Service Manual

33
Troubleshooting Flow Chart
Tx Section
No
transmission
Start
Normal Tx
power supply?
D602 glows
red?
Check Tx
power supply
Tx VCO is
locked?
Check Tx
VCO
Check Tx
channel
Replace
D602
No voice during
transmission
Tx LED not
light
Check antenna
connection
Check Q400, Q401,
Q402 and Q403
Yes
No
Check APC
control circuit
Low Tx
power
Check voice channel
(MIC, VR200 and
D104)
Replace
D602
Yes
No No