HYT TM-800K, Service Manual

Page: 96 / 128

TM-800K Service Manual
94
Power supply of AF
IC126 is normal?
No receive
Output of
IC126 is normal?
Output of electronics
volume IC125 is
normal?
Check IC126
Output of IC104 is
normal?
The 2nd local
oscillator works
normally?
L135 works normally?
Is there any input
in IC119 PIN16 IF?
Is there any
RF signal?
Replace L135
Check X105 (UHF)
or Q120 (VHF)
Check IC125
Check work status of
IC119 &peripheral
components
Check VCO
FPC & Speaker
work normally?
No
No
No
Check Q601 pass
Yes
Output of IC106 is
normal?
Check IC104
Output of IC121 is
normal?
Check IC106
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
Check power supply
circuit.