Read Sharp XG-XV2E (serv.man2) Service Manual online
34
XG-XV2E/M/A
TROUBLE SHOOTING TABLE
(Continued)
Checking the PLL circuit and its peripheral circuits
Yes
No
Are there signals at pins (4) and (5) of
IC8026?
IC8026?
IC8020 or its peripheral circuit faulty.
Yes
No
Is there signal at pin (236) of IC8020?
No
Are there signals at pins (6) and (22)
of IC8015?
of IC8015?
IC8026 or its peripheral circuit faulty.
IC8020 or its peripheral circuit faulty.
Yes
No
Is there signal at pin (15) of IC8051?
IC8015 or its peripheral circuit faulty.
Yes
Check the video circuit and its
peripheral circuits.
peripheral circuits.
No
Is image as specified at resolution
above XGA level?
above XGA level?
Check the XGA video circuit and its
peripheral circuits.
peripheral circuits.
Yes
No
Is image as specified at resolution
below XGA level?
below XGA level?
Check the VGA video circuit and its
peripheral circuits.
peripheral circuits.
Yes
No
Hook up a video system. Is the
display as specified?
display as specified?
Check the video system's video
circuit and its peripheral circuits.
circuit and its peripheral circuits.
Yes
A
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