Service manual

TROUBLESHOOTING GUIDE
E-25
E-E AUDIO
DOES NOT APPEAR
No
No
Check VCR block.
Yes
Yes
Check IC4001 and peripheral
circuit.
Is there a signal in at
pin 1, 2 and 3 of IC7301 ?
Is there a signal in at pin 9, 11,
13 and 15 of CP7301 with each
input ?
No
Yes
Is there a signal in at pin 1, 22
and 28 of IC7303 and 56, 100
and 110 of IC4001 ?
Check IC7303, IC4009,
IC4010 and peripheral circuit.
Go to NO AUDIO ON
PLAYBACK.
No
Yes
Check IC7301 and peripheral
circuit.
Is there a signal in at
pin 7 and 8 of IC7301 ?
No
Yes
Check IC7304 and peripheral
circuit.
Is there a signal in at
pin 1 and 7 of IC7304 ?