JVC XV-1000BK, Service Manual

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Is video
signal output from
J651 composite
terminal?
Is video
signal output from
J652 S terminal?
8. Video Volume
YES
NO
Is clock
signal input to
IC551"9"?
* Service tips
(1) The disc playback screen is in the normal condition but graphics in the "ON SCREEN"
mode are abnormal => Replace IC553.
(2) Only 1/4 compressed playback screen of DVD or video-CD is abnormal => Replace IC552.
YES
YES
YES
YES
NO
NO
NO
NO
NO
YES
Power
supplied correctly
to each IC?
to Power Supply
Volume
Check L681,
L682 and IC651.
OK
Is signal
output from CN651"2"
and "4"?
Check the insertion of
L680, L683, IC651,
IC655 and CN651.
* +5V power for video section is
supplied from IC654.
Check I/O voltage of IC654.
Is digital
signal output from
IC551"1" to"8", "10" and
"11"?
Check
IC551.
Check
IC451.
Check
IC451.