Read Sharp LC-20A2E (serv.man2) Service Manual online
LC-20A2E
13
TROUBLE SHOOTING TABLE
(Continued)
No picture
Check all the settings microprocessor's adjust process menu.
Is input at pin
74 of IC801
normal?
Check the AV2
line and their
peripheral parts.
Check the
SC2001,
SY-line, SC-line
and their
peripheral parts.
No
No VIDEO 2
output
Is input at pins
71 and 72 of
IC801 normal?
No
No S-VIDEO
output
Is input at pin
70 of IC801
normal?
Check the
V2VO line and
their
peripheral parts.
No
No line
output
Is input at pins
1, 2, 3, 56, 57
and 79 of IC801
normal?
Is output at pins
11, 13 and 16
of I4 normal?
Check IC801
and their
peripheral parts.
Check I13 and
their
peripheral parts.
Check I9 and
their
peripheral parts.
Check I4 and
their
peripheral parts.
Is output at pins
11, 13 and 16
of I13 normal?
Yes
Yes
No
No
No
No TELETEX
output
Is output at pins
44~49 of I9
normal?
Yes
No
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