Motorola GP338 Plus - Troubleshooting Flow Chart for Transmitter

5D-34 Troubleshooting charts
START
No Power
Is There B+
Bias for Ant
switch
Check Q111
Is Current
OK?
Is Control Voltage
High or Low
Check PCIC
1. Check Pin Diodes
2. Check Harmonic Filter
Inspect/Repair Tx. Out-
put Network
Is Power
OK?
Done
Check Drive to
Module
Is Drive
OK?
Troubleshoot
VCO
Inspect PA Network/Check
Power Out of U101 at Cap
C160
Is Power
OK?
Replace U101
Is Power
OK?
Replace Q101
Done
Done
No
Yes
Yes
No
No
Yes
Low
High
No
Yes
Yes
No
Yes
No
Troubleshooting Flow Chart for Transmitter