Troubleshooting Flow Chart For Transmitter - Motorola GP328 Plus Service Manual

5A-34
Yes
1. Check Pin Diodes
2. Check Harmonic Filter
Inspect/Repair Tx. Out-
put 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 Voltage
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
Yes
OK?
No
Replace U3501
Is Power
Yes
OK?
No
Replace Q3501
Troubleshooting Charts
Check Q3561
Low
Check PCIC
No
Troubleshoot
VCO