Motorola Gp328 Gp338 Detailed 6804110j64 F Manual
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Circuit Board/Schematic Diagrams and Parts List 6B -35 R5R3802 100 R5_1_VCO 0.1uF C3804 1KR3807 NU 1K L3801 100nH RX_INJ Q3801 RX_INJ_1_VCO C3802 22pF NU 220 NU R3801C3801 4.7pF0.1uF C3812 L3811 100nH 100R3811 C3810 10pF NU0.1uF C3811 L3812 100nH Vdda VSF VSF_1_VCO Vdda_3_VCO R3817 00L3813 1uH 0 NU0R3818 C3818 .022uF TX_OUT TX_SWITCH RX_OUT RX_SWITCH PRESC_OUT VCC_BUFFERSVCC_LOGIC14 18 U3801 10 138 7 122 3 19 16 151 4 205 6 RX_IADJ SUPER_FLTR TRB_IN TX_BASE TX_EMITTERTX_IADJ COLL_RFIN FLIP_IN RX_BASE...
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6B -36Circuit Board/Schematic Diagrams and Parts List DATA CLK CSX UNSWB+ CSX_2_PA UNSWB_LPLUS_2_PAUNSW_LPLUS_3_PA CLK_2_PA DATA_2_PA C3566 100pF 2 U3503 GND 3POS VOUT 12K R3561 R3562 33K C3561 .022uF LM50C 5185963A15 330pF C3501 300 R3501 R3503 300 TX_INJ_1_PA18 R3502 TX_INJ C3504 .022uF 33pF C3502 5.6nH L3501 470 R3505 330pF C3505 C3503 33pF68nH L3503 .022uF C3508 330pF C3509 68nH L3504 330pF C3567 330K NU R3565 220pF C3564 3300pFC3562 3300pF C3563 330K R3564.022uF C3565 270K R3563RFOUT2 1VCNTRL14VD1...
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Circuit Board/Schematic Diagrams and Parts List 6B -37 VHF Radio Parts ListCircuit RefMotorola Part No.DescriptionB501 0986237A02 Connector, Contact Battery B503 3980502Z01 Backup battery B+ (not placed in GP328) B504 3980501Z01 Backup battery B- (not placed in GP328) C3200 2113743N31 16pF C3203 2113743N50 100pF C3204 2113743L41 10000pF, 10% C3205 2113928N01 0.1uF, 10% C3206 2113743L41 10000pF, 10% C3207 2113743N10 2.2pF C3209 2311049A07 1uF C3210 2113743L17 1000pF, 10% C3211 2311049A56 4.7uF, 20%, 10V...
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6B -38Circuit Board/Schematic Diagrams and Parts ListC4020 2113743L17 1000pF, 10% C4021 2113743L17 1000pF, 10% C403 2113743G24 2.2uF, +/-80%/-20% C407 2113928N01 0.1uF, 10% C408 2113743N50 100pF C409 2113928N01 0.1uF, 10% C410 2113928N01 0.1uF, 10% C411 2113928N01 0.1uF, 10% C414 2113928N01 0.1uF, 10% C415 2185895Z01 0.01uF, 10% C416 2113928N01 0.1uF, 10% C419 2113743L41 10000pF, 10% C420 2113743L41 10000pF, 10% C421 2113928N01 0.1uF, 10% C422 2113928N01 0.1uF, 10% C423 2113743N50 100pF C424 2311049A59...
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Circuit Board/Schematic Diagrams and Parts List 6B -39 R3205 0662057M74 1000R3206 0662057N23 100K R3207 0662057N13 39K R3208 0662057M50 100 R3209 0662057M74 1000 R3210 0662057M82 2200 R3211 0662057M82 2200 R3212 0662057M90 4700 R3213 0662057M82 2200 R3214 0662057M34 22 R3219 0662057M50 100 R3220 0662057M90 4700 R3221 0662057M50 100 R3224 0662057M26 10 R3225 0662057M74 1000 R3226 0662057M26 10 R3270 0662057M74 1000 R3271 0662057M42 47 R3272 0662057N15 47K R3273 0662057N15 47K R3274 0662057M83 2400 R3275...
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6B -40Circuit Board/Schematic Diagrams and Parts List * Motorola Depot Servicing only VR439 4880140L17 Zener diode-12V VR447 4802245J74 ZENER DIODE-10V VR448 4802245J74 ZENER DIODE-10V VR449 4802245J74 ZENER DIODE-10V VR450 4802245J74 ZENER DIODE-10V VR460 4802245J73 ZENER DIODE-6.8V VR501 4802245J73 ZENER DIODE-6.8V VR506 4802245J73 ZENER DIODE-6.8V Y3200 9186153B01 Crystal Filter Y3761 4805875Z04 16.8MHz Xtal oscillator (SMD) 5480678Z01 PCB Bar Code Label 8486062B16 VHF main PC Board Circuit...
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Troubleshooting charts6B-419.0 Troubleshooting chartsMCU CheckPower Up Alert Tone OK? Speaker OK? U409 EXTAL= 7.3728 MHz? U3701 Pin 19 16.8 MHz 5V at U3711? 3.3V at U3201? U409 Reset Pin 94 High?MCU is OKNot able to pro- gram RF Board ICsBefore replacing MCU, check SPI clock, SPI data, and RF IC selectReplace Speaker Read Radio OK?Check SetupReprogram the correct data.See FGU Troubleshooting7.5V at Pin 3/5 U3711? 7.5V at Pin 1 U3201Check Q400Replace U3711/U3201Check any short to SWB+, Vdda or VdddPress...
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6B-42Troubleshooting chartsBad SINAD Bad 20dB Quieting No Recovered AudioSTARTAudio at pin 27 of U3220?Check ControllerYe sNoSpray of inject 1st IF into XTAL Filter IF Freq: 45.1MHzAudio heard?BYe sNo Check 2nd LO Control Voltage at C3279VCO locked?BYe s16.8 MHz check at pin 21 U3220?Activity on U3220 sel pin?Check FGUNo NoAA Ye sCheck Q3270 bias circuitry for faults.Rotate Freq. KnobCheck controller.Before replacing U3220, check 2nd VCO Q3270. Check VCO O/P level, C3272, C3273.Ye sNoTroubleshooting Flow...
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Troubleshooting charts6B-43IF Signal at C3200?No RF Signal at T3301?RF Signal at R3313?NoRF Signal at C3306?NoRF Signal at C3302?No orCheck harmonic filter L3531 & L3532, C3532 and ant. switches D3521, D3551, L3551, R3551, C3551, C3552, L3552Check filter between C3302 & C3306; pro- gram filter to schematic test freq and check varactor voltages.Inject RF into J3501Are varactor voltages OK?NoYe sCheck RF amp (Q3302) Stage.Check filter between C3313 & T3301.Ye sCheck T3301, T3302, CR3301, R3321, R3322,...
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6B-44Troubleshooting chartsSTARTNo PowerIs There B+ Bias for Ant switchCheck Q3561Is Current OK?Is Control Volt- age High or LowCheck PCIC1. Check Pin Diodes 2. Check Harmonic FilterInspect/Repair Tx. Output NetworkIs Power OK?DoneCheck Drive to ModuleIs Drive OK?Troubleshoot VCOInspect PA Network/ Check Power Out of U3501 at Cap C3512Is Power OK?Replace U3501Is Power OK?Replace Q3501DoneDoneNo Ye s Ye sNo No Ye sLow High No Ye s Ye s No Ye s NoTroubleshooting Flow Chart for Transmitter...