JVC TV-13142 Service Manual page 43

AUDIO CAN NOT BE
RECORDED
Is BIAS level O.K at T4001?
60Vp-p
Yes
Is there AUDIO signal at
pin 76 of IC4001 ?
Yes
Is there AUDIO signal
at pin 11 of IC4001 ?
Yes
Is there signal at pin 10
of IC4001 ?
Yes
Check the lead wire and connector
to A/C HEAD.
TROUBLESHOOTING GUIDE
No
Is the voltage at pin 77
of IC4001 5V ?
Yes
L4003 is broken or shorted.
Check peripheral circuit.
No
No
No
No
Check POWER BLOCK.
Check the circuit between audio out of
Tuner and pin 76 of IC4001.
Check IC4001 and the peripheral
circuit.
Replace IC4001.
TV-13142
TV-13142W
43