HYT TC-610P Service Manual page 92

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