Toshiba D-VR4SU Service Manual page 106

E-E AUDIO
DOES NOT APPEAR
Is there a signal in at pin 9, 11,
13 and 15 of CP7301 with each
input ?
Yes
Is there a signal in at pin 1, 22
and 28 of IC7303 and 56, 100
and 110 of IC4001 ?
Yes
Is there a signal in at
pin 1, 2 and 3 of IC7301 ?
Yes
Is there a signal in at
pin 7 and 8 of IC7301 ?
Yes
Go to NO AUDIO ON
PLAYBACK.
TROUBLESHOOTING GUIDE
No
No
No
No
E-32
Check VCR block.
Check IC7303, IC4009,
IC4010 and peripheral circuit.
Check IC4001 and peripheral
circuit.
Check IC7301 and peripheral
circuit.
D-VR4SU/D-VR4SC