Sharp LC-24LE150M Service Manual page 20

Led backlight tv
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LC-24LE150M
With <Component> signal input
No external input video onscreen <INPUT 2>
Is INPUT 2 selected on the input select menu screen?
Are there the Y, Pb and Pr signal inputs at pins (92), (90) and
(93) of IC3301 respectively?
Is input waveform of IC3301 normal?
Y=(92) pin, Pb=(90) pin, Pr=(93) pin
Is there LVDS signal outputs of IC3301?
( pin 43 to 52 )
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
With <HDMI> signal input
No external input video onscreen <INPUT 1>.
s I
I
N
P
U
T
1
s
e
e l
c
e t
d
o
n
h t
Are there signal outputs from SC1501 to IC3301?
A
e r
h t
e
re LVDS
s
g i
n
l a
o
u
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.
YES
YES
YES
YES
e
m
e
n
u
s
c
e r
e
n
?
YES
YES
p t
u
s t
o
I f
C
3
3
0
1
(pin 43 to 52 )
YES
No video onscreen (3)
NO
Select INPUT 2 on the input select menu screen to pick up the
right input signal.
NO
Check the line between pins (10)/(11)/(12) of J501 and pins (92)/
(90)/(93) of IC3301.
NO
Check IC3301 and its peripheral circuits.
NO
Check IC3301 and LVDS peripheral circuits.
No video onscreen (4)
N
O
S
e
e l
c
I t
N
P
U
T
1
right signal input.
NO
Check peripheral circuits between SC1501 and IC3301.
N
O
Check IC3301 and its LVDS peripheral circuits.
7 – 3
o
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n i
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