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Detailed service manual
Troubleshooting Flow Chart For Receiver (All Models Except Those With Pcb 8486458Z03) (Sheet 1 Of 2); Troubleshooting Flow Chart For Receiver - Motorola GP Series Detailed Service Manual
Professional portable radio uhf 800mhz dsm
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Also See for GP Series
:
Service manual
(300 pages)
,
Service information
(108 pages)
,
Manual
(30 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Advertisement
2-2
2.0
Troubleshooting Flow Chart for Receiver (All models except
those with PCB 8486458Z03) (Sheet 1 of 2)
A
START
Bad SINAD
Bad 20dB Quieting
No Recovered Audio
A
udio
at pin 27 of
U301?
No
Spray of inject 1st IF into
XTAL Filter
IF Freq: 45.1MHz
Yes
Audio
B
heard?
No
Check 2nd LO Control Voltage at C363
Yes
VCO
B
locked?
No
16.8 MHz
Yes
at pin 22
U301?
No
Check FGU
Yes
Check Controller
Before replacing U301, check 2nd
VCO Q320. Check VCO O/P level,
TROUBLESHOOTING CHARTS
A
Check Q320 bias
circuitry for faults.
Rotate Freq. Knob
Activity
No
on U301
LVZIF_SEL
pin?
Yes
Check controller
C351, C352.
Table of
Contents
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Chapters
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15
Theory of Operation
35
Theory of Operation
61
Theory of Operation
111
Theory of Operation/Troubleshooting Charts
327
Theory of Operation/Troubleshooting Charts
443
Table of Contents
Troubleshooting
Troubleshooting Chart
38
Troubleshooting Flow Chart for Controller
135
Troubleshooting Flow Chart for Receiver (All models except those with PCB 8486458Z03) (Sheet 1 of 2)
136
Troubleshooting Flow Chart for Receiver (Models with PCB 8486458Z03) (Sheet 1 of 2)
138
Troubleshooting Flow Chart for Receiver (Models with PCB 8486458Z03) (Sheet 2 of 2)
139
Troubleshooting Flow Chart for Transmitter
140
Troubleshooting Flow Chart for Synthesizer
141
Troubleshooting Flow Chart for VCO
142
Troubleshooting Flow Chart for Receive Message/Personal Memo Recording
143
Troubleshooting Flow Chart for Message Playback
144
Chapter 2 TROUBLESHOOTING CHARTS
343
Troubleshooting Flow Chart for Receiver (All models except those with PCB 8486686Z02)(Sheet 2 of 2)
344
Troubleshooting Flow Chart for Receiver (Models with PCB 8486686Z02) (Sheet 2 of 2)
346
Troubleshooting Flow Chart for Transmitter
347
Troubleshooting Flow Chart for Synthesizer
348
Troubleshooting Flow Chart for VCO
349
Troubleshooting Flow Chart for Receive Message/Personal Memo Recording
350
Troubleshooting Flow Chart for Message Playback
351
Chapter 2 TROUBLESHOOTING CHARTS
457
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
458
Troubleshooting Flow Chart for Transmitter
459
Troubleshooting Flow Chart for Synthesizer
460
Troubleshooting Flow Chart for VCO
461
Troubleshooting Flow Chart for PassPort Trunking
462
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