Read Sharp XG-XV2E (serv.man2) Service Manual online
36
XG-XV2E/M/A
TROUBLE SHOOTING TABLE
(Continued)
Yes
Yes
No
No
Is there signal at pin (8) of IC8004?
Is there signal at pin (8) of IC8004?
LCP circuitry faulty.
Yes
Yes
No
No
Is there signal at pin (3) of IC8007?
Is there signal at pin (3) of IC8007?
IC8004 or its peripheral circuit faulty.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8010?
Is there signal at pin (6) of IC8010?
IC8007 or its peripheral circuit faulty.
Yes
No
No
Are there signals at GI1A0 thru -7 and
GI1B0 thru -7 of IC8025?
GI1B0 thru -7 of IC8025?
Are there signals at VAG0 thru -7 of
IC8020?
IC8020?
IC8010 or its peripheral circuit faulty.
Yes
No
Are there signals at GI2A0 thru -7 and
GI2B0 thru -7 of IC8025?
GI2B0 thru -7 of IC8025?
IC8020 or its peripheral circuit faulty.
Yes
No
Are there signals at R1 thru -10 and
G1 thru -10 of IC8031?
G1 thru -10 of IC8031?
IC8025 or its peripheral circuit faulty.
Yes
No
Are there signals at the bases of Q19
and Q21?
and Q21?
IC8031 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (5) and (7) of
TC2?
TC2?
Q13, Q18 thru Q21 or their peripheral
parts faulty.
parts faulty.
TC2 connector or output PWB faulty.
Checking the XGA's
green video circuit
and its peripheral
circuits
green video circuit
and its peripheral
circuits
Checking the VGA's
green video circuit
and its peripheral
circuits
green video circuit
and its peripheral
circuits
Yes
No
Are there signals at VBR0 thru -7 of
IC8020?
IC8020?
R8277, R8278 or LCP circuitry faulty.
Check the video
system's green
video circuit and its
peripheral circuits
system's green
video circuit and its
peripheral circuits
C
C
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