Sharp 27DV-S100 Service Manual page 71

DVD picture failure
Place the disc on the disc tray and play
it back.
YES
Is there the playback video signal at
NO
pin (1) of connector CN802 on the
DVD main unit?
YES
Are there the playback video signal,
NO
luminance signal and chroma signal
at pins (5), (1) and (3) of connector
DA on the DVD sub unit?
YES
Are the signals at pins (7)/(8)
and (1)/(3)/(28) of IC1001 at
"H" and "5V" levels,
respectively?
YES
Check the lines between
pins (27), (23), and (25) of
IC1001 and pins (5), (1) and
(3) of connector DA.
Are there the playback video signals at
NO
pins (22), (24) and (26) of terminal unit
IC1301?
YES
YES
Are there the playback video signals at
pins (53), (56) and (58) of IC1301?
NO
NO
2
Are there the I C clock and data signals
at pins (33) and (34) of IC1301?
YES
NO
Is the 9V supply voltage applied at pin
(42) of IC1301?
YES
Replace IC1301.
FLOW CHART No. 3-6
Check the DVD main unit and DVD
mechanism unit.
Are there the playback video
signals at pins (27), (23) and (25)
of IC1001?
YES NO
Check the lines between
pins (9), (7) and (5) of
connector CA on the DVD
sub unit and pins (2), (6)
and (4) of IC1001.
NO
Check IC1001 and its
peripheral circuits.
Check the lines between pins (5), (1)
and (3) of connector DA and pins
(22), (24) and (26) of IC1301.
Check the lines from IC4401 thru
IC1401 to IC8850 of the TV section.
Check the lines from pins (33) and
(34) of IC1301 to pins (17) and (18) of
IC2001.
Check the PC9V line.
DVD sound failure
Place the disc on the disc tray and play
it back.
YES
Is there the playback audio signal at pin
NO
(6) of connector CN801 on the DVD
main unit?
YES
Are there the playback audio signal at
NO
pins (7) and (9) of connector DA on the
DVD sub unit?
YES
Are there the playback
audio signals at pins (3)
and (5) of IC1102?
NO
Are there the playback
audio signals at pins (13)
and (16) of IC1101?
NO
Is there the playback digital
signal at pin (2) of IC1101?
NO
Check the line between pin
(24) of connector CB and pin
(2) of IC1101.
NO
Are there the playback audio signals at pins
(23) and (25) of IC1301 on the terminal unit?
YES
YES
Are there the playback audio signals at
pins (52) and (54) of IC1301?
NO
2 NO
Are there the I C clock and data signals
at pins (33) and (34) of IC1301?
YES
NO
Is the 9V supply voltage applied at pin
(42) of IC1301?
YES
Replace IC1301.
FLOW CHART No. 3-7
Check the DVD main unit and
DVD mechanism unit.
Are there the playback audio signals at
pins (1) and (7) of IC1102?
NO YES
Check the line from pins (1)
and (7) of IC1102 to pins (7)
and (9) of connector DA.
YES
Check IC1102 and its
peripheral circuits.
YES
Check the lines from pins
(13) and (16) of IC1101 to
pins (3) and (5) of IC1102.
YES
Check IC1101 and its
peripheral circuits.
Check the lines from pins (7) and (9) of
connector DA to pins (23) and (25) of
IC1301.
Check the lines between IC3001 and
IC3201 of the TV section.
Check the lines from pins (33) and (34) of
IC1301 to pins (17) and (18) of IC2001.
Check the PC9V line.