Troubleshooting Flow Chart For Transmitter - Motorola GP88s Service Manual

9A-54
Yes
1. Check Pin Diodes
2. Check Harmonic Filter
Inspect/Repair Tx.
Output Network
Is Power
OK?
Yes
Done

Troubleshooting Flow Chart for Transmitter

Yes
No
Is Current
OK?
No
Done
Done
START
No Power
Is There
No
B+ Bias for
Ant switch
CR101
Is Control Voltage
High or Low at
C119
High
Check Drive to
Module
Is Drive
OK?
Yes
Inspect PA Network/
Check Power Out of
U101 at Cap C160
Is Power
Yes
OK?
No
Replace U101
Is Power
Yes
OK?
No
Replace Q110
Troubleshooting charts
Check Q111
Low
Check PCIC
No
Troubleshoot
VCO