Service manual

28
LC-13E1U/UB/UW
LC-15E1U/UB/UW
TROUBLE SHOOTING TABLE (Continued)
No picture
at all
No
Are inputs
and outputs
of IC801 as
specified?
Check all the settings on the microprocessor
’s adjust process menu.
No picture
Check IC402
and its
peripheral
parts.
No TV
output
Yes
No
Are voltages
at pins (6), (7)
and (9) of
tuner as
specified?
Check the
power line.
Yes
No
Is output at
pin (19) of
tuner as
specified?
Check the
tuner and its
peripheral
parts.
No
Is input at pin
(3) of IC402
as specified?
Check the
line in
question.
Yes
Check IC402
and its
peripheral
parts.
Yes
No
Are pins (2)
and (4) of
IC402 at “H”
and “L”
respectively?
Are pins (65)
and (66) of
IC2001 at “H”
and “L”
respectively?
No S
VIDEO
output
No
Are inputs at
pins (71) and
(72) of IC801
as specified?
Check
SC3405, SY
line, SC line
and peripheral
parts.
No
COMPONENT
output
No
Is input at
pins (4), (5),
(6) and (75)
of IC801 as
specified?
Check J3404,
DVD-Y line,
PB line, PR
line and
peripheral
parts.
Yes
Check the
line in
question.
No VIDEO
1 or 2
output
Yes
No
Are inputs
and outputs
of IC402 as
specified?
Check IC402
and its
peripheral
parts.
No
Is input at pin
(73) of IC801
as specified?
Check IC801,
AV1 line and
their
peripheral
parts.
Yes
Check pin (88)
of IC2001, or
check SSW
line.
Yes
Yes
No
Is the test-
pattern of
LCD
controller
displayed?
Check
IC1201, its
peripheral
parts and
LCD panel.
No
Check IC801
and its
peripheral
parts.
Is the test-
pattern of
video
decoder
displayed?