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Sharp LC-20S4US Operation Wartungshandbuch Seite 29

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Seitenansicht 28
LC-20S4U-S
29
TROUBLE SHOOTING TABLE (Continued)
No TV output
No TV, video 1 and 2 output
No video output at all
No component output
No S video output
No video 2 outputNo video 1 output
Make sure the microprocessor's adjustment process menu settings are as specified.
Yes
No
No
Yes
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
Yes
Yes
Are the input
and output of
IC801 as
specified?
Check IC801
and its
peripheral
circuits.
Check the
LCD panel
voltage and
waveform.
Are the input
and output of
IC3402 as
specified?
Check
IC3402 and
its peripheral
circuits.
Is the input
at pin (93) of
IC7001 as
specified?
Is the output
at pin (89) of
IC7001 as
specified?
Check the
line in
question.
Check
IC7001 and
its peripheral
circuits.
Check the
line in
question.
Are the
voltages at
pins (6), (7)
and (9) Of
tuner as
specified?
Is the output
at pin (19) of
tuner as
specified?
Is the input
at pin (5) of
IC3402 as
specified?
Is the output
of IC3402 as
specified?
Check the
line in
question.
Check
IC3402 and
its peripheral
circuits.
Check the
line in
question.
Check the
tuner and its
peripheral
circuits.
Check the
power line.
Is the input
at pin (1) of
IC3402 as
specified?
Is the output
of IC3402 as
specified?
Check the
line in
question.
Check the
line in
question.
Check
IC3402 and
its peripheral
circuits.
Is the input
at pin (3) of
IC3402 as
specified?
Is the output
of IC3402 as
specified?
Check the
line in
question.
Check the
line in
question.
Check
IC3402 and
its peripheral
circuits.
Is the input
at pin (11) of
IC3406 as
specified?
Is the output
of IC3406 as
specified?
Check the
line in
question.
Check the
line in
question.
Check
IC3406 and
its peripheral
circuits.
Are the inputs at pins (21),
(33) and (44) of IC801 as
specified?
Check the D-Y, D-Pb and
D-Pr lines of J3405.
No video output
Seitenansicht 28
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