Motorola HT1250-LS+ Service Manual page 47

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
No
TX Cur-
rent nor-
mal?
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
U3501 at Cap C3512
Is Power
OK?
Yes
No
Replace U3501
Is Power
OK?
Yes
No
Replace Q3501
Check U3502 Pin 32
voltage, R3572-3,
etc.
Low
Check PCIC
No
Troubleshoot
VCO
4-11