Sharp LC-20E1H - Page 19

19
LC-20E1H
LC-20E1M
Check all the settings on the microprocessor s adjust process menu.
No picture
No picture
at all
Yes
No
Are inputs
and outputs
of IC801 as
specified?
Does the LCD
controller test
pattern
appear?
Does the
video decoder
test pattern
appear?
Check IC402
and its
peripheral
parts.
Check
IC1201, its
peripheral
circuits and
the LCD
panel.
Check IC801
and its
peripheral
circuits.
Yes
No
No
No VIDEO
1 or 2
output
No
Are inputs
and outputs
of IC402 as
specified?
Check IC402
and its
peripheral
parts.
Is input at Pin
(73) of IC801
as specified?
Check IC801,
AV1 line and
their
peripheral
parts.
Yes
No
No S
VIDEO
output
No
COMPONENT
output
No
Are inputs at
Pins (71) and
(72) of IC801
as specified?
Check
SC3405, SY
line, SC line
and peripheral
parts.
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.
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?
Yes
Check the
line in
question.
TROUBLE SHOOTING TABLE (Continued)