Read Sharp XG-XV2E (serv.man2) Service Manual online
35
XG-XV2E/M/A
TROUBLE SHOOTING TABLE
(Continued)
Yes
Yes
No
No
Is there signal at pin (13) of IC8004?
Is there signal at pin (13) of IC8004?
LCP circuitry faulty.
B
B
Yes
Yes
No
No
Is there signal at pin (3) of IC8008?
Is there signal at pin (3) of IC8008?
IC8004 or its peripheral circuit faulty.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8011
Is there signal at pin (6) of IC8011?
IC8008 or its peripheral circuit faulty.
Yes
No
No
Are there signals at RI1A0 thru -7 and
RI1B0 thru -7 of IC8025?
RI1B0 thru -7 of IC8025?
Are there signals at VAR0 thru -7 of
IC8020?
IC8020?
IC8011 or its peripheral circuit faulty.
Yes
No
Are there signals at RI2A0 thru -7 and
RI2B0 thru -7 of IC8025?
RI2B0 thru -7 of IC8025?
IC8020 or its peripheral circuit faulty.
Yes
No
Are there signals at R1 thru -10 and
G1 thru -10 of IC8030?
G1 thru -10 of IC8030?
IC8025 or its peripheral circuit faulty.
Yes
No
Are there signals at the bases of Q15
and Q17?
and Q17?
IC8030 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (9) and (11)
of TC2?
of TC2?
Q13, Q14 thru Q17 or their peripheral
parts faulty.
parts faulty.
TC2 connector or output PWB faulty.
Checking the XGA's
red video circuit and
its peripheral
circuits
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 VBR0 thru -7 of
IC8020?
IC8020?
R8275, R8276 or LCP circuitry faulty.
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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