Sharp XV-Z2000 Anleitung Seite 41

Checking the Video Input
Feed the composite video signal to
INPUT 4. Select INPUT 4 using the
set's key or the remote controller.
Does the picture appear?
NO
Is the video signal inputted to the
pin (1) of IC3105?
YES
Are the video signals inputted to
pins (39) and (41) of IC3105?
YES
Is the video signal outputted from
pins (21), (22) and (23) of IC3105
inputted to pins (67), (68) and (69)
of IC3102?
YES
Is there any input to pins (1), (3) and (5) of IC3104?
Is there any output from pins (16), (18) and (20) of IC3104?
Is the video signal inputted to pins (43), (48) and (54) of
IC6004 and the synchronized signal inputted to pins (30)
and (31)?
Is each digital output coming on pins (64), (65), (66) and
(67) of IC6004?
Is there any output from IC8001 (DPORT)?
Check the formatter PWB.
YES
Is the picture disturbed?
NO
Check the VIDEO-IN signal
line of Q3505.
YES
Check IC3504, IC3506 and
their peripheral circuits.
YES
Check IC3501 and its
peripheral circuits.
YES
YES
YES
YES
YES
End.
1
NO
YES
NO
Check IC3102 and its peripheral circuits.
NO
Check IC3104 and its peripheral circuits.
2
NO
Check IC3104, IC6001, IC6002 and their
peripheral circuits.
NO
Check IC6004 and its peripheral circuits.
NO
Check IC8001 and its peripheral circuits.
Memo
The composite video signal is Y/C-separated by IC3506 (3 Line
COM) and the resulting signals are inputted to pins (39) and
(41) of IC3105.
The video signal is outputted from color-difference pins (21),
(22) and (23) of IC3105.
41
XV-Z2000
DT-400
Is synchronized signal
coming to pins (28) and
(29) of IC3102?
YES NO
Check IC3102 and its
peripheral circuits.
3