Sharp Aquos LC-46D92U, Руководство по обслуживанию

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LC-46D92U/LC-52D92U
4 – 1
LC-46D92U
Service Manual
CHAPTER 4.
TROUBLESHOOTING TABLE
[1] TROUBLE SHOOTING TABLE
No video (1)
COMPOSITE: No external input video
[INPUT-1]
COMPOSITE: No external input video
[INPUT-2]
Is INPUT-1 selected on the input select
menu screen? Is the INPUT-SELECT for
the input signal? Is INPUT-2 selected on the input select
menu screen?
YES
NO
YES
NO
Select INPUT-1 on the input
select menu screen for the
right input signal. Select INPUT-2 on the
input select menu
screen.
Does the INPUT-1
V2.PLUG detection func-
tion? Does the INPUT-2
V3PLUG detection func-
tion?
Check the line between pin
(6) of input terminal (J508)
and pin (76) of IC501
(AV_SWITCH). Check the line between
pin (6) of input terminal
(J509) and pin (2) of
IC501 (AV_SWITCH).
Is there the COMPOSITE video signal input
at pin (71) of IC501 (AV_SWITCH)? Is there the COMPOSITE video signal
input at pin (3) of IC501 (AV_SWITCH)?
YES
NO
YES
NO
Check the line between pin
(7) of J508 and pin (71) of
IC501. Check the line between
pin (7) of J509 and pin
(3) of IC501.
Is there the COMPOSITE video signal output at pin (60) of IC501? Check IC501 and
its peripheral cir-
cuits.
NO
YES
Is there the COMPOSITE video signal output at pin (2) of connector (SC501) on the TERMINAL unit? Check the line
between IC501 and
SC501 (Q501 thru
Q504, etc.).
NO
YES
Is there the COMPOSITE video signal input at pin (2) of connector (SC1101) on the main unit?
NO
Check the SC501
and SC1101 con-
nectors.
YES