Motorola GP344 - Page 48

2-6 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. Output
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
Figure 2-5 Troubleshooting Flow Chart for VCO UHF1 and UHF2