Read Sharp XG-NV6XE (serv.man4) Service Manual online
44
XG-NV6XE
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
Yes
Yes
No
No
Is there signal at pin (13) of IC8004
(or pin (6) of IC8067)?
(or pin (6) of IC8067)?
Is there signal at pin (13) of IC8004
(or pin (6) of IC8067)?
(or pin (6) of IC8067)?
Output PWB faulty.
B
B
Yes
Yes
No
No
Is there signal at the base of Q8009?
Is there signal at the base of Q8009?
IC8004 (or IC8067) or its peripheral
circuit faulty.
circuit faulty.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8011
Yes
Are there signals at TL44 and TL46?
Is there signal at pin (6) of IC8011?
Q8008 and Q8009 or there peripheral
circuit faulty.
circuit faulty.
Yes
Yes
No
No
No
Are there signals at pins (21) thru (27)
and (33) thru (40) of IC8011?
and (33) thru (40) of IC8011?
Are there signals at pins (21) thru (27)
and (33) thru (40) of IC8011?
and (33) thru (40) of IC8011?
Are there signals at pins (112) thru
(119) of IC8020?
(119) of IC8020?
IC8011 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (69) thru (73)
and (189) thru (192) of IC8020?
and (189) thru (192) of IC8020?
IC8020 or its peripheral circuit faulty.
Yes
Yes
No
Are there signals at pins (9) and (10)
of P8405 connector?
of P8405 connector?
Are there signals at pins (1) thru (10)
of IC8051?
of IC8051?
IC8051 or its peripheral circuit faulty.
No
IC8029 or its peripheral circuit faulty.
No
IC8025 or its peripheral circuit faulty.
P8405 connector or output PWB
faulty.
faulty.
Checking the
SXGA's red video
circuit and its
peripheral circuits
SXGA's red video
circuit and its
peripheral circuits
Checking the VGA's
red video circuit and
its peripheral
circuits
red video circuit and
its peripheral
circuits
Yes
No
Are there signals at pins (35) thru (42)
of P8404 connector?
of P8404 connector?
Check the video
system's red video
circuit and its
peripheral circuits
system's red video
circuit and its
peripheral circuits
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