Sharp XG-C40XU Anleitung Seite 46

XG-C40XU/XE
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-7
Checking the S-
XGA's blue video
circuit and its
peripheral circuits
Is there signal at pin (133) of IC8606?
Yes
Are there signals at pins (45) thru (53)
as well as (56) thru (64), except for
GND, of P8606?
Yes
Are there signals at TL8048 and
TL8049?
Yes
Is there signal at pin (U15)(TL8614) of
IC8609?
Yes
Are there signals at pins (21) thru
(30) of IC8051?
Yes
IC8051 or its peripheral circuit or output
PWB faulty.
No
Terminal PWB, C8623 defective.
No
IC8606 or its peripheral circuit faulty.
No
IC8025 or its peripheral circuit faulty.
IC8020 or its peripheral circuit faulty.
No
IC8029 or its peripheral circuit faulty.
No
IC8609 or its peripheral circuit faulty.
C8704 or its peripheral circuit or signal
PWB faulty.
46
Checking the VGA's
blue video circuit
and its peripheral
circuits
No
Is there signal at pin (133) of IC8606?
Yes
Are there signals at pins (45) thru (53)
No
as well as (56) thru (64), except for
GND, of P8606?
Yes
No
Are there signals at pins (85) thru
(93) of IC8020?
Yes
No
Are there signals at pins (74) thru (83)
of IC8020?
Yes
Check the video
system's blue video
circuit and its
peripheral circuits
No
Is there signal at pin (136) of IC8606?
Yes
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