Read Sharp XG-NV6XE (serv.man4) Service Manual online
46
XG-NV6XE
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-5
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Are there signals at TL48 and TL49?
Yes
Yes
No
No
No
Yes
No
Are there signals at pins (74) thru (83)
of IC8020?
of IC8020?
IC8020 or its peripheral circuit faulty.
Yes
Yes
No
No
No
IC8020 or its peripheral circuit faulty.
P8405 connector or output PWB
faulty.
faulty.
Yes
No
Are there signals at pins (15) thru (22)
of P8404 connector?
of P8404 connector?
Check the video
system’s blue video
circuit and its
peripheral circuits.
system’s blue video
circuit and its
peripheral circuits.
Is there signal at pin (3) of IC8004 (or
pin (6) of IC8065)?
pin (6) of IC8065)?
Is there signal at pin (3) of IC8004 (or
pin (6) of IC8065)?
pin (6) of IC8065)?
Output PWB faulty.
Is there signal at the base of Q8005?
Is there signal at the base of Q8005?
IC8004 (or IC8065) or its peripheral
circuit faulty.
circuit faulty.
Is there signal at pin (6) of IC8009?
Is there signal at pin (6) of IC8009?
Q8004 and Q8005 or there peripheral
circuit faulty.
circuit faulty.
Are there signals at pins (21) thru (27)
and (33) thru (40) of IC8009?
and (33) thru (40) of IC8009?
Are there signals at pins (21) thru (27)
and (33) thru (40) of IC8009?
and (33) thru (40) of IC8009?
Are there signals at pins (85) thru (93)
of IC8020?
of IC8020?
IC8009 or its peripheral circuit faulty.
Are there signal at pins (1) and (2) of
P8405 connector?
P8405 connector?
IC8051 or its peripheral circuit faulty.
Are there signal at pins (21) thru (30)
of IC8051?
of IC8051?
IC8018 or its peripheral circuit faulty.
Checking the
SXGA’s blue video
circuit and its
peripheral circuits
SXGA’s blue video
circuit and its
peripheral circuits
Checking the VGA’s
blue video circuit
and its peripheral
circuits
blue video circuit
and its peripheral
circuits
D
D
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