Motorola Gp328 Gp338 Detailed 6804110j64 F Manual
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Troubleshooting charts6D-379.0 Troubleshooting chartsMCU CheckPower Up Alert Tone OK? Speaker OK? U409 EXTAL= 7.3728 MHz? U201 Pin 19 16.8 MHz 5V at U247? 3.3V at U248? 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 U247? 4/3.3V at Pin 1 U248Check Q400Replace U247/U248Check any short to SWB+, Vdda or VdddPress PTT....
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6D-38Troubleshooting chartsBad SINAD Bad 20dB Quieting No Recovered AudioSTARTAudio at pin 27 of U301?Check ControllerYe sNoSpray of inject 1st IF into XTAL Filter IF Freq: 45.1MHzAudio heard?BYe sNo Check 2nd LO Control Voltage at C363VCO locked?BYe s16.8 MHz check at pin 22 U301?Activity on U301 sel pin?Check FGUNo NoAA Ye sCheck Q320 bias circuitry for faults.Rotate Freq. KnobCheck controller.Before replacing U301, check 2nd VCO Q320. Check VCO O/P level, C351, C352.Ye sNoTroubleshooting Flow Chart...
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Troubleshooting charts6D-39IF Signal at L311?No RF Signal at T301?RF Signal at C310?NoRF Signal at C307?NoRF Signal at C301?No orCheck harmonic filters L101 & L102 and ant. switches CR101, CR102, L104Check filter between C301 & C307; program filter to schematic test freq and check varactor voltages.Inject RF into J101Are varactor voltages OK?NoYe sCheck RF amp (Q301) Stage.Check filter between C310 & T301.Ye sCheck T301, T302, CR306, R308, R309, R310Ye s1st LO O/P OK? Locked?Ye sCheck FGUYe sTrace IF...
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6D-40Troubleshooting chartsSTARTNo PowerIs There B+ Bias for Ant switchC h e c k Q 111Is 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 U101 at Cap C160Is Power OK?Replace U101Is Power OK?Replace Q101DoneDoneNo Ye s Ye sNo No Ye sLow High No Ye s Ye s No Ye s NoTroubleshooting Flow Chart for Transmitter...
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Troubleshooting charts6D-415V at pin 6 of CR201Is information frommP U409 correct?Is U201 Pin 18 AT 4.54 VDC?Is U201 Pin 47 AT = 13 VDCIs U241 Pin 19 4.3 VDC in TX?StartVi s u a l check of the Board OK?Correct ProblemCheck 5V Regulator+5V at U201 Pin’s 13 & 30?Is 16.8MHz Signal at U201 Pin 19?Check FL201, C206, C207, C208, CR203 & R204Are signals at Pin’s 14 & 15 of U201?Check L202Check Q260, Q261 & R260U201 pin 2 at >3VinTxand -30 dBm?Are R231,R232, R233,C231,C232, & C233 OK?Replace U201If L261, C263 &...
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6D-42Troubleshooting chartsSTARTNo LO?Tx Carrier?VCO OKCheck R260TRB = 5V?Pin 10 >1V?L253 O/C?Change L253Change U241AUX 3 High?Check U201 Pin 2 for 3.2VPin 19 =0VAUX 4 High?Change Q261Vctrl0V or 13V?L243 Open Circuit?Change U241Change L243Change U201Check for faulty parts or dry joints of L271, L273, C370, C386, R339 & L320A ANo No Ye s Ye s Ye s No NoYe sYe s Ye s No Ye sNoNoYe sYe sNo NoCheck R245 for dry joint or faultyNoTroubleshooting Flow Chart for VCO...
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6E-1Section 6E MODEL CHARTS AND TEST SPECIFICATIONS (29-42/35- 50MHZ)1.0 Model Charts1.1 29-42MHzGP Series, LB1, 29-42 MHzModel DescriptionAZH25BEC9AA3GP328 29-42 MHz 6W 16CHAZH25BEH9AA6 GP338 29-42 MHz 6W 128CHItem DescriptionXPMUB1011GP328 Super Tanapa 29-42 MHz 6W X PMUB1013 GP338 Super Tanapa 29-42 MHz 6WXPMUB1018GP328 Tanapa 29-42 MHz 6W X PMUB1020 GP338 Tanapa 29-42 MHz 6WXPMLB4002GP328 B/C Kit 29-42 MHz 6W X PMLB4004 GP338 B/C Kit 29-42 MHz 6WXPMLN4216GP328 Front Housing Kit X PMLN4199 GP338 Front...
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6E-2Model Charts1.2 35-50MHzGP Series, LB2, 35-50 MHzModel DescriptionAZH25CEC9AA3GP328 35-50 MHz 6W 16CHAZH25CEH9AA6 GP338 35-50 MHz 6W 128CHItem DescriptionXPMUB1026GP328 Super Tanapa 35-50 MHz 6W X PMUB1023 GP338 Super Tanapa 35-50 MHz 6WXPMUB1033GP328 Tanapa 35-50 MHz 6W X PMUB1030 GP338 Tanapa 35-50 MHz 6WXPMLB4010GP328 B/C Kit 35-50 MHz 6W X PMLB4007 GP338 B/C Kit 35-50 MHz 6WXPMLN4216GP328 Front Housing Kit X PMLN4199 GP338 Front Housing KitXXNAB6064ALow/Mid Band Heliflex Antenna Trimmable X...
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Specifications6E-32.0 SpecificationsGeneralTransmitter ReceiverAll specifications are subject to change without notice.LowbandFrequency:29-42 MHz 35-50 MHz Channel Capacity: GP328 : 16 Channels GP338 : 128 ChannelsPower Supply:7.5 Volts±20% Dimensions with Standard High Capacity NiMH Battery: with Ultra High Capacity NiMH Bat- tery:137mm x 57.5mm x 37.5mm 137mm x 57.5mm x 40mmWeight: with Standard High Capacity NiMH Battery: with Ultra High Capacity NiMH Bat- tery:420 g 500 g Average Battery Life @...
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6E-4Transmitter3.0 Transmitter3.1 General(Refer to Figure 6-1) The Lowband transmitter consists of the following basic circuits: 1.power amplifier (PA) 2.antenna switch 3.harmonic filter 4.antenna matching network 5.power control integrated circuit (PCIC).3.1.1 Power AmplifierThe power amplifier consists of two LDMOS devices: 1.PA driver, U101 and 2.PA final stage, Q100. The LDMOS driver (U101) provides 2-stage amplification using a supply voltage of 7.3V. The amplifier is capable of supplying an output...