28
LC-15AV6U
TROUBLESHOOTING 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
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
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.
Check the
line in
question.
Are the
voltages at
pins (3), (9)
and (15) of
tuner as
specified?
Is the output
at pin (17) 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.
No
Yes
No
Yes
Is the input
at pin (24) of
S terminal
detector
IC2001 as
specified?
Are the
inputs at pins
(31) and (42)
pf IC801 as
specified?
Check the
related line.
Check the
related line.
Check
IC801 and its
peripheral
circuits.
No video output
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.
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