Sharp Notevision XG-NV7XU, Service Manual

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41
XG-NV7XU
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-2
Checking the sync signal circuit and its peripheral parts
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
B
Is the sync signal of separate type?
No
Are there signals at TP4 and TP5? IC302 or terminal unit defective.
Is the sync signal SYNC ON GREEN?
No
Is there signal at pin (7) of IC8036?
IC23, IC34, IC36 or peripheral part
defective.
No
Are there signals at pins (149)(TL8034)
and (150)(TL8035) of IC8020?
IC8025 or peripheral part defective.
Is the input a lower-than-XGA-resolution
signal or a video signal?
Yes
No Are there signals at pins (26)(TL8043),
(28)(TL8041) and (29)(TL8042) of IC8020?
IC8020 or peripheral part defective.
No
Are there signals at even-numbered pins
from (52) thru (100) of IC8503?
IC8029 or peripheral part defective.
Checking the PLL circuit and its peripheral parts
No
Are there signals at pins (6) and (22) of
IC8015?
Yes
No
No Are there signals at pins (18) and (19) of
IC8015?
Yes
Checking the video circuit and its
peripheral parts.
Yes
Is the higher-than-XGA-resolution display
as specified?
Yes
Is the lower-than-XGA-resolution display
as specified?
Yes
No Is the display as specified with VCR
connected?
IC8025 or peripheral part defective.
IC8015 or peripheral part defective.
Is there a panel link input?
Is there a panel link input?
Go to "Checking the video circuit and its
peripheral parts".
Go to "Checking the SXGA video circuit
and its peripheral parts".
No
Go to "Checking the aVGA video circuit
and its peripheral parts".
No
No
No
C
A
D
Yes
E
C
No
No