Motorola GP2000 Service Manual

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
NO
YES
NO
YES
NO
NO
NO
YES
YES
NO
NO
YES
YES
NO
YES
YES
NO
YES
YES
YES
NO
NO
NO
NO
YES
NO
YES
YES

Motorola GP2000 Specifications

General

Brand	Motorola
Model	GP2000
Category	Portable Radio
Language	English