![Motorola PRO Series Скачать руководство пользователя страница 509](http://html.mh-extra.com/html/motorola/pro-series/pro-series_detailed-service-manual_1839123509.webp)
Troubleshooting Flow Chart for VCO
Section 9: 3-5
4.0
Troubleshooting Flow Chart for VCO
Are Q4332
Base at 0.7V
Collector at 4.5V
Emitter at 110mV
Are Q4301
Base at 2.4V
Collector at 4.5V
Emitter at 1.7V
Are U4301 Pins
13 at 4.4V
15 at 1.1V
10 at 4.5V
16 at 1.9V
Low or no RF Signal
at TP4003
Visual check
of board
OK?
35mV DC at
U4301 Pin 19
NO
YES
Replace Q4301
at base of Q4332
NO
NO
NO
NO
YES
YES
YES
YES
Low or no RF Signal
at input to PA
4.8V DC at
U4301 Pin 19
Is RF available
at C4402
YES
YES
YES
YES
NO
NO
NO
NO
NO
Audio =180mVrms
at “-” S
ide of
4.5VDC
at CR4321
If C4321 and R4321 are OK,
then replace CR4321
Replace C4322
Replace C4325
NO
NO
YES
YES
If parts between
R4402 & U4301 Pin10
are OK, replace U4301
TX VCO
RX VCO
Correct
Problem
Visual check
of board
OK?
Check runner
between U4201 Pin 2
and U4301 Pin 19
Is RF available
If all parts from U4301 Pin 8
to Base of Q4332 are OK,
replace U4301
If all parts associated
with the pins are OK,
replace Q4332
If all parts from collector
of Q4332 to TP4003 are
OK, Replace Q4332
Power OK but
no modulation
Check parts from
R4402 to U4401 Pin16
If all parts
associated
with the pins
are OK,
replace U4301
YES
YES
Make sure Synthesizer is
working correctly and runner
between U4201 Pin 28 and
U4301 Pin 14 & 18 are OK
4.5V DC
OK?
OK?
OK?
C4325
at U4301 Pin 14 & 18
4.5V DC
OK?
at U4301 Pin 14 &18
NO
Содержание PRO Series
Страница 1: ...CDM Series and PRO Series Two Way Mobile Radios Detailed Service Manual 6881091C63 F ...
Страница 4: ...Notes ...
Страница 6: ...Notes ...
Страница 8: ...Section 1 ii 6881091C63 F Notes ...
Страница 12: ...Section 1 1 4 Radio Model Information 6881091C63 F Notes ...
Страница 22: ...Section 1 2 10 Notes For All Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 46: ...Section 2 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 78: ...Section 3 1 20 Controller Board Audio and Signaling Circuits Section 6881091C63 F Notes ...
Страница 80: ...Section 3 2 2 Troubleshooting Flow Chart for Controller 6881091C63 F Notes ...
Страница 84: ...Section 3 3 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 146: ...Section 3 3 66 Controller T6 T7 Schematics and Parts Lists 8471235L06 Notes 6881091C63 F ...
Страница 152: ...Section 4 1 4 Technical Specifications 6881091C63 F Notes ...
Страница 168: ...Section 4 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Страница 172: ...Section 4 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 214: ...Section 4 4 46 VHF 136 174 MHz 1 25 W PCB 8486172B08 Schematics and Parts Lists Notes 6881091C63 F ...
Страница 232: ...Section 5 1 4 Technical Specifications 6881091C63 F Notes ...
Страница 242: ...Section 5 2 10 UHF Band 1 403 470 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Страница 296: ...Section 6 1 4 Technical Specifications 6881091C63 F Notes ...
Страница 306: ...Section 6 2 10 UHF Band 2 450 512 527 MHz 1 25 W Frequency Synthesis 6881091C63 F Notes ...
Страница 316: ...Section 6 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 328: ...Section 6 4 14 UHF Band 2 450 512 527 MHz 1 25 W PCB 8485671Z03 Schematics and Parts Lists Notes 6881091C63 F ...
Страница 352: ...Section 7 3 6 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Страница 356: ...Section 7 4 4 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 458: ...Section 8 1 4 Technical Specifications Section 6881091C63 F Notes ...
Страница 474: ...Section 8 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 496: ...Section 9 1 4 Technical Specifications Section 6881091C63 F Notes ...
Страница 512: ...Section 9 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 524: ...Section 9 4 14 UHF Band 1 403 470 MHz 25 40 W Bipolar PCB 8480643Z06 Schematics and Parts Lists Notes 6881091C63 F ...
Страница 530: ...Section 10 1 4 Technical Specifications Section 6881091C63 F Notes ...
Страница 546: ...Section 10 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 558: ...Section 10 4 14 UHF Band 2 450 512 520 MHz 25 40 W Bipolar PCB 8480645Z04 Schematics and Parts Lists Notes 6881091C63 F ...
Страница 564: ...Section 11 1 4 Technical Specifications 6881091C63 F Notes ...
Страница 580: ...Section 11 3 8 Troubleshooting Flow Chart for VCO 6881091C63 F Notes ...
Страница 582: ...Section 11 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 608: ...Section 12 1 4 Technical Specifications 6881091C63 F Notes ...
Страница 624: ...Section 12 3 8 Troubleshooting Flow Chart for PassPort 6881091C63 F Notes ...
Страница 626: ...Section 12 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 648: ...Section 12 4 24 UHF Band 1 403 470 MHz 25 40 W LDMOS PCB 8471223L02 Schematics and Parts Lists Notes 6881091C63 F ...
Страница 654: ...Section 13 1 4 Technical Specifications 6881091C63 F Notes ...
Страница 664: ...Section 13 2 10 UHF Band 2 450 512 520 MHz 25 40 W LDMOS Frequency Synthesis 6881091C63 F Notes ...
Страница 672: ...Section 13 4 2 Allocation of Schematics and Circuit Boards 6881091C63 F Notes ...
Страница 684: ...Section 13 4 14 UHF Band 2 450 512 520 MHz 25 40 W LDMOS PCB 8486250Z02 Schematics and Parts Lists Notes 6881091C63 F ...