Sharp AQUOS LC-22AD1E, Service Manual

Page: 18 / 111

18
LC-22AD1E
TROUBLE SHOOTING TABLE (Continued)
No picture
Becomes dark
Time passes, becomes dark
Becomes white
Chec
k all the settings microprocessor’s adjust process menu.
Is source GND nor
mal?
(SC4901, SC4902)
Chec
k SC4901,
SC4902 and their per
ipheral
par
ts
.
Is CSCOM w
a
v
ef
or
m
nor
mal?
(SC4901 1/2 Pin)
Chec
k IC4706,
IC4702, Q4701 and their per
ipheral par
ts
.
Is gate GND nor
mal?
(SC4501)
Chec
k SC4501
and its per
ipheral par
ts
.
Is gate cloc
k
(GCK) nor
mal?
(SC4501 7Pin)
Chec
k FL4505,
R4540 and gate arr
a
y per
ipheral
par
ts
. (IC4512
5Pin)
Is VEE-6V being outputted? (SC4501 16~19Pin)
Chec
k lC4508
and its per
ipheral par
ts
.
Is V
GH+34V
being outputted? (SC4501 3/4Pin)
Chec
k lC4507
and its per
ipheral par
ts
.
V
ertical line
output
Is VSH+3.3V being outputted? (SC4901 8/9Pin)
Chec
k IC4703
and its per
ipheral par
ts
.
Ye
s
No
Ye
s
No
Ye
s
No
Ye
s
No
Is source cloc
k
nor
mal?
(SC4901 47Pin)
Chec
k IC4512
and gate ar
a
y
per
ipheral par
ts
.
Ye
s
No
Is output of LBR nor
mal?
(SC4901 10Pin)
Chec
k R4574,
IC4512 and their per
ipheral
par
ts
.
No
No
No
Is GSP w
a
v
ef
or
m
nor
mal?
(SC4501 5/15Pin)
Chec
k FB4512,
FB4515 and their per
ipheral
par
ts
. (IC4512
7/3Pin)
Ye
s
No
No