Read Sharp XG-XV2E (serv.man2) Service Manual online
33
XG-XV2E/M/A
TROUBLE SHOOTING TABLE
(Continued)
Checking the clock circuit and its peripheral circuits
Yes
No
Is X8002 oscillating?
X8002 or its peripheral part faulty.
Yes
No
Is pin (3) of IC8001 oscillating?
No
Does pin (63) of IC8001 function?
C8288 or its peripheral part faulty.
IC8001 or its peripheral circuit faulty.
Yes
Check the sync signal circuit and its
peripheral circuits.
peripheral circuits.
No
Are there signals at pins (275) thru
(277) of IC8025?
(277) of IC8025?
LCP circuitry faulty.
Yes
No
No
Are there signals at pins (141), (145),
(148) and (159) of IC8020?
(148) and (159) of IC8020?
IC8025 or its peripheral circuit faulty.
Yes
Is the input having a resolution below
XGA level or in the video mode?
XGA level or in the video mode?
Yes
Yes
No
Are there signals at pins (13), (14),
(43) and (44) of TC2 connector?
(43) and (44) of TC2 connector?
IC8025 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (238) and
(239) of IC8025?
(239) of IC8025?
IC8020 or its peripheral circuit faulty.
Check the PLL circuit and its
peripheral circuits.
peripheral circuits.
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