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Motorola Gp328plus Gp338plus Gp338xls Detailed 6804112j28 G Manual
Motorola Gp328plus Gp338plus Gp338xls Detailed 6804112j28 G Manual
Here you can view all the pages of manual Motorola Gp328plus Gp338plus Gp338xls Detailed 6804112j28 G Manual. The Motorola manuals for Portable Radio are available online for free. You can easily download all the documents as PDF.
Page 151
Circuit Board/Schematic Diagrams and Parts List5C-25 TX_IADJ1 TX_OUT 10 TX_SWITCH 13 VCC_BUFFERS14VCC_LOGIC18 RX_EMITTER6 RX_IADJ2 RX_OUT 8 RX_SWITCH 7SUPER_FLTR3 TRB_IN19 TX_BASE16 TX_EMITTER15 COLL_RFIN4 FLIP_IN20 GND_BUFFERS11 GND_FLAG9 17 GND_LOGIC PRESC_OUT 12 RX_BASE5 50U54U241 Rx_sw Tx_swC273 0.1uF 1.1pFC272 L273 18nH 27nH 1pF L271 C271 R245 240 C276 2.2uF 100pFC281 390nHL2810.1uF C286 100pFC246 2.7pF C245 120 R242 100pFC285 R241 18 15K R244L243 RESONATOR 1 234.3pFC250 4.3pFC242 4.3pFC243 12...
Page 152
5C-26Circuit Board/Schematic Diagrams and Parts List VL 6 VLIM19 TEMP30 V10 14 V45 16 17 V5EXT20 VAR1 18 VAR224 VAR3 VG 15 22 NA Q 11QX 10 1 RFIN RS21 31 RSET RX23 T1 2 CLK26 CQ 12 CQX 13 DATA28 F168 9 GND1 8 GND225 INT 4 U102 H99S ANO32 BPOS27 CEX29 CI 3 CJ 5 CL 7 C138 100pF CR105 GND 31 POS 2 VOUT R131 LM50 10K R130 18K 100pF C170C110 100pF 0.1uF C126 .022uFC173 5VTX_BIAS RESET UNSWB+ DATACLK CSX 100pF C122C105 100pF4 1 3 100pF C132 Q111 2 6 100pF C174 R133 UNSWB+ NU10K 4.7K 47K 47K 1000pFC127...
Page 153
Circuit Board/Schematic Diagrams and Parts List5C-27UHF Band 2 Radio Parts List (RF Board)Circuit Ref Motorola Part No. Description B501 0986237A02 Battery Contact Connector B503 3980502Z01 Contact, Backup B+ (not used in GP328 Plus) B504 3980501Z01 Contact, Backup B- (not used in GP328 Plus) C101 2113740F51 100 C102 2113740F22 6.2 C103 2113740F28 11 C104 2113740F22 6.2 C105 2113743N50 100 pF, 5% C106 2113740F19 4.7 pF C107 2113740F15 3.3 C108 2113743N50 100 pF, 5% C109 2113740F51 100 C110...
Page 154
5C-28Circuit Board/Schematic Diagrams and Parts ListC382 2311049A59 10.0 uF, 10% C383 2113743N50 100 pF, 5% C384 2113743N44 56.0 pF, 5% C385 2113743N44 56.0 pF, 5% C386 2113743N50 100 pF, 5% C390 2113743N50 100 pF, 5% C391 NOT PLACED C395 2113743N50 100 pF, 5% C396 NOT PLACED C397 2311049A07 1.0 uF, 10% C502 2311049A05 0.47 uF, 10% C503 2113743N50 100 pF, 5% C505 2113743N50 100 pF, 5% C511 2113743N50 100 pF, 5% C512 2113743N50 100 pF, 5% C513 2113743N50 100 pF, 5% C514 2113743N50 100 pF, 5% C520...
Page 155
Circuit Board/Schematic Diagrams and Parts List5C-29 * Motorola Depot Servicing only** Not Serviceable R312 0662057M83 2400, 5% R313 0662057M62 330, 5% R314 0662057M85 3000, 5% R315 0662057N01 12 k, 5% R316 0662057A96 91 k, 5% R317 0662057M74 1000, 5% R318 0662057A79 18 k, 5% R319 0662057A29 150, 5% R320 0662057M74 1000, 5% R321 0662057M83 2400, 5% R322 0662057N30 200 k, 5% R324 0662057M81 2000, 5% R325 0662057M94 6800, 5% R326 NOT PLACED R327 0662057N11 33 k, 5% R328 0662057M12 2.7, 5% R329...
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5C-30Circuit Board/Schematic Diagrams and Parts List THIS PAGE INTENTIONALLY LEFT BLANK
Page 157
Troubleshooting charts5C-31 9.0 Troubleshooting charts MCU Check Power 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 OK Not able to pro- gram RF Board ICsBefore replacing MCU, check SPI clock, SPI data, and RF IC select Replace Speaker Read Radio OK? Check Setup Reprogram the correct data. See FGU Troubleshooting 7.5V at Pin 3/5 U247? 4/ 3.3V at Pin 1 U248Check Q400 Replace U247/ U248 Check any short...
Page 158
5C-32Troubleshooting charts Bad SINAD Bad 20dB Quieting No Recovered AudioSTART Audio at pin 27 of U301?Check ControllerYe s No Spray of inject 1st IF into XTAL Filter IF Freq: 45.1MHz Audio heard?BYe s No Check 2nd LO Control Voltage at C363 VCO locked?BYe s 16.8 MHz check at pin 22 U301? Activity on U301 sel pin? Check FGU No No A A Ye sCheck Q320 bias cir- cuitry for faults. Rotate Freq. Knob Check controller. Before replacing U301, check 2nd VCO Q320. Check VCO O/P level, C351, C352. Ye s...
Page 159
Troubleshooting charts5C-33 IF Signal at L311? No RF Signal at T301? RF Signal at C310? No RF Signal at C307? No RF Signal at C301? No or Check harmonic filters L101 & L102 and ant. switches CR101, CR102, L104 Check filter between C301 & C307; program filter to schematic test freq and check varactor voltages. Inject RF into J101 Are varactor voltages OK? No Ye s Check RF amp (Q301) Stage. Check filter between C310 & T301. Ye s Check T301, T302, CR306, R308, R309, R310 Ye s 1st LO O/P OK?...
Page 160
5C-34Troubleshooting charts START No Power Is There B+ Bias for Ant switchCheck Q111 Is Current OK?Is Control Voltage High or LowCheck PCIC 1. Check Pin Diodes 2. Check Harmonic Filter Inspect/Repair Tx. Out- put Network Is Power OK? Done Check Drive to Module Is Drive OK? Troubleshoot VCO Inspect PA Network/Check Power Out of U101 at Cap C160 Is Power OK? Replace U101 Is Power OK? Replace Q101 Done Done No Ye s Ye sNo No Ye sLow High No Ye s Ye s No Ye s No Troubleshooting Flow Chart for...