TC-610P Service Manual
90
Receive Circuit
Start
No receive
Normal power
supply?
Yes
No
Check power
supply circuit
Appropriate
squelch level?
Rx LED lit?
Correct Rx
frequency?
Correct Rx
signaling?
Speaker works?
PA works?
Volume switch
works?
Pin 29 and Pin
52 of ICU200 output
normally?
Demodulator
component
works?
IF and Mixer
circuit works?
RF and Mixer
circuit works?
Change Rx
frequency
Change
squelch level
Replace Rx
LED D601
Change Rx
signaling
Replace speaker
Check PA circuit
Replace volume
switch
Check audio
processing circuit
Check or replace
CD300, CF300
Check Q 105,
U200 ( P12,P21),
XF1
Check local
oscillator VCO
circuit, Q501
Check BPF
circuit, Q500
Check antenna
connection
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
End
Yes
Yes
No
No
No
No
No
No
No
