Sharp LC-20E1E (serv.man2) Service Manual ▷ View 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.
16
LC-20E1E
TROUBLE SHOOTING TABLE
(Continued)
No picture
(2/3)
No S-VIDEO outputNo S-VIDEO output
No VIDEO1 outputNo VIDEO1 output
No TELETEXT output
Check all the settings microprocessor's adjust process menu.
Is input at pin
Check SY-line,
Is input at pin
Check AV2
Is input at pins
Check
IC1203
1 of IC402 and
No
SC-line
and
their
74 of IC801
No
line and its
2,5,11,14 of
Yes
and its
pin 71 of IC801
peripheral parts.
normal?
peripheral parts.
peripheral parts.
peripheral parts.
peripheral parts.
IC1203 normal?
Is output at pins
Check
3~5 of
Yes
connection
SC1602 normal?
cable.
Is output at pins
Is output at pins
Is input at pin
Check IC1601
1 and 7 of
Yes
Yes
57~59 of
No
No
No
No
No
21 of IC1601
Yes
and its
IC1619 and pin
IC1601 normal?
normal?
peripheral parts.
normal?
Check IC1619,
IC1690 and their
Check the
Check V2VO
line and its
normal?
1 of IC 1620
R,G,B line.
17
LC-20E1E
TROUBLE SHOOTING TABLE
(Continued)
No picture
(3/3)
Colour is unusual
No picture image inversion
Gradation defect
Check all the settings microprocessor's adjust process menu.
Is output of
Check R1202
Is in/output of
Check R1209
Is output V0,V7,
V17,V21,V32,
V64,V122,V176,
V235,and V255
normal?
Check IC1106~
IC1108, IC1114
IC1115 and their
R0~R7
NoNo
and its
SPIO and
NoNo
NoNo
and its
normal?
normal?
normal?
peripheral parts.
peripheral parts.
peripheral parts.
peripheral parts.
peripheral parts.
peripheral parts.
SPIO normal?
Yes
Is output of
Is output of
Check R1204
Is output of U/D
Check IC
1206
G0~G7
Yes
B0~B7
No
NoNo
and its
normal?
NoNo
IC1207,Q1201
and their
Check R1203
and its
Yes
18
LC-20E1E
TROUBLE SHOOTING TABLE
(Continued)
No sound
(1/2)
No sound from front speakers
No sound from headphone
No sound from
output line
Check all the settings microprocessor's adjust process menu.
Is the pin 53 of IC2001
Muting effect is on.
Is the pin 52 of IC2001
Muting effect is on.
Is output at pins 33
Check IC1901 and
its
in the "L" state?
No
Check the FSMUTE
in the "L" state?
No
Check the HP_MUTE
and 34 of IC1901
No
peripheral parts.
Yes
Yes
Yes
Yes
l
ine.
line.
normal?
Yes
Is output at pins 27 and
Check IC1901 and its
Is output at pin
s 24 and
Check IC1901 and its
Is output at pins 1 and
Check IC3500 and its
28 of IC1901 normal?
No
peripheral parts.
25 of IC1901 normal?
No
peripheral parts.
7 of IC3500 normal?
No
peripheral parts.
Yes
Yes
Is output at pins 1 and
Check IC1903 and its
Is output at pins
1 and
Check IC304 and its
7 of IC1903 normal?
No
peripheral parts.
7 of IC304 normal?
No
peripheral parts.
Ye
s
Is output at pins 8 and
Check IC3305 and its
Check headphone jack
12 of IC3305 normal?
No
peripheral parts.
and connection cable.
Check front speakers
and connection cable.
Click on the first or last page to see other LC-20E1E (serv.man2) service manuals if exist.