Motorola HT1250-LS+ Service Manual page 53

Maintenance
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
Is TX
No
Current
normal?
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 C131
Is Power
OK?
Yes
No
Replace U101
Is Power
OK?
Yes
No
Replace Q101
Check U102 Pin
32 voltage, R101,
R102, etc.
Low
Check PCIC
No
Troubleshoot
VCO
4-17