User's Manual

TM-800 UHF SERVICE MANUAL
126
No output
Power supply
works normally?
Check power
supply circuit
Check Q131 &
Q110
Check driver stage.
Check transistor
Bias voltage and
low pass network
Repair
transmission
network.
Check the suited
network.
VCO maintenance
Flow chart
Replace Q128
Replace Q127
Completed
Completed
Completed
Control voltage is
normal?
Current is
normal?
Driver stage is
normal?
Normal Power?
Normal power?
Normal power?
No
Yes
Low
High
NoYes
Yes
Yes
Yes
No
Yes
No
No