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Troubleshooting charts
Section 7 -29
Is information
from Q101
correct?
Is Q330 corrector
AT4.65 VDC?
Is Q314 Emit-
terAT=13VD
Is Q310 Pin 2
<0.7 VDC in RX &
>4.3 VDC in TX?
Troubleshooting Flow Chart
for Synthesizer
Start
Visual
check of the
Board OK?
Correct
Problem
Check 5V
Regulator
+5VQ323 at
Pins
3, 4
Is 14.4MHz
Signal at
Q323 Pin 1?
Check
X301,C337,C338,C336
Are signals
at PinÕs 2 of
Q323 ?
Check Q301,
L303,C303,R301,
C304 & R302
Fix
Connection
Is Connection
between Q310
Pin 2 & CN701
Pin 35 OK?
Replace C701
Remove
Shorts
Is there a short
between Pin 32 and
Pins 9 & 10 of
U201?
Replace
Q201
Replace or
resolder
necessary
components
Is RF level at
Q324
between -10 &
+5 dBm?
Are Q308,L301
C308,C310,C309
Replace Q308
See VCO
troubleshooting chart
Are Waveforms
at Pins 2 of Q323
Do Pins 9,10& 11
of Q323toggle
when channel is
changed?
Check programming
lines between Q323
Pins 9,10 & 11
Replace Q323
Check Q101
Troubleshooting
Chart
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Содержание GP2000
Страница 1: ...June 2001 GP2000 Portable Radios Service Manual 6804112J41 O ...
Страница 6: ...vi SAFETY INFORMATION ...
Страница 10: ...x ...
Страница 14: ...1 4 This page is intentionally left blank ...
Страница 31: ...IF Test Box DSK001C702 2 17 12 0 IF Test Box DSK001C702 Figure 2 15 IF Test Box Schematic ...
Страница 32: ...2 18 This page is intentionally left blank ...
Страница 58: ...5 2 This page is intentionally left blank ...
Страница 62: ...6 4 This page is intentionally left blank ...
Страница 74: ...7 12 This page is intentionally left blank ...
Страница 76: ...Section 7 14 Circuit Board Schematic Diagrams and Parts List VHF 136 174 MHz Main Board Top Side ...
Страница 77: ...Circuit Board Schematic Diagrams and Parts List Section 7 15 VHF 136 174 MHz Main Board Bottom Side ...
Страница 78: ...Section 7 16 Circuit Board Schematic Diagrams and Parts List Complete Controller Board Schematic Diagram ...
Страница 94: ...Section 7 32 This page is intentionally left blank ...