JVC TV-13142 Service Manual page 46

TV-13142
TV-13142W
NO E-E (NO VIDEO AND AUDIO
FROM TUNER)
Does J701 have a
connection trouble ?
No
Do the following voltages
appear on TU601, 30V at
pin 9 and 5V at pin 7 ?
Yes
Does the set work
normally after replacing
TU601?
Yes
Is there voltage at pin
55 of IC601 9V ?
Yes
Is there VIDEO signal
at pin 57 of IC601 ?
Yes
Check Y/C BLOCK.
46
TROUBLESHOOTING GUIDE
Yes
No
No
No
No
OPERATION PCB.
Check POWER BLOCK.
Replace TU601.
Check AT 25V line.
Check IC601 and peripheral circuit.