Troubleshooting Flow Chart For Transmitter - Motorola HT Series Detailed Service Manual

34
3.4

Troubleshooting Flow Chart for Transmitter

Yes
1. Check Pin Diodes
2. Check Harmonic Filter
Inspect/Repair Tx
Output Network
Is Power
OK?
Yes
Done
December 26, 2003
UHF Troubleshooting Charts: Troubleshooting Flow Chart for Transmitter
Yes
No
Is Current
OK?
No
Yes
Done
Done
START
No Power
No
Is There B+
Check Q111
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
OK?
No
Replace U101
Is Power
Yes
OK?
No
Replace Q101
Low
Check PCIC
No
Troubleshoot
VCO
FMR-2045A-2