Motorola GTX/LCS 2000 Service Manual page 61

Replace U5700.
Check C5738, C5724, C5713
L5709.
Troubleshooting Flow Chart
for Synthesizer
8-4 Troubleshooting
SYNTHESIZER DEVIATION
Start
No
Is AUDIO MOD
Controller
present
at C5700?
Is there
212mV on
C5750?
Check synthesizer
loop filter.
SYNTHESIZER PENDULUM
Start
Is 2.1 MHz
present
at R5731?
No
Is 16.8 MHz
present
at U5700-10?
No
Yes
Is 5V present
at U5700-13?
No
Is 5V present
at L5700?
No
Is 5V present
at U5703-2?
No
Is 9.3V
No
present
at U5703-1?
No
Replace U5702.
Yes
Yes
Yes
Replace R5731.
Yes Is 16.8MHz
present
at U5700-10?
Replace U5702.
Yes
Replace L5700.
Yes
Check L5704.
Yes
Replace U5703.
No
Check C5733
and R5715.
Yes