Troubleshooting Flow Chart For Transmitter - Motorola Professional Radio Service Manual

3-12
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
No
Is There B+
Bias for Ant
switch
Is Control Volt-
age High or Low
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 Q101
UHF Troubleshooting Charts
Check Q111
Low
Check PCIC
No
Troubleshoot
VCO