
TROUBLESHOOTING GUIDE
NO PB AUDIO (Hi-Fi)
Yes
No
No
Yes
No
Yes
Yes
No
Does audio appear on E-E ?
Is the voltage at pin 58 of
IC5501 DC9V and pins 25
and 40 of IC5501 DC5V ?
Check Power circuit.
Check AUDIO HEAD for debris
or stains.
Check CP4001 and peripheral
circuit.
Is PG SHIFTER
Adjustment 6.5H ?
Adjust PG SHIFTER.
No
Yes
Does AUDIO signal
appear at pins 53
and 57 of IC5501 ?
Check pin 36 of IC5501.
No
Yes
Does Hi-Fi H. SW
signal appear at pin
27 of IC5501 ?
Check pin 19 of IC1001.
Check IC5501.
Is Hi-Fi ENVELOPE
at TP5501 more
than 750mVp-p ?
E-28