Hitachi DV-PF7E Service Manual page 38

FLOW CHART NO.10
Audio is not outputted.
Set the disc on the disc tray, and playback.
Are the analog audio signals outputted to each pin
of CN1601 on Main CBA?
CN1601 14PIN AUDIO-L
CN1601 16PIN AUDIO-R
Are the analog audio signals inputted to each pin
of IC1201.
IC1201 6PIN AUDIO-L
IC1201 2PIN AUDIO-R
Is the "H" level mute signals outputted to CN1601
on the Main CBA ?
CN1601 13PIN DVD-A-MUTE
CN1601 15PIN DVD-A(R)-MUTE
Are the analog audio signals outputted to each pin
of IC1201?
IC1201 7PIN AUDIO-L
IC1201 1PIN AUDIO-R
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the L/R OUT
terminal (JK751)?
Are the audio signals outputted to Pins(1, 3) of
JK101 (Scart jack)?
Are the audio signals outputted to Pin(14,15) of
IC751?
Are the "H" pulse inputted into Pins(9,10,11) of IC751?
Replace IC501.
Yes
Yes
Yes
Yes
No
No
No
No
Replace the DVD Main CBA or the DVD Mechanism.
Check each line between each pin of CN1601
and each pin of IC1201 on Main CBA, and service
it if defective.
No
CN1601 14PIN → IC1201
CN1601 16PIN → IC1201
No
Replace the DVD Main CBA or the DVD Mechanism.
No
Replace IC1201.
No
Check the periphery between Pins(1,7) of IC1201
and JK751, and service it if defective.
Yes
Check the line between Pin(14,15) of IC751 and JK101,
and their periphery, and service it if defective.
Yes
Replace IC751.
3-11
6PIN AUDIO-L
2PIN AUDIO-R