Sharp XG-C40XU Anleitung Seite 42

XG-C40XU/XE
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-2
Checking the clock circuit and its peripheral circuits
Is X8001 (6MHz) oscillating?
Is X8003 (1.84MHz) oscillating?
Is X8004 (22.165MHz) oscillating?
Is X8005 (18.75MHz) oscillating?
Does pin (162) of IC8001 function?
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
Checking the Sync Signal Circuit and its Peripheral Circuits
5
No
Is the sync signal of split type?
Are there signals at TP8004 and
TP8005?
No
Is the sync signal of Sync On Green
type?
Are there signals at pin (7) of IC8611?
Are there signals at pins (149) (TL80
34) and (150) (TL8035) of IC8020?
No
Does the input have a resolution lower
than XGA or is it video input?
Are there signals at pins (26) (TL8043),
(28) (TL8041) and (29) (TL8042) of
IC8020?
Are there signals at pins (13) thru
(52), except for GND, of P8405?
No
X8001 or its peripheral part faulty.
Yes
No
X8003 or its peripheral part faulty.
Yes
No
X8004 or its peripheral part faulty.
Yes
No
X8005 or its peripheral part faulty.
Yes
No
IC8001 or its peripheral circuit faulty.
Yes
5
Yes
No
Yes
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
6
IC8610 or terminal PWB defective.
IC8611 or its peripheral part faulty.
IC8025 or its peripheral part faulty.
IC8020 or its peripheral part faulty.
IC8029,IC8609 or its peripheral
part faulty.
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