Read Sharp LC-20B4E (serv.man8) Service Manual online
18
LC-20B4E
TROUBLE SHOOTING TABLE
(Continued)
No picture (2/3)
Check all the settings microprocessor's adjust process menu.
Is input at pin
(14) of IC806
normal?
Check the V2_V
line and its
peripheral parts.
No
No VIDEO 1
output
Check the SY-line,
SC-line and their
peripheral parts.
Is input at pin (9)
of IC806 and pin
(1) of IC803
normal?
No
No S-VIDEO
output
Check IC1201
and its
peripheral parts.
No
Yes
Yes
No TELETEXT
output
Is input at pins
(136), (137), (138),
and (142) of
IC1201 normal?
No
Check the R, G
and B line.
Is output at pins
(57)~(59) of IC1601
normal?
No
Yes
Check V2VO line
and its peripheral
parts.
Is input at pin (21) of
IC1601 normal?
Check IC1601 and its
peripheral parts.
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