Read Sharp XG-NV5XE (serv.man40) Service Manual online
42
XG-NV5XE
XG-NV5XM
XG-NV5XM
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
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.
CON4 (P8405) connector or output
PWB faulty.
PWB faulty.
Yes
No
Are there signals at pins (85) thru (93)
of IC8020?
of IC8020?
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?
Is there signal at pin (3) of IC8004?
LCP circuitry faulty.
Is there signal at the base of Q8004?
Is there signal at the base of Q8004?
IC8004 or its peripheral 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 (112) thru
(119) of IC8020?
(119) of IC8020?
IC8009 or its peripheral circuit faulty.
Are there signal at pins (1) and (2) of
CON4 (P8405) connector?
CON4 (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 S-
VGA's blue video
circuit and its
peripheral circuits
VGA'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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