Hitachi DV-PF33U, Service Manual

Page: 26 / 107

3-7
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?
Is the "H" level mute signals outputted to CN1601
on the Main CBA ?
CN1601 13PIN AUDIO-L
CN1601 15PIN AUDIO-R
CN1601 12PIN A-MUTE, DVD A-MUTE
CN1601 16PIN A-R-MUTE, DVD A-R-MUTE
CN1601 14PIN A-L-MUTE, DVD A-L-MUTE
IC1201 1PIN AUDIO-L
IC1201 7PIN AUDIO-R
IC1201 2PIN AUDIO-L
IC1201 6PIN AUDIO-R
Replace the DVD Main CBA or the DVD Mecha.
Replace the DVD Main CBA or the DVD Mecha.
Replace IC1201.
Check the periphery between Pins(1,7) of IC1201
and JK756, and service it if detective.
Check each line between each pin of CN1601
and each pin of IC1201 on Main CBA, and service
it if detective.
CN1601 13PIN
→
IC1201 2PIN AUDIO-L
CN1601 15PIN
→
IC1201 6PIN AUDIO-R
Are the analog audio signals inputted to each pin
of IC1201.
Are the analog audio signals inputted to each pin
of IC1201?
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the L/R OUT
terminal (JK756)?
Are the audio signals outputted to the L/R OUT
terminal (JK751)?
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Are the audio signals outputted to Pin(4,14) of
IC751?
Check the line between Q760 and OUTPUT SELECT,
and service it if detective.
Replace IC751.
Check the line between Pin(4,14) of IC751 and JK751,
and their periphery, and service it if detective.
Are the "L" pulse inputted into Pins(9,10,11) of IC751?
Yes
Yes
No
No