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TROUBLESHOOTING GUIDE
AUDIO CAN NOT BE
RECORDED
L4005 is broken or shorted.
Replace IC1002.
Yes
No
Yes
Yes
No
No
No
Yes
Is there AUDIO signal
at pin 11 of IC4001 ?
No
Yes
Is BIAS level O.K
at L4005 ?
Is the voltage at pin 2
of L4005 5.8V ?
Check POWER circuit.
Is the voltage at pin 29
of IC1002 about 5V ?
Is there AUDIO signal
at pin 5 of CP4002 ?
Check the circuit between pin4
of IC4001 to pin 5 of CP4002.
Replace IC4001.
Check the lead wire and
connector to A/C HEAD.
E-19