Read Sharp LC-20E1E (serv.man2) Service Manual online
15
LC-20E1E
TROUBLE SHOOTING TABLE
(Continued)
No picture No picture
(1/3)
No picture at allNo picture at all
No TV and S-VIDEO outputNo TV and S-VIDEO output
No TV outputNo TV output
No VIDEO2 outputNo VIDEO2 output
Check all the settings microprocessor's adjust process menu.
Is in/output of
Check IC801
Is in/output of
Check IC402
Is volt
ages at
Check their
Check V1.IN line
IC801 normal?
No
and its
IC402 normal?
No
and its
pins 6,7,18 of
No
power lines.
No
and its
Yes
Yes
Yes
Yes
Yes
Yes
Yes
tuner normal?
Is in/output of
Check IC1201
Is input at pin
Check IC801,
Is ou
tput at pin
Check tuner
IC1201 normal?
No
and its
73 of IC801
No
AV1 line and
13 of tuner
3 of tuner
No
and its
perip
h
era
l parts.
perip
h
era
l parts.
perip
h
era
l parts.
perip
h
era
l parts.
perip
h
era
l
parts.
normal?
th
eir
Check LCD
Is input at pin
Check its line.
pane
l vo
ltages
an
d
wave
form.
Is the pins 2
Check IC402
and 4 of IC402
No
No
No
and its
at "H" and "L"
peripheral parts.
state?
Is the pins 65
Check its lines.
normal?
normal?
and 66 of
IC2001 at "H"
and "L"state?
Is input at pin
75 of IC801
normal?
perip
h
era
l parts.
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