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