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Motorola TDMA T2290 Service Manual
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Motorola TDMA T2290 Service Manual

Motorola TDMA T2290 Service Manual

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Service Manual
Level 3
Release 1
™
DIGITAL WIRELESS TELEPHONE
TDMA T2290/T2297

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Summary of Contents for Motorola TDMA T2290

  • Page 1 Service Manual Level 3 Release 1 ™ DIGITAL WIRELESS TELEPHONE TDMA T2290/T2297...
  • Page 2 Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any li-...

  • Page 3: About This Manual

    When in the vicinity of con- gional Customer Support Manager for more struction work, look for and observe signs information about MotorolaÕ s repair capa- cautioning against mobile radio transmis- bilities and policy for in-warranty and out- sion. If transmission is prohibited, the cellu- of-warranty repairs in your region.

  • Page 4: Portable/Mobile Telephone Use And Driving

    About This Manual TDMA T2290/T2297 lar telephone must be turned off to pre- vent any transmission. In standby mode, the mobile telephone will automatically transmit to acknowledge a call if it is not turned off. All equipment must be properly grounded according to installation instructions for safe operation.

  • Page 5: Specifications

    9 kHz deviation (nom.) @ 97 dB SPL input @ 1 kHz Receive Sensitivity -116 dBm for 12 dB SINAD (C-MSG weighted) Adjacent and Alternate -16 dB @ +30 kHz, -60 dB @ + 60 kHz Channel Desensitization Greater than 65 dB ©2000 Motorola, Inc.
  • Page 6 About This Manual TDMA T2290/T2297 Table 3. DAMPS System Function Specification π /4DQPSK Modulation Type Frequency Stability + 200 Hz Duty Cycle 32.3% Error Vector Magnitude Error Vector Magnitude [Digital] 12.5% (π /4DQPSK mode) Transmit Audio Sensitivity TOLR of –46 dB nominal...

  • Page 7: Table Of Contents

    TDMA (Time Division Multiple Access) ......................18 Digitization and TDMA ..........................18 Digitization of Voltage ........................... 19 Conventional Radio ............................19 TDMA Radio ..............................20 Accessories ..........................21 TDMA EASY NAM Programming ....................23 Introduction ..........................23 User Mode Programming ......................23 Programming Sequence ......................24 ©2000 Motorola, Inc.
  • Page 8 Table of Contents TDMA T2290/T2297 Enter Programming Mode ..........................24 Enter Security Code ............................. 24 Enter Phone Number ........................... 24 Programming a second No........................... 24 If you make a mistake ..........................24 TDMA Test Mode NAM Programming ..................25 Introduction ..........................25...
  • Page 9 Introduction ..........................59 Mechanical Explosion ......................59 General Description ........................61 Antenna Circuit ........................61 RX Front End ...........................61 NADC IC ..........................61 TX Operational Description .....................62 Power Amp Integrated 800 MHz or 1900 MHz IC ..............62 Analog TX Audio Processing ....................63 ©2000 Motorola, Inc.
  • Page 10 Table of Contents TDMA T2290/T2297 Digital TX Audio Processing .....................63 DSP Lucent 1629 ........................63 Stuart IC ...........................64 GCAP II ............................64 Section B Service Diagrams ........................B1 Antenna Circuit ........................B3 Front End IC(U10) ........................B5 ZIFSYNTH(U110) ........................B7 VCO ............................B9 TX Offset Oscillator .......................

  • Page 11: Cellular Overview

    (395 AMPS / 1185 NAMPS): 717 - 799 NOTE In NAMPS applications, each AMPS voice channel provides space for three NAMPS voice channels. Digital cellular multiplexes voice channels to allow for the possibility of several additional conversations on a single channel. ©2000 Motorola, Inc.

  • Page 12: Control (Data) Channels

    Cellular Overview TDMA T2290/T2297 Introduction are defined in Figure 1. The cellular radio frequency spectrum has been divided by the FCC into two equal seg- Originally the B Band was assigned to the ments or bands to allow two independent cel-...

  • Page 13: Voice Channels

    Voice channels are primarily used for con- with a total of 333 channels assigned to each versation, with signaling being employed as carrier. Prior to 1987 the FCC had allocated necessary to handle cell-to-cell hand-offs, 312 channels to voice (voice, DTMF, or data) ©2000 Motorola, Inc.
  • Page 14 NAMPS telephones. But one thing remained constant, there were 21 control channels for each carrier. In 1992, when Motorola tested its TDMA digi- tal product, digitizing three communication links on each of 395 voice channels, one thing remained constant: there were still 21 con- trol channels for each carrier.

  • Page 15: Analog Cellular

    Figure 3. Channel Assignments Refer to the Electronic Industries Association standard EIA-553 for a thorough discussion of AMPS signaling protocol, or to Motorola’ s NAMPS Air Interface Specification for NAMPS. The tones used in AMPS signaling are Sig- naling Tones and Supervisory Audio Tones.

  • Page 16: Sat (Supervisory Audio Tone) And Dsat (Digital Sat)

    Cellular Overview TDMA T2290/T2297 Analog Cellular the complement of the assigned DSAT. voice channel, it also informs the mobile of the SAT frequency or DSAT vector to expect on the new channel. The returned (D)SAT SAT (Supervisory Audio Tone) and DSAT...

  • Page 17: Analog Cellular Signal Summary (Amps And Namps)

    SAT in AMPS signaling. Figure 5. AMPS Deviation in kHz AMPS Deviation in kHz Control AMPS Voice Channels Channels ±14 ±12 ±10 ± 8 Audio Audio Data Data Signal ± 6 Data Tone ± 4 ± 2 ©2000 Motorola, Inc.

  • Page 18: Going Into Service

    Cellular Overview TDMA T2290/T2297 Analog Cellular Total deviation of two or more signals is cu- mulative. Step 5. Decision point. Can the overhead message from the strongest control channel be decoded? If not, go to Going into Service step 6. If it can be decoded go to step 8.*...
  • Page 19 Note: In order to turn off the NoSvc light, the overhead message stream 11. Idle [Rescan must have been decoded. after 5 minutes.] In those telephones with Motorola Enhanced Scan, more than two control channels are sampled before proceeding to step 12. ©2000 Motorola, Inc.

  • Page 20: Placing A Call (Mobile To Land Or Mobile To Mobile)

    Cellular Overview TDMA T2290/T2297 Analog Cellular phone then transmits data at the rate of 10 Placing a Call (Mobile to Land or Mobile to kilobits per second on the control channel to Mobile) notify the switch of its mobile identification...

  • Page 21: Receiving A Call (Land To Mobile)

    SAT (DSAT) to the cellular telephone. The cellular telephone tunes to the voice chan- nel, verifies the presence of the proper SAT frequency (DSAT message) and transponds the signal back to the cell site. At the cell ©2000 Motorola, Inc.
  • Page 22 Cellular Overview TDMA T2290/T2297 Figure 8. Land to Cellular Telephone Call Processing Switch / Cell Site Landline Network Cellular Telephone DATA The landline caller dials the The cellular telephone is Overhead data is sent out FOCC cellular telephone number. tuned to the on the control channels.

  • Page 23: Power Steps

    Otherwise the equipment telephone’ s signal strength. The site with should employ an error correction protocol. the strongest signal will be the site to which the call will be handed to if there are avail- able voice channels. ©2000 Motorola, Inc.
  • Page 24 Cellular Overview TDMA T2290/T2297 Figure 9. Cell Site Handoffs Switch / Cell Site Cellular Telephone Landline Network Conversation in progress. Conversation in progress. VOICE + (D)SAT The voice path is unmuted. The voice path is unmuted. FOVC & REVC The cell site monitors the cellular telephone's signal strength.

  • Page 25: Call Termination

    The cellular telephone rescans the access / paging channels DATA Overhead data sent out on for the strongest signal and FOCC the control channel. decodes data. The cellular & telephone responds to RECC requests for data. ©2000 Motorola, Inc.
  • Page 26 Cellular Overview TDMA T2290/T2297 ©2000 Motorola, Inc.

  • Page 27: Digital Cellular

    FDMA (Frequency Division Multiple person’ s vocal cords into varying voltages. If Access) an oscilloscope probe is connected to the out- put from a microphone, a varying voltage Frequency Division Multiple Access Figure 11. Digitizing Voice Time ©2000 Motorola, Inc.

  • Page 28: Tdma (Time Division Multiple Access)

    Cellular Overview TDMA T2290/T2297 Digital Cellular line, such as that shown in the accompany- audio. ing illustration, will be produced. TDMA (Time Division Multiple Access) If the varying voltages are sampled at some Time Division Multiple Access (TDMA) to- rate, the instantaneous voltages can be quan- day provides a times-3 increase in the num- tified.

  • Page 29: Digitization Of Voltage

    The quencies. The RF energy is beat against the result is a binary string representing volt- output from a local oscillator to produce a ages. We now have digital voice. difference frequency called the intermediate ©2000 Motorola, Inc.

  • Page 30: Tdma Radio

    Cellular Overview TDMA T2290/T2297 Digital Cellular frequency. The IF is processed in the IF strip, which provides filtering and amplification. A discriminator retrieves audio from the IF and the varying voltages of the audio are used to drive a speaker...

  • Page 31: Accessories

    Headset with Boom Microphone (Mono) ..............SYN8146A BELT CLIP o Universal Belt Clip (spinning)..................SYN7158A o Universal Belt Clip (locking) ..................SYN8092A PHONE CLIPS o Shark “ Z Look” Phone Clip ..................SYN8523A o Shark “ R Look” Phone Clip ..................SYN85234A ©2000 Motorola, Inc.
  • Page 32 Accessories TDMA T2290/T2297 BATTERY DOORS o Battery Door - Z Look (Black) ...................SHN7282A o Battery Door - R Look (PUTTY GRAY) ..............SHN7476A o Battery Door - R Look (GUNMTL BLACK) .............SHN7477A o Battery Door - R Look (METALLIC ORANGE) ............SHN7478A BATTERIES o AAA Long Battery 700 mAh NiMH (Q/A: 3) - English ..........SNN5518A...

  • Page 33: Tdma Easy Nam Programming

    Manual Test Mode using the 32# command (erasing all repertory memory and initializing counters). Some models may be available with a “ User Mode NAM Programming Manual” which describes the entry key sequences and the ©2000 Motorola, Inc.

  • Page 34: Programming Sequence

    TDMA Easy NAM Programming TDMA T2290/T2297 Programming Sequence Programming Sequence Press , carrier system ID (from your Cellular Service Enter Programming Mode Ê Provider), . Phone displays " NAM 1 Prog * = Yes # = No". Press . Display prompts for Security Code "_ _ _ _ _ _".

  • Page 35: Tdma Test Mode Nam Programming

    Programming Status Display. Then enter 5 5 #. The phone Single NAM 1, 3, 4, 6, 9 will now be in Step 1 of the NAM. Dual NAM Enable Dual NAM 1, 3, 4, 6 Motorola Confidential Proprietary...

  • Page 36: Nam Data

    TDMA Test Mode NAM Programming TDMA T2290/T2297 NAM Data ferent from Test Mode NAM programming NAM Data steps, and do not include all of the option bits available in Test Mode NAM programming. NAM Data is specified by the system opera- Access to User Mode NAM programming can tor.

  • Page 37: Test Mode Nam Programming Sequence

    Access overload class. Specifies the level of priority assigned to the phone when accessing the system. Assigned by system operator. Systems group ID mark. Specifies how many bits of the system ID are compared during call processing. Assigned by system operator. Motorola Confidential Proprietary...
  • Page 38 TDMA Test Mode NAM Programming TDMA T2290/T2297 Table 7: Test Mode NAM Programming Sequence (con’ t) 000000 Security code. A 6 digit number supplied by the user. This number is used by the user to access or change “ security” features such as the 3-digit unlock code or the service level.
  • Page 39 If the second phone number bit is en- abled, (step 11 C Option Byte bit 6), then steps 1- 6, 12, and 16 are re- peated. To store NAM data press the * key until the ’ is displayed after step 19 Motorola Confidential Proprietary...
  • Page 40 TDMA Test Mode NAM Programming TDMA T2290/T2297 Motorola Confidential Proprietary...

  • Page 41: Manual Test Mode

    Figure 19: “ Connections for PCS Testing” on When the Snd, End, or Clr button is pressed, page 38 shows the recommended test setup. the status information display resumes. The phone remains in Status Display Mode if the # key is pressed momentarily. Motorola Confidential Proprietary...

  • Page 42: Servicing Level

    Manual Test Mode TDMA T2290/T2297 Servicing Level Servicing Level The Servicing Level of Manual Test Mode allows service personnel to manually control operation of a phone by entering commands through the telephone keypad. Parameters such as operating channel, output power...
  • Page 43 0 = enabled 1 = muted Signaling Tone (voice channel) RF Power Level Word Sync Status (data channel) Channel Type Steps 0-7 0 = off, 1 = on/sync acquired 0 = voice channel 1 = data channel Motorola Confidential Proprietary...
  • Page 44 Manual Test Mode TDMA T2290/T2297 Figure 18. Test Mode Status Display (Digital Status Display Line 1 Blank 1900 Channel RSSI Reading Assignment Call Processing Mode 1 = DAMPS half rate, slot 1 800 Channel 2 = DAMPS half rate, slot 2...

  • Page 45: Test Procedures

    Test Procedures Handoffs should be performed between low, Introduction middle, and high frequency channels, such as, 991 (lowest frequency), 333 (middle fre- The phone allows keypad controlled testing quency), and 799 (highest frequency). In digi- of various analog and digital operating pa- tal mode slots 1 &...

  • Page 46: Test Connections

    Test Procedures TDMA T2290/T2297 Test Connections Test Connections Figure 22. Connections for PCS Testing HP83206A 8 3 2 0 6 A T D M A C E L LU L A R A D A P T E R Back View...

  • Page 47: Rf Cable Test

    Out port. At this point you will be get- ting some type of power reading for cable loss. Good range: -.2 dBm through -.8 dBm Bad cable: More than -.8 dBm Motorola Confidential Proprietary...

  • Page 48: Set Up For Analog Call

    Test Procedures TDMA T2290/T2297 Set up for Analog call Set up for Analog call Figure 24. Call Control Screen CALL CONTROL Select CALL CNTL from the To Screen Display Data / Meas Phone : 111-111-1111 Select System type: AMPS Active ESN (dec) : 156-4460397 •...

  • Page 49: Rx Sensitivity Test (Sinad)

    2. Narrow band SINAD can be measured by entering 571# and setting the FM Deviation to 3kHz. Refer to the RX troubleshooting section for radios not within the pass specifications. Motorola Confidential Proprietary...

  • Page 50: Tx Power Out Test

    Test Procedures TDMA T2290/T2297 TX Power Out Test TX Power Out Test Figure 26. TX Test Screen TX TEST Communications Analyzer Setup: FM Deviation TX Frequency 11.58 834.9900 • Select TX button from the Screen Control panel AF Freq Tx Power 27.49...

  • Page 51: Test Mode Commands

    6V level (output will go to the audio port) Test Mode Commands: 11333# Loads synthesizer to channel 122# Set power level to step 2 Turn on transmit carrier The frequency error measured on the communications analyzer must be less than ±1 kHz. Motorola Confidential Proprietary...

  • Page 52: Tx Maximum Deviation Test

    Test Procedures TDMA T2290/T2297 TX Maximum Deviation Test TX Maximum Deviation Test Figure 28. TX Test Screen Communications Analyzer Setup: TX TEST • Select TX button from the Screen FM Deviation TX Frequency 11.58 834.9900 Control panel • PWR is measured in dBm...

  • Page 53: Tx Sat Deviation Test

    Test Set. View FM Deviation for the reading. The transponded peak SAT FM de- viation should be 2 kHz ±200 The demodulated signal on the com- munications analyzer should have an audio frequency of 6000 Motorola Confidential Proprietary...

  • Page 54: Tx St Deviation Test

    Test Procedures TDMA T2290/T2297 TX ST Deviation Test TX ST Deviation Test Figure 30. TX Test Screen TX TEST Communications Analyzer Setup : FM Deviation TX Frequency 7.890 834.9900 • Select TX button from the Screen Con AF Freq trol panel Tx Power 27.49...

  • Page 55: Setting Up For Pcs Tdma Measurements

    US PCS Slot : CALL CNFG 2 Cntrl Order Pwr Lvl : - ANLG MEAS Amplitude SPEC ANL DVCC : - Send SMS -50.0 AUTHEN DIG MEAS ACELP MS Id Voc : - Phone Num 1111111111 More Motorola Confidential Proprietary...

  • Page 56: Setting Up For Pcs Tdma Measurements

    Test Procedures TDMA T2290/T2297 Setting up for PCS TDMA Measurements Setting up for PCS TDMA Measurements Figure 33. DCCH Call Configure II Screen In the MS Capab field select select DCCH CALL CONFIGURE II Num Voice Temperature Compensate MS Capab...

  • Page 57: Set Up For Tdma Call

    If the registration message has been assigned voice channel. received, the Test Set will display registra- The connect annunciator will light if tion data in the upper half of the screen as the mobile properly signals the Test Set. Motorola Confidential Proprietary...

  • Page 58: Maho Measurements

    Test Procedures TDMA T2290/T2297 MAHO Measurements MAHO Measurements Figure 36. DCCH Call Configure Screen Setting up the MAHO measurement DCCH CALL CONFIGURE Country Code DCCH DVCC Select CALL CNFG from the CALL # Neighbors CONTROL’ s To Screen. Set the number of neighbors (up to 6)

  • Page 59: Ber Measurements

    800, 1 = 1900) BER should be displayed. Set power level to step 2 (122#) Turn on transmitt carrier (05#) The BER measured on the communications analyzer must be less than or equal to 3%. Motorola Confidential Proprietary...

  • Page 60: Tx Power Measurements

    Test Procedures TDMA T2290/T2297 TX Power Measurements TX Power Measurements Figure 38. Digital Measurements Screen Digital TX Power Out Test Procedure DIGITAL MEASUREMENTS DTC Meas Make sure the Test Set is in Active Avg Power Average Power 24.1898 mode. Select DIG MEAS from the To Screen.

  • Page 61: Tx Frequency Error Measurements

    800, 1 = 1900) Set power level to step 2 (122#) Turn on transmitt carrier (05#) The frequency error measured on the com- munications analyzer must be <200Hz. You can also use Digital Call processing to make these measurements. Motorola Confidential Proprietary...

  • Page 62: Evm Measurements

    Test Procedures TDMA T2290/T2297 EVM Measurements EVM Measurements Figure 40. Digital Measurements Screen TX Frequency Error Measurement Test DIGITAL MEASUREMENTS DTC Meas Make sure the Test Set is in Active EVM 1 Frequency Error mode. 0.0081 3.9683 Select DIG MEAS from the To...

  • Page 63: Disassembly

    Many of the integrated circuit devices used in this equipment are vulnerable to damage from static charges. An anti-static wrist band, connected to an anti- static (conductive) work surface, must be worn during all phases disassembly, repair, reassembly. Motorola Confidential Proprietary...

  • Page 64: Battery Removal

    Disassembly TDMA T2290/T2297 Antenna Removal Telephone Disassembly Antenna Removal Use the thumb and index finger to remove antenna using counterclockwise twisting motion. Battery Removal 1. Turn off the telephone. 2. While holding the phone firmly with one hand, use the index finger on the other hand to press the latch on the battery cover.

  • Page 65: Back Housing Removal

    Disassembly TDMA T2290/T2297 Speaker Removal 4.Use the thumb and index finger to grab the batteries and pull them out of the telephone housing. Back Housing Removal 1.Using a T6 Torx driver, unscrew the five torx screws that attach the back housing to the main body of the phone.

  • Page 66: Transceiver Board Removal

    Disassembly TDMA T2290/T2297 Keypad Removal Transceiver Board Removal While holding the phone firmly with one hand, use the thumb, middle and index fingers of the other hand to carefully separate the transceiver phone from the main assembly. Display Removal 1. Lift the latches that hold the display in place to separate the display from the main board.

  • Page 67: Keypad Removal

    Disassembly TDMA T2290/T2297 Speaker Removal 3.Using tweezers, lift the flex connector to release the flex assembly from the main board. Carefully lift the display from the main board. Keypad Removal Lift the keypad from the front housing using the thumb and index fingers.
  • Page 68 Disassembly TDMA T2290/T2297 Keypad Removal Motorola Confidential Proprietary...

  • Page 69: Parts List

    Parts List Mechanical Explosion Introduction The Mechanical explosion contains a table Motorola maintains a parts office staffed to of mechanical part numbers that may change process parts orders, identify part numbers, and otherwise assist in the maintenance and after publication of this manual. For an up- dated list of part numbers contact an AAD repair of Motorola Cellular products.
  • Page 70 Parts List TDMA T2290/T2297 Motorola Confidential Proprietary...

  • Page 71: General Description

    21-13743N34 C1570 21-13928N01 C1814 21-13743L41 C150 21-13743L41 C1571 21-13743N40 C1815 21-13743L17 C1501 21-13928G01 C1572 21-13743N40 C1816 21-13743L41 C1502 21-13743N24 C1573 21-13743N40 C1817 21-13743L01 C1503 21-13743N24 C1574 21-13743N40 C18853 21-13743N50 C1505 21-13928K09 C1575 21-13743N40 C18860 21-13743N40 C1506 21-13928K09 Motorola Confidential Proprietary...

  • Page 72: Tx Operational Description

    Parts List TDMA T2290/T2297 Reference Reference Reference Part Number Part Number Part Number Designator Designator Designator C18862 23-11049A62 C274 21-13743L41 C411 21-13743N26 C18871 21-13743L41 21-13743N40 C412 21-13743N26 C18873 21-13743N30 21-13743N03 C413 21-13743N28 C18881 21-13743L17 C300 21-13743N40 C414 21-13743N05 C18885 21-13743N40...

  • Page 73: Analog Tx Audio Processing

    L821 24-09646M22 CR1001 48-09606E07 J902 09-09059E01 L907 24-09154M71 CR1540 48-09924D09 J940 09-85839G03 L962 24-09414M09 CR1562 48-09653F07 J941 39-09301S02 L967 24-09154M71 CR1563 48-09606E02 J942 39-09301S02 L968 24-09154M61 CR1590 48-09924D09 L101 24-04574Z11 L969 24-09646M05 CR1597 48-09948D33 24-09154M62 Q1099 48-82033T02 Motorola Confidential Proprietary...
  • Page 74 Parts List TDMA T2290/T2297 Reference Reference Reference Part Number Part Number Part Number Designator Designator Designator Q1501 48-09579E42 R10095 06-62057M36 R1104 06-62057M38 Q151 48-09579E24 R10096 06-62057M36 R1105 06-62057M38 Q152 48-09605E02 R1010 06-62057N01 R1106 06-62057M38 Q1551 48-09607E05 R10100 06-62057M90 R1107 06-62057M38...
  • Page 75 48-09283D38 R406 06-62057M85 R806 06-62057M78 U801 51-09730C16 R407 06-62057M52 R807 06-62057M43 U901 51-09730C15 R408 06-62057M40 R808 06-62057M26 U903 51-09920D22 R409 06-62057M85 R809 06-62057M26 U960 51-09923D46 R425 06-62057N13 R811 06-62057M76 VR1500 48-09788E06 R450 06-62057M50 R825 06-62057M36 VR1551 48-09788E06 Motorola Confidential Proprietary...
  • Page 76 Parts List TDMA T2290/T2297 Reference Reference Reference Part Number Part Number Part Number Designator Designator Designator VR501 48-09788E06 VR502 48-09788E06 VR960 48-09788E06 XFMR37 58-85758J03 Y1500 48-09995L08 Motorola Confidential Proprietary...

  • Page 77: Antenna Circuit

    BGA. It provides two fractional N phase vide IQ modulator, power control, and exciter locked loops for use with external VCOs. The functions for IS-136 TDMA portable cellular transmit loop operates at 157.32 MHz in the Motorola Confidential Proprietary...
  • Page 78 General Description TDMA T2290/T2297 Analog TX Audio Processing phones. Both cellular and PCS bands are The transmitter and receiver are duplexed supported. The following functional blocks with bandpass filters to a switch that feeds are contained in the IC: the signal to either the antenna connector or the external antenna jack.

  • Page 79: Digital Tx Audio Processing

    0.8mm centers. GCAP II Stuart IC GCAP II is intended to provide audio and power management functions for Motorola The STUART chip is a device intended for cellular telephone applications. GCAP II is the following five functions. composed of two die. The GCAP II contains...
  • Page 80 General Description TDMA T2290/T2297 GCAP II 2.775V low current reference (REF) • Two BUCK/BOOST switching regulators • Switcher # 1 not used Switcher # 2 BUCK mode 3.3V Charge Pump Output • High End PA Regulator • Differential Speaker (earpiece) amplifier •...
  • Page 81 Service Manual General Description To DCI To GCAPII To DCI To DCI Motorola Confidential Proprietary...

  • Page 83: Service Diagrams

    Because of the sensitivity of RF, measured The service diagrams were carefully prepared readings will be greatly affected if they’ re to allow a Motorola certified technician to taken in certain locations. To get the most easily troubleshoot cellular phone failures.

  • Page 84: Antenna Circuit

    TDMA T2290/T2297: Antenna Circuit F500 FL100 A100 RX_800 RF_800 J100 TX_800 FL453 RX_1900 RF_1900 TX_1900 Description A100 is the internal antenna port for dual band operation(800 &1900MHz). An antenna tap(J100) is used to allow a RF connection to test equipment for proper diagnostic testing.
  • Page 85 Colored boxes represent the area in FL100 which the components are placed. L553 This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary TL541 800MHz TX_800 -32.97dbm 15.12dbm...

  • Page 86: Front End Ic(U10)

    TDMA T2290/T2297: Front End IC(U10) FL10 BUFF_VCO RX_800 FL20 800*_1900 BAND_SW RX_IF RX_1900 DBLR_IN RX_2.75 FE_EN SW_QMOD_KEY LO_CTL FL30 Description The RX front end IC(U10) is used as a first amplifier an d downconverter for dual-band RF appl ications. It removes the RX carrier frequency to produce the RX IF signal. U10 also has some internal LNAs for the receive signals a nd buffers for the VCO signals.
  • Page 87 -14.9dBm 893.97Mhz RX_IF C1806 FL20 page B7 Band 1900 2.87V 2.81V This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary RX_2.75V page B25...

  • Page 88: Zifsynth(U110)

    TDMA T2290/T2297: ZIF_SYNTH (U110) C109 AGC_RSSI RSSI LP_SWITCH Step Atten. U110 MAIN LOOP 2nd LO Shifter Offset VCO Offset LOOP U1000 DATA SPI BUS 8/16/96 BIT SPI BUS MODES DEMOD Demod Converter Ref Osc Filters RX_I 19.44MHz Description RX_Q U110(ZIF_SYNTH) can be divided into two functional sub systems: The ZIF (Zero-Intermediate-Frequency) which p rovides all of the functions of the back-end of a receiver, and the SYN (SYNthesizer) which contains phase-locked loops and modulators to produce the Local Oscillator (LO) and modulated transmit carri er.
  • Page 89 C302,C888 page B9 page B11 This manual is Motorola property. Copying or AGC_RSSI U1500 distribution strictly prohibited without prior written consent from Motorola and must be returned upon page B25 RX_Q Motorola's request. U1800-25 Motorola Confidential Proprietary page B23 450mvp-p RX_I -24.68dbm@112.32Mhz...

  • Page 90: Vco

    TDMA T2290/T2297: VCO_FDBK RX_SF VCO_OUT VCO_STEER Filter Filter Ckt. U306 RXCP_ADA Q880 Q880 LP_SW Description U306 is the local oscillator module used to add frequency selectivity to the transceiver. The frequency of oscilla tion is dependent on the channel and frequency band that the transceiver will be operating in.
  • Page 91 TDMA T2290/T2297: VCO (U306) This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. RXCP_OUT U110 Motorola Confidential Proprietary page B7 C883 R881 Channel: 333 Channel Cellular VCO Freq: 992.31MHz...

  • Page 92: Tx Offset Oscillator

    TDMA T2290/T2297: TX Offset Oscillator U1800 CR301 Q391 TXCP_OUT U110 Loop TXCP_ADA ZIF-SYN Filter CR300 Tank LP_SWITCH U301 Q301 MERLIN TX 800*_1900 C316 U1907 Q351 VCO_FDBK Description The offset oscillator frequency is controlled by U110(ZIF/SYN) via TXCP_OUT. The operating frequency will depend on the dc biasing of CR300. The offset oscillator frequency is 157.32MHz in 800MHz mode, an d 192.36MHz in 1900MHz mode.
  • Page 93 Colored boxes represent the area in C311 which the components are placed. This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary U1800-39 page B23...
  • Page 94 TDMA T2290/T2297: MERLIN (U301) 1900_OUT U301 Main VCO Merlin FL413 U110 ZIFSYN Offset Oscillator XFMR377 U1800 TX_I FL350 TX_Q TX_STEP 800_OUT AOC_CNTL 800*_1900 U1700 Description U301 is a TX modulator. It takes the TX information and modulates it on a carrier for RF transmission .
  • Page 95 -15.95 dBm@1900MHz -20.39 dBm@800MHz This manual is Motorola property. Copying or 192.36 MHz distribution strictly prohibited without prior written 157.32 MHz OVCO consent from Motorola and must be returned upon Motorola's request. R350 page B11 Motorola Confidential Proprietary TX_SF page B7...

  • Page 96: Exciter

    TDMA T2290/T2297: Exciter CR810-A 800KEY CR810-B 800BIAS TX_2.75 Q811 Q810 DRIVER_B+ Q475-A R811 800_OUT FL454 800_PA_IN FL452 Q401 CR910-A CR910-B 1900KEY DRIVER_B+ TX_2.75 1900BIAS Q475-B Q910 Q411 1900_OUT 1900_PA_IN Description After the desired transmit informati on is modulated with a TX carrier frequency, enough signal power needs to be provided for RF transmission through the antenna. The exciter stage is used to relieve amplifi cation of the final stage PA.
  • Page 97 TDMA T2290/T2297: Exciter This manual is Motorola property. Copying or 1900KEY* distribution strictly prohibited without prior written U1907-61 consent from Motorola and must be returned upon Motorola's request. page B35 1900KEY Motorola Confidential Proprietary Q901-4 page B17 800KEY* U1907-62 U1800-14...

  • Page 98: Pa Circuit

    TDMA T2290/T2297: PA Circuit 800KEY Q1807 800BIAS 800_PA_IN TX_800 U801 Q901 1900KEY 1900BIAS TX_800 1900_PA_IN U901 Description The final s tage PA circuit provides the n ecessary amount of power for RF trasmission through an antenna . U801 is a PA module that is capable of operating in the 800MHz band under anal og or digital mode.
  • Page 99 TDMA T2290/T2297: PA Circuit This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary C911 C907 R911 10.28 dBm 1859.97MHz C904 1900_TX C905 C772...

  • Page 100: Rf Detect

    TDMA T2290/T2297: RF Detect/A_D Switch TX_800 TX_800 TL800 Q821 TL801 Load Load SW_QMOD_KEY SW_QMOD_KEY CR822 Q505 TX_STEP Q503-A TL901 CR504 RF_DET TX_2.75 TL900 TX_1900 TX_1900 SW_QMOD_KEY TX_STEP Q501 Q503-B CR503 Q502 CR502 Description The RF detect circuit is use d to detect the RF amplitud e level of the TX signal. RF detect reports back to U1800(DCI) pin 31, using a dc level, for amplitude stabi lization. The RF detect circuit is RF coupled with the TX sign al from either band, 8 00MHz or 1900MHz.
  • Page 101 B23 TX_2.75 R502 page B25 Q501 C508 This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. C512 C504 Motorola Confidential Proprietary L503 TX_2.75 R506 page B25...

  • Page 102: Reference Oscillator

    TDMA T2290/T2297: Reference Oscillator OSC_DIS RX_2.75 Q151 Q152 19.44MHZ U150 RF_19.44MHZ Description The reference oscill ator U150, operating at 19.44MHz, provides a "reference frequency" for the RF synthesize rs and various logic circuits. The OSC_DIS line which is controlled by U1000 (CPU) is used to turn off U150 during sleep mode. The OSC_DIS line switches Q151 on or off, controllin g the supply voltage to U150 and Q152.
  • Page 103 Reference Oscillator (U150) This manual is Motorola property. Copying or VOLTAGE SUPPLIES distribution strictly prohibited without prior written consent from Motorola and must be returned upon Colored boxes represent the area in Motorola's request. which the components are placed. Motorola Confidential Proprietary RF_19.44MHz...
  • Page 104 TDMA T2290/T2297: DCI (U1800) BLOCK DIAGRAM NOT NECESSARY REFER TO PAGE B23 Description The DCI (U1800) is data converter interface between the DSP and the RF functions of a dual band TDMA transceiver. It incorpo- rates the following functions: •...

  • Page 105: Dci(U1800)

    TDMA T2290/T2297: DCI(U1800) This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Power Step 0-5 6-10 Motorola Confidential Proprietary TX_ENB U1907-60 QMOD_KEY page B35 ZIFSYN_REF U301,Q1500...

  • Page 106: Gcap2(U1500)

    TDMA T2290/T2297: GCAP2 (U1500) BLOCK DIAGRAM NOT NECESSARY REFER TO PAGE B25 Description The GCAP2(U1500) provides the regulators and start-up functions for the entire radio. The GCAP2 contains the following hardware blocks: • On/Off control signal s to properly activate the radio.
  • Page 107 This manual is Motorola property. Copying or R1514 TX_2.75 distribution strictly prohibited without prior written VOLTAGE SUPPLIES consent from Motorola and must be returned upon Motorola's request. Colored boxes represent the area in which the components are placed. Motorola Confidential Proprietary R1597 2.75V...

  • Page 108: Voltage Regulators

    TDMA T2290/T2297: Voltage Regulators CR1590 U903 2.75V C18914 BATT_SAV 2.75V U1501 VDOUB CR1540 Description There are some circuits that require a voltage higher than the battery source. For this reason, a voltage doublin g charge pump circuit is provided. U1501 takes the 2.75V source and oscillates it w ith a high pe ak to peak signal.
  • Page 109 TDMA T2290/T2297: Voltage Regulators This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary VOLTAGE SUPPLIES Colored boxes represent the area in which the components are placed.

  • Page 110: Charger

    TDMA T2290/T2297: Charger Q962 Q1812A EXT_B+ R964 Q1812B R1593 TRICKLE_SET Q1597A ISENSE SENSE CHRG_EN BATT+ U960 PWRON Q1598 CR1599 C1589 Q1597B Description U960 is a Charger control OverVoltage IC(COVIC). It is used to control the rate of charge to Nickel Metal Hydrid(NiMH) batteries that are ins talled in the transceiver.
  • Page 111 TDMA T2290/T2297: Charger This manual is Motorola property. Copying or distribution strictly prohibited without prior written VOLTAGE SUPPLIES consent from Motorola and must be returned upon Motorola's request. Colored boxes represent the area in which the components are placed. EXT_B+...

  • Page 112: Audio Circuit

    TDMA T2290/T2297: Audio Circuit J940 Headset Speaker HDST_ SPKR AUX_MIC Headset Mic 2.75V BOOM_MIC_DET Q1551 R1540 Description When a headset is in serted in J940, the internal speaker an d microphone is dis abled. The user can now use the headset for handsfree conversation. BOOM_MIC_DET informs U1000 whethe r a headset is inse rted or not.
  • Page 113 TDMA T2290/T2297: Audio Circuit This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary R1540 C18858 BOOM_MIC_DET Headset U1000 page B37 Q1551 2.78v 2.75V 2.78v...

  • Page 114: Dsp(U1900)

    TDMA T2290/T2297: DSP (U1900) BLOCK DIAGRAM NOT NECESSARY REFER TO PAGE B33 Description The following list is a description of the DSP(U1900): • Digital Control channel • ROM Mask Device(48K) • Patch RAM space(16K) 1. Essentially DTC minus audi o and vocoders •...
  • Page 115 DSP(U1900) This manual is Motorola property. Copying or distribution strictly prohibited without prior written VOLTAGE SUPPLIES consent from Motorola and must be returned upon Motorola's request. Colored boxes represent the area in which the components are placed. Motorola Confidential Proprietary...
  • Page 116 Host Port Emulation - This provides a bus interconnection between the call processor and the DSP via the call processor’ s parallel memory bus, interconnected to the modem DSP’ s parallel memory bus. This communicati ons port is functionally identical to the host port provided for the Motorola DSP; To both devices, the port appears as a bus-mapped peripheral.

  • Page 117: Stuart(U1907)

    TDMA T2290/T2297: STUART(U1907) 19.44MHZ C153 This manual is Motorola property. Copying or distribution strictly prohibited without prior written page B21 consent from Motorola and must be returned upon Motorola's request. C18853 Motorola Confidential Proprietary 1900TX CALL_DATA U1000 Pin 61 .055v 800Mhz 1.9Ghz...

  • Page 118: Call Processor(U1000)

    TDMA T2290/T2297: Call Processor (U1000) BLOCK DIAGRAM NOT NECESSARY REFER TO PAGE B37 Description U1000 is a single-chip microcontroller that controls major functions of the cellular phone. U1000 will perform the functions of both the master controller and keyboard processor. These functions include: •...
  • Page 119 TDMA T2290/T2297: Call Processor(U1000) This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary HOST_ENB EE_CS U1908 U1907-19 page B39 page B35 ECLK U1907-18...

  • Page 120: Memory

    TDMA T2290/T2297: Memory Q1811 R1201 U1200 Q1806 Description A serial EEPROM(U1908) of 256K bytes is used for storage of the NAM information, authentication keys, phasing data, ESN, and memory. The EEPROM serial inter - face to the microcontroller i s a standard SPI-compatible i nterface.
  • Page 121 TDMA T2290/T2297: Memory This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. Motorola Confidential Proprietary VOLTAGE SUPPLIES U1000 CALL_DATA page B37 Colored boxes represent the area in which the components are placed.
  • Page 122 TDMA T2290/T2297: B+ Discharge/Backlight Driver BKLT_BIAS 2.75V R1573 Q1810 BACKLIGHT SRAM_VCC Q1574B Q1574A Q1809 R1573 R10134 Description The B+ discharge circ uit consists of Q1574 and it's related components. This circuit is used in conjuncti on with the Power Cut process.
  • Page 123 B37 Channel: 333 This manual is Motorola property. Copying or Backlight AF Gen1 Freq: 1kHz distribution strictly prohibited without prior written consent from Motorola and must be returned upon AF Gen1 Level: 600mV Motorola's request. 1.35V Accessory DHFA Chrgr...
  • Page 124 TDMA T2290/T2297: Keypad BLOCK DIAGRAM NOT NECESSARY REFER TO PAGE B43 Description To cycle the power on the phone, the power key needs to be depressed. Upon depressing the power key, KEY_ON*_OFF will be pulled low. As soon as the power key is released the KEY_ON*_OFF line will be pulled high.

  • Page 125: Keypad

    TDMA T2290/T2297: KEYPAD This manual is Motorola property. Copying or KPR(1) distribution strictly prohibited without prior written U1000 consent from Motorola and must be returned upon KPR(2) Motorola's request. page B37 U1000 KPC(2) KPR(3) page B37 U1000 Motorola Confidential Proprietary...

  • Page 126: Connectors

    TDMA T2290/T2297: Connectors This manual is Motorola property. Copying or distribution strictly prohibited without prior written consent from Motorola and must be returned upon Motorola's request. RESET U1000 Motorola Confidential Proprietary page B37 DISP_CS* U1000 J902 page B37 VOLTAGE SUPPLIES...
  • Page 127 TDMA T2290/T2297: Board Layout Side 1 Board Issue: P8 A100 R1810 CR1562 C883 R881 C316 C399 C886 R393 C1573 R1806 C312 Q1809 L100 Q351 C884 R350 U1800 R884 C555 C311 C551 C888 L562 R883 Q391 C885 R1900 FL20 C899 C1574...

  • Page 128: Layout Side 1

    TDMA T2290/T2297: Layout Side 2 Board Issue: P8 R1514 C18858 S508 S512 C1598 VR1551 R1597 Q811 R729 R10101 R10017 R735 Q475 R1536 FL454 R10016 C502 R734 C1519 C406 R728 C1572 R1013 DS907 R1575 R727 C408 Q501 C1570 R726 R1106 C504...

  • Page 129: Feedback Form

    To report any problems or omissions to this service manual; 1. Photocopy this page. 2. Fill out the lines below and give your comments. 3. Fax this form to Motorola TDMA Global Service Support Fax number 1-815-884-3121 Attn: Documentation Staff...

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