX_IP U300 RX_IN R312 RX_QP RX_QN C329 FM_LNA_RANGE MICIN TX_IP...
  • Page 65 C-357 Level 3 SERVICE MANUAL Memory A[01:23] D[00:15] VREG_MSMC (1.867V) VREG_MSMP (2.817V) VREG_MSMP (2.817V) (MEMORY) ADV# P_MODE VREG_MSMP (2.817V) P_MODE Page 65 of 107 Confidential & Proprietary...
  • Page 66 C-357 Level 3 SERVICE MANUAL Audio Configuration & Schemetic C341 MICBIAS PH_MIC PH_MIC/ MICFB R315 MICIN/ C342 C340 MICOUT MSM6050 R314 R313 U300 R312 C329 MICIN C328 MICOUT/ MICFB/ C327 R311 C319 C301 R102 C313 C325 The Quality of audio is concerned with C329 and C342. The Level of audio is concerned with C327,C328,C240 and C341.
  • Page 67 C-357 Level 3 SERVICE MANUAL Microphone and Earphone Interface The MICBIAS output pin is designed to provide 1 mA of current at 1.8 Volts DC. The output power for the differential EAR1 output is typically 35 mW for a full-scale +3 dBm0 sine wave into a 32 OHM speaker.
  • Page 68 C-357 Level 3 SERVICE MANUAL LED and LCD B/L Driver VPH_PWR D112 LED_BRIGHT U106 LED3_IN (LCD_B/L) LED4_IN ISET D111 U106, LM2794 is a charge pump IC, that can double the input voltage, the VPH_PWR. C135 and C137 are used for doubling voltage, C138 and C134 for stabilizing the input or output voltage. U106 supplies constant current to 4 LEDs, two of them are keypad LEDs and the others are for LCD B/L, and its current is set by the resistor, R124.
  • Page 69 C-357 Level 3 SERVICE MANUAL PLD and LCD Connector PLD_LCD_SI D00~D07 PLD_LCD_SCK PLD_LCD_RS LCD_CS RESOUT/ RESET_OUT/ PLD_BUSY PLD_LCD_CS PM_MSMC PLD_2.5V VPH_PWR PLD_EN U4, XC2C32-6CP56I is a PLD than can make parallel data to serial data, because the main LCD supports serial data only. U6, XC6209B252DR is a LDO regulator and it generates 2.5V that is used for driving PLD.
  • Page 70 C-357 Level 3 SERVICE MANUAL Vibrator Circuits VPH_PWR MOTOR_ON D240, KDS160 and C240 are used for protecting unstable voltage that may caused by vibrating. The vibrator rotates by 10300±1500 rpm and the average current for the vibrator is about 130mA and the peak current is 175mA.
  • Page 71 C-357 Level 3 SERVICE MANUAL Mini USB Connector PM_MSMP(2.85) USB_DATA USB_D+ U310 & CONTROLS USB_D- USB_PWR U310, ISP1105 is a USB driver IC that can translator from original USB data format of computers to another USB data format of QUALCOMM chips and can translate reversely, too. U102, STF203-22 is used for ESD protection.
  • Page 72 C-357 Level 3 SERVICE MANUAL Power Jack VCHARGER Q200 PM_MSMP(2.85) EXT_DC ADAPTOR_ID Q1, SI5435DC is used to protect negative voltage, If negative voltage were to flow in, The voltage of Q1’s gate would get higher than those of Q1’s drain, so the current cannot pass through Q1. F1, FCC16-501AB-TP is a simple fuse, that is used for over-current protection, Over-current will burn it and will not recover until new one is replaced.
  • Page 73 C-357 Level 3 SERVICE MANUAL Audio Jack HS_MIC REMOTE_SEND/ PM_MSMP(2.85) EAR_20 Spkr EARJACK_DET/ The phone knows that an earjack is connected, by the voltage of EARJACK_DET/ line turning low. Q3, 2SJ347 and resistors around Q3 make the phone know that remote-send key is pressed or not.
  • Page 74 C-357 Level 3 SERVICE MANUAL Inner Charger PM6000 (U203) ICHARGEOUT ICHARGE CHG_CNTB EXT_DC Q202 VPH_PWR R240 BATTERY The PM6000, U203 has a inner charger circuit that can charge a Li-ion or Li-polimer battery with methods such like trickle charge, constant current charge, constant voltage charge and pulse charge.
  • Page 75 C-357 Level 3 SERVICE MANUAL ADC_PA_TEMP T650 ADC_PA_TEMP R651 R650 2.85V_RX The PM6000, U203 makes the range of ADC voltage, 0V~2.5V to 0~1023, but generally 2 LSB is abandoned and PM uses not all 10bit-ADC value but 8bit-ADC value only. Page 75 of 107 Confidential &...
  • Page 76 C-357 Level 3 SERVICE MANUAL RFR6120 SBDT VREG_RFR SBCK SBST CLNA OUT TCXO VREG_RFR R_BIAS RFR6120 RX_IP VREG_RFR RX_IM RX_QP RX_QM CELL INM The RFR6120 IC provides the Zero-IF receiver signal paths for Cellular handsets. The Cellular path begins with a four gain-state LNA, followed by the external Cellular bandpass filter that provides transformation between the single-ended 50-Ohm LNA output and the differential second-stage amplifier input.
  • Page 77 C-357 Level 3 SERVICE MANUAL support AMPS. An LO input pin (LO_IN) is driven by the external VCO. All VCOs, the on-chip Cellular-CDMA VCO and external AMPS(CDMA and AMPS) VCO, are tuned via the RFT6102’s Rx PLL when active, and share an output buffer amplifier to deliver the PLL feedback signal to the RFT device.
  • Page 78 C-357 Level 3 SERVICE MANUAL RFT6102 VREG_RFT V_RFTX VCO TUNE TX_QP TX_QM VREG_SYNT TX_IP VREG_SYNT RFT6102 UHF LO TX_IM V_RFTX ADC REF VREG_SYNT VREG_SYNT VREG_SYNT VREG_SYNT The RFT6102 IC provides the Zero-IF transmitter signal path, from analog baseband to RF driver amplifiers, for Cellular with AMPS handsets.
  • Page 79 C-357 Level 3 SERVICE MANUAL employing Tx power reduction features (such as selective circuit power-down, gain control, and transmit puncturing) to extend handset talk-time. Page 79 of 107 Confidential & Proprietary...
  • Page 80 C-357 Level 3 SERVICE MANUAL VCTCXO Circuit C802 C803 VREG_TCXO R801 TCXO U801 TRK_LO_ADJ R803 C804 The Voltage Controlled Temperature Compensated Crystal Oscillator (VCTCXO) provides the reference frequency for all RFIC synthesizers as well as clock generation functions within the MSM6050 IC.
  • Page 81 C-357 Level 3 SERVICE MANUAL RX SAW Filter CLNA_OUT FIL701 CELL_INM C719 L703 L704 C720 CELL_INP Page 81 of 107 Confidential & Proprietary...
  • Page 82 C-357 Level 3 SERVICE MANUAL A Cellular RF filter is located between its LNA and mixer. Insertion loss is important, but not as critical as losses before the LNA. The most important parameters of this component include: Out-of-band rejection or attenuation levels, usually specified to meet these conditions: - Tx-band leakage - Phase and amplitude balance Page 82 of 107...
  • Page 83 C-357 Level 3 SERVICE MANUAL POWERAMP DUPLEXER C602 C643 U601 High Gain Mode : 0.2V Low Gain Mode : 2.1V PA_R1 C632 L601 U602 FIL601 C634 C631 VPH_PWR 2.8V_RFT_TX PA_ON RFT6102 This is a key component in the transmitter chain and must complement the RFT6102 IC; jointly they dominate the transmitter performance characteristics.
  • Page 84 C-357 Level 3 SERVICE MANUAL The transmitter RF filter rejects out-of-band spurious signals and RFT6102 broadband noise to assure compliance with the applicable emissions standards. Important filter parameters include: Insertion loss – critical to the overall gain and output power objectives of the transmitter. Out-of-band rejection or attenuation levels Receiver passband –...
  • Page 85 C-357 Level 3 SERVICE MANUAL DUPLEXER CIRCUIT High Power Dectector R516 ADC_HP_DET L520 L504 FIL501 VREG_RFTX L520 TX POWER AMP RX LNA A duplexer splits a single operating band into receive and transmit paths. Important requirements: Insertion loss : Cellular Tx = 2.3 dB, Cellular Rx = 2.7 dB. Out-of-band rejection or attenuation Rx-band isolation : 45 to 50 dB.
  • Page 86 C-357 Level 3 SERVICE MANUAL Appendix A. Disassembly Opening Housing : Step 1 : Press down on the FRONT CASE release button at the top of your phone with the right thumb, holding up the ANTENNA with the left thumb and pull the top of the phone's BACK CASE to release it.
  • Page 87 C-357 Level 3 SERVICE MANUAL Step 3 : Push out the hooks of the corner in the bottom side of the FRONT CASE and pull out the ENDO BACK to separate the ENDO BACK from the FRONT CASE. Step 4 : Remove the KEYPAD. Page 87 of 107 Confidential &...
  • Page 88 C-357 Level 3 SERVICE MANUAL Board Removal : Step 1 : Unscrew all 4 screws from the ENDO BACK with using toxe driver T6. Step 2 : Open the hooks on the mid area of the ENDO BACK and pull out the PCB to separate it from ENDO BACK.
  • Page 89 C-357 Level 3 SERVICE MANUAL B. Replacement Part Page 89 of 107 Confidential & Proprietary...
  • Page 90 C-357 Level 3 SERVICE MANUAL C. C357 Part List Ass'y Pantech PN Description Q'ty C357 Main B'D ASS'Y Mechanical ASS'Y PACKING MAIN B'D ASS'Y MAIN B'D_BOTTOM Pantech PN Description Vendor PN Q'ty Location J200 3041000020 BATTERY CONNECTOR DL-4P031002 3721100067 DC JACK CONNECTOR...
  • Page 91 C-357 Level 3 SERVICE MANUAL 3330600062 KEYPAD LED QSMW-C269 D111,D112 3530500028 VCTCXO KT21A-DCV28B-19.200M-T U801 3411200005 THERMISTOR TH05-3T103F/10kΩ T650 3114000048 P-CH FET SI2323DS Q2, Q4, Q200, Q201 3100500019 SWITCHING DIODE KDS160E D240 3104200026 TVS DIODE ESDA6V1-5P6 D125 3104200031 TVS DIODE LC0408FC05C D124 3110100051 PNP TRANSISTOR...
  • Page 92 C-357 Level 3 SERVICE MANUAL 3200100285 USB CONTROLLER ISP1105WHBCC16 U310 3200100492 XC6209B252DR 3200100292 XC6204B302DR 3721100095 EAR JACK AJR45-5K2010 J401 3011400030 MOTOR MR-2300A J202 3114000053 MOSFET 2SJ347 3012000105 MAIN PCB 2120100002 CAPACITOR GRP155F50J1R0CZ01E/1pF C501 2122290001 CAPACITOR GRP1555C1H2R2CZ01E/2.2pF C602,C637, C719, C720 2128080001 CAPACITOR GRP1555C1H8R0DZ01E/8pF 2121500001...
  • Page 93 C-357 Level 3 SERVICE MANUAL C2,C3,C5,C9,C10,C12,C22,C34,C35,C38,C39,C51,C53,C54,C58,C59 ,C60,C61,C62,C121,C203,C204,C206,C208,C210,C214,C232,C240 2121040003 CAPACITOR GRP155F51C104ZA01E/0.1uF ,C301,C302,C311,C313,C314,C317,C318,C319,C321,C322,C324, C325,C326,C328,C329,C330,C331,C332,C340,C342,C343,C369, C413 ,C425,C429,C701,C703,C705, C708,C712,C718 2126803002 CAPACITOR GRP155F50J684ZD02E/0.68uF C304 2121050008 CAPACITOR GRP155F50J105ZD02E/1uF C631, C634, C803 2121050020 CAPACITOR GRM188R61C105KA12D/1uF C1,C7,C8,C134,C135,C137,C138,C219,C220,C241,C242 2123350001 CAPACITOR GRM219F51A335ZA01D/3.3uF C209 2124750010 CAPACITOR GRM219R60J475KE01D/4.7 uF C218 2121890013 CAPACITOR GRM21BR60J106KE19L/10uF C211,C212,C213,C215,C601,C704,C710,C711 CAPACITOR...
  • Page 94 C-357 Level 3 SERVICE MANUAL 2526808005 RESISTOR MCR01MZSJ6R8/6.8Ω 2521009001 RESISTOR MCR01MZSJ100/10Ω R26, R710 2524999005 RESISTOR RC1005F49R9CS/49.9(1%) R238 2525109001 RESISTOR MCR01MZSJ510/51Ω 2521000001 RESISTOR MCR01MZSJ101/100Ω R20,R304,R704,R803 2529109004 RESISTOR RC1005F111CS/110Ω(1%) R501 2521200001 RESISTOR MCR01MZSJ121/120Ω R124 2523300001 RESISTOR MCR01MZSJ331/330Ω R203 2521001001 RESISTOR MCR01MZSJ102/1kΩ R3,R34,R302,R401,R701 2521520001 RESISTOR RC1005F152CS/1.5k(1%)
  • Page 95 C-357 Level 3 SERVICE MANUAL 2521003010 RESISTOR RC1005F104CS/100kΩ (1%) R651 2520184001 RESISTOR MCR01MZSJ184/180kΩ R311,R315 2522003002 RESISTOR MCR01MZSJ204/200kΩ R205 2520244001 RESISTOR MCR01MZSJ244/240kΩ 2520514001 RESISTOR MCR01MZSJ514/510kΩ R313 2521500901 RESISTOR RLC32R150FTP/0.15Ω (1%) R240 2521508001 RESISTOR MCR03EZHJ1R5/1.5Ω R405,R406 RESISTOR OPEN R28,R211,R233,R301 6120029400 SHIELD CASE RX SH101 6120029500 SHIELD CASE TX...
  • Page 96 UV COATING 6268022300 TAPE WINDOW LCD NITTO 5000 0.17t PC LEXAN ML6339R - 70652, 6210003600 LOGO MOTOROLA UV COATING 6268029200 TAPE LOGO MOTOROLA NITTO 5000 0.17t 6220012000 WINDOW LCD PC OQ1030, Silkscreen backside 6220016500 ESCUTCHEON Epoxy , Silkscreen backside 6268029300 TAPE ESCUTCHEON NITTO 5000 0.17t...
  • Page 97 C-357 Level 3 SERVICE MANUAL 6201066200 BACK ENDO PC LEXAN 141R - 70531 6120023700 DOME SHEET 6120024200 BATTERY SPRING "L" SMC50 0.2t 6120024300 BATTERY SPRING "R" SMC50 0.2t 6215010800 KNOB SIMCARD PC LEXAN 141R 6123001700 KNOB SPRING SUS304WPB 6110002400 HOLDER SPEAKER SUS 0.2t 6253013500 CUSHION HOLDER SPEAKER...
  • Page 98 C-357 Level 3 SERVICE MANUAL Page 98 of 107 Confidential & Proprietary...
  • Page 99 C-357 Level 3 SERVICE MANUAL D. Audio Test Configuration H P8 9 2 4C FUNCTION INSTRUMENT STATE CDMA CALL CONTROL DATA USER CDMA SCRNS DATA FUCTION Aud io Gen erato r ANALOG SCRNS VOLUME VOLUME SQUELCH AUDIO OUT POWER AUDIO IN DUPLEX ANTENNA IN RF IN/OUT...
  • Page 100 C-357 Level 3 SERVICE MANUAL E. C357 RF Block (Zero IF) Diagram RFR6120 RX RF SAW SF16-0881M5UB01 RX_IP RX_IM QUADRATE DOWNCONVERTER RX_QP RX_QM LO GENERATION 869.04~893.97 MHz &DISTRIBUTION CONGROL CIRCIUTS CELL 1720.87~1778.37MHz AMPS VCO DUPLEXER VC-2R8A81 856145 19.2MHz LOOP LOOP...
  • Page 101 C-357 Level 3 SERVICE MANUAL F. Board Location Map Page 101 of 107 Confidential & Proprietary...
  • Page 102 C-357 Level 3 SERVICE MANUAL G. Schematics Page 102 of 107 Confidential & Proprietary...
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  • Page 107 C-357 Level 3 SERVICE MANUAL Page 107 of 107 Confidential & Proprietary...