Sharp XV-Z2000E (serv.man12) Service Manual ▷ View online
42
XV-Z2000
DT-400
DT-400
Feed the composite video signal to
INPUT 4. Select INPUT 4 using the
set's key or the remote controller.
INPUT 4. Select INPUT 4 using the
set's key or the remote controller.
Does the picture appear?
Is the picture disturbed?
End.
YES
YES
NO
NO
Is the video signal inputted to the
pin (1) of IC3105?
pin (1) of IC3105?
YES
Check the VIDEO-IN signal
line of Q3505.
line of Q3505.
NO
Is there any input to pins (1), (3) and (5) of IC3104?
YES
Check IC3102 and its peripheral circuits.
NO
Is there any output from pins (16), (18) and (20) of IC3104?
YES
Check IC3104 and its peripheral circuits.
NO
Is the video signal inputted to pins (43), (48) and (54) of
IC6004 and the synchronized signal inputted to pins (30)
and (31)?
IC6004 and the synchronized signal inputted to pins (30)
and (31)?
YES
Check IC3104, IC6001, IC6002 and their
peripheral circuits.
peripheral circuits.
NO
Is each digital output coming on pins (64), (65), (66) and
(67) of IC6004?
(67) of IC6004?
YES
Check IC6004 and its peripheral circuits.
NO
Is there any output from IC8001 (DPORT)?
Check the formatter PWB.
YES
Check IC8001 and its peripheral circuits.
NO
YES
Check IC3501 and its
peripheral circuits.
peripheral circuits.
YES
Checking the Video Input
Check IC3102 and its
peripheral circuits.
peripheral circuits.
1
3
NO
YES
Is synchronized signal
coming to pins (28) and
(29) of IC3102?
coming to pins (28) and
(29) of IC3102?
2
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 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.
Are the video signals inputted to
pins (39) and (41) of IC3105?
pins (39) and (41) of IC3105?
YES
YES
Is the video signal outputted from
pins (21), (22) and (23) of IC3105
inputted to pins (67), (68) and (69)
of IC3102?
pins (21), (22) and (23) of IC3105
inputted to pins (67), (68) and (69)
of IC3102?
Check IC3504, IC3506 and
their peripheral circuits.
their peripheral circuits.
43
XV-Z2000
DT-400
DT-400
Checking the SOG Circuit
Measure the pin (7) of IC5001
with an oscilloscope.
with an oscilloscope.
This is the failure of the SOG
synchronization separator circuit.
synchronization separator circuit.
Is there the Y signal including sync
signal?
signal?
Measure the pin (2) of Q5001
with an oscilloscope.
with an oscilloscope.
Is the composite synchronized
signal regenerated at proper timing?
signal regenerated at proper timing?
NO
Is there any output from the pin
(25) of IC3102?
(25) of IC3102?
NO
The SOG circuit is normal.
End.
YES
YES
YES
Check Q3110 and its
peripheral ciruits.
peripheral ciruits.
NO
44
XV-Z2000
DT-400
DT-400
Input the S terminal (Y, C) signal to
INPUT 3. Select INPUT 3 with the
keys on the main body or the
remote controller.
INPUT 3. Select INPUT 3 with the
keys on the main body or the
remote controller.
Does the picture appear?
Is the picture disturbed?
End.
Is the video signal inputted to the
pins (43) and (44) of IC3105?
pins (43) and (44) of IC3105?
YES
NO
NO
NO
YES
NO
YES
Check the input side and its
peripheral ciruits.
Check the Y,C signal line.
peripheral ciruits.
Check the Y,C signal line.
Checking the S terminal input.
Check IC3105 and its
peripheral circuits.
peripheral circuits.
1
YES
3
Is the video signal outputted
from pins (21), (22) and (23)
of IC3105 inputted into pins
(67), (68) and (69) of IC3102?
from pins (21), (22) and (23)
of IC3105 inputted into pins
(67), (68) and (69) of IC3102?
45
XV-Z2000
DT-400
DT-400
Checking the Sync Signal
Is the horizontal synchronized
signal on pin (6) of IC6003?
signal on pin (6) of IC6003?
Is the vertical synchronized signal
on pin (6) of IC6009?
on pin (6) of IC6009?
Is the synchronized signal
outputted from IC5009, IC5005,
IC5006, IC5007 and IC5008?
outputted from IC5009, IC5005,
IC5006, IC5007 and IC5008?
Are the timing of both vertical and
horizontal synchronized signals
correct?
horizontal synchronized signals
correct?
Is the horizontal synchronized
signal on pin (30) of IC6004?
signal on pin (30) of IC6004?
Is the vertical synchronized signal
on pin (31) of IC6004?
on pin (31) of IC6004?
The sync signal is normal.
End of checking.
End of checking.
YES
NO
Check the of the signal input part.
NO
YES
YES
YES
YES
NO
YES
Check each IC and their peripheral
circuits.
circuits.
NO
Check IC6001, IC6002 and their
peripheral circuits.
peripheral circuits.
NO
Set the signal source appropriately.
NO
2
Is the signal generator (input
source) correct?
source) correct?
YES
IC8001 and its periphery is
defective.
defective.
NO
Is the horizontal synchronized
signal on pin (66) of IC6004?
signal on pin (66) of IC6004?
Is the vertical synchronized signal
on pin (64) of IC6004?
on pin (64) of IC6004?
YES
YES
NO
Failure of IC6004 and its
peripheral circuit.
peripheral circuit.
NO
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