LC-22AD1E (serv.man6). (6) Trouble shooting table - Sharp TV Service Manual (repair manual)

lc-22ad1e (serv.man6) service manual
Model
LC-22AD1E (serv.man6)
Pages
7
Size
35.74 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / (6) Trouble shooting table
File
lc-22ad1e-sm6.pdf
Date

Read Sharp LC-22AD1E (serv.man6) Service Manual online

15
LC-22AD1E
Ye
s
No
No
No
No
Ye
s
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
No pictur
e, No sound
Fluor
escent lamp failur
e to light up
Chec
k all connection of each unit.
 (Ref
er to o
v
er
all wir
ing diag
ram.)
Chec
k all the settings microprocessor's adjust process men
u.
Do F3701 and F3702 
function?
Remo
v
e
 F3701 and F3702 and 
chec
k the load side
. Is there 
shor
t-circuiting?
Is there shor
t-circuiting of 
T3700 pr
imar
y side per
ipher
y,
 
IC3700, Q3706 and P3703?
Replace F3701 and F3702.
Chec
T3700's secondar
y side 
per
ipher
y.
Are T3700's 
secondar
outputs B31V
, B9V
, B5V and 
B8V nor
mal?
Chec
T3700's pr
imar
y side 
per
ipher
y.
Chec
T3700's pr
imar
y side 
per
ipher
y,
 Q3715 and their 
per
ipher
al par
ts
.
Chec
k T3700's 
secondar
load.
Does F6551, F6552, F6553 
and F6554 function?
Replace F6551, F6552, 
F6553 and F6554.
Is the pin(10) of lC4512 in the 
"H" state?
Chec
k the OFL line 
(Q3700,Q3711), IC4512 and 
their per
ipher
al par
ts
.
Are the Q6564, Q6566, 
Q6568 and Q6570 shor
t-
circuiting?
Chec
k Q6564, Q6566, 
Q6568, Q6570 and their 
per
ipher
al par
ts
.
Is T6551 
~ T6554's 
pr
imar
oscillator w
a
v
e
fo
rm
 nor
mal?
Chec
k Q6551, Q6552, Q6554, 
Q6555, Q6557, Q6558, Q6560, 
Q6561 and connection cab
le
.
Replace the Fluorescent lamp 
with ne
w one and chec
k again.
TROUBLE SHOOTING TABLE
16
LC-22AD1E
No pictur
e
No pictur
e at 
all
No TV
, A
V1, 
A
V2 and A
V3 
output
No TV output
Chec
k all the settings microprocessor's adjust process men
u.
Is in/output of 
IC801 nor
mal?
Chec
k lC801 
and its 
per
ipher
al par
ts
.
Is in/output of 
IC4601 nor
mal?
Chec
k IC4601 
and its 
per
ipher
al par
ts
.
Is in/out of 
IC4512 nor
mal?
Chec
k lC4512 
and its 
per
ipher
al par
ts
.
Chec
k LCD 
panel v
oltages 
and w
a
v
e
fo
rm
.
Is in/output of 
lC2521 nor
mal?
Chec
k IC2521 
and its 
per
ipher
al par
ts
.
Are input at pins 
(71), (72) and 
(73) of lC801 
nor
mal?
Chec
k lC801 
and its 
per
ipher
al par
ts
.
Are v
oltages at 
pins (6), (7) and 
(18) of tuner 
nor
mal?
Chec
k the po
w
er 
line
.
Is output at pin 
(13) of tuner 
nor
mal?
Chec
k tuner and 
its per
ipher
al 
par
ts
.
Is intput at pin 
(23) of IC2521 
nor
mal?
Chec
k the its 
line
.
Chec
k IC2521 
and its 
per
ipher
al par
ts
.
No DTV output
When input source change as 
"TV" and "A
V1" to "A
V3", 
Does the LCD displa
ys 
correct video?
Chec
k the 
Main2 (po
w
er) 
par
t.
Ye
s
No
Ye
s
No
Ye
s
Ye
s
Is DTV men
u displa
y
ed when 
press "DTV MENU" b
utton?
Ye
s
Chec
k the po
w
er 
line
. (P3704 & 
opposite side)
Chec
k cab
le 
inser
tion.
 (SC2500 
& opposite side)
Does "W
eak or missing signal" 
dialogue appears when 
antenna cab
le remo
v
es?
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Exchange DTV 
unit.
 (T
uner par
prob
lem)
Is an
y ser
vice f
ound b
y
 
perf
or
ming "Reinstall all 
ser
vices"?
Ye
s
Chec
k antenna 
signal.
T
ry Softw
are 
do
wnload via PC 
card.
Still no video?
Exchange DTV 
unit.
 (DIgital unit 
prob
lem)
No
No
No
No
No
Ye
s
No
Ye
s
No
No
Ye
s
No
Ye
s
No
TROUBLE SHOOTING TABLE (Continued)
17
LC-22AD1E
No pictur
e
No SCAR
T1 
(A
V1) output
No SCAR
T2 
(A
V2) output
No S-V
ideo 
(A
V3) output
Chec
k all the settings microprocessor's adjust process men
u.
Is output at 
pin (17) of 
IC2521 
nor
mal?
Chec
k the 
IC2521 and 
its 
per
ipher
al 
par
ts
Chec
k the  
IC2522, A
V1 
line (SC1-
OUT
-V) and 
their 
per
ipher
al 
Is input at 
pin(27) of 
IC2521 
nor
mal?
Chec
k the 
A
V1 line 
(SC1-IN-V) 
and their 
per
ipher
al 
par
ts
.
Is output at 
pin (13) of 
IC2521 
nor
mal?
Chec
k the 
IC2521 and 
its 
per
ipher
al 
par
ts
.
Chec
k the  
IC2523, 
(SC2-OUT
-V) 
and their 
per
ipher
al 
par
ts
Is input at 
pins (5) and 
(7) of IC2521 
nor
mal?
Chec
k the 
(SC3-IN-Y) 
line
, (SC3-
IN-C) line 
and their 
per
ipher
al 
par
ts
No line 
output
Is input at pin 
(72) of IC801 
nor
mal?
Chec
k the 
(SY
-OUT) 
line and 
their 
per
ipher
al 
par
ts
.
Ye
s
No
Ye
s
No
Ye
s
Ye
s
No
No
Is input at pin 
(73) of IC801 
nor
mal?
Chec
k the 
V
-P
AL line 
and their 
per
ipher
al 
par
ts
No
No
No 
TELETEXT 
output 
Is input at 
pins (1), (2) 
and (3) of 
IC801 
nor
mal?
Chec
IC801 and 
its 
per
ipher
al 
par
ts
.
Ye
s
Is output at 
pins (3), (5) 
and (6) of 
IC1630 
nor
mal?
Ye
s
Is output at 
pins (57) ~ 
(60) of 
IC1601 
nor
mal?
Chec
k the 
its line
.
No
Ye
s
Is input at pin 
(21) of 
IC1601 
nor
mal?
Chec
IC1601, 
IC1604 and 
their 
per
ipher
al 
par
ts
No
Ye
s
Chec
k the its 
line
(RMD1/TXD1)
No
Is input at 
pin(29) of 
IC2521 
nor
mal?
Chec
k the 
A
V2 line 
(SC2-IN-V) 
and their 
per
ipher
al 
par
ts
.
Ye
s
No
TROUBLE SHOOTING TABLE (Continued)
18
LC-22AD1E
No pictur
Becomes dark
Time passes, 
becomes dark 
Becomes white
Chec
k all the settings microprocessor's adjust process men
u.
Is source GND 
nor
mal? 
(SC4901, 
SC4902)
Chec
k SC4901, 
SC4902 and 
their per
ipher
al 
par
ts
.
Is CSCOM 
wav
e
fo
rm
 
nor
mal? 
(SC4901 1/2 
Pin)
Chec
k IC4706, 
IC4702, Q4701 
and their 
per
ipher
al par
ts
.
Is gate GND 
nor
mal? 
(SC4501)
Chec
k SC4501 
and its 
per
ipher
al par
ts
.
Is gate cloc
(GCK) nor
mal? 
(SC4501 7Pin)
Chec
k FL4505, 
R4540 and gate 
arr
a
y
 per
ipher
al 
par
ts
. (IC4512 
5Pin)
Is VEE-6V 
being 
outputted? 
(SC4501 
16~19Pin)
Chec
k lC4508 
and its 
per
ipher
al par
ts
.
Is V
GH+34V 
being outputted?
(SC4501 3/4Pin)
Chec
k lC4507 
and its 
per
ipher
al par
ts
.
V
ertical line 
output
Is VSH+3.3V 
being 
outputted? 
(SC4901 
8/9Pin)
Chec
k IC4703 
and its 
per
ipher
al par
ts
.
Ye
s
No
Ye
s
No
Ye
s
No
Ye
s
No
Is source cloc
nor
mal? 
(SC4901 47Pin)
Chec
k IC4901 
and gate ar
a
y
 
per
ipher
al par
ts
.
Ye
s
No
Is output of LBR 
nor
mal? 
(SC4901 10Pin)
Chec
k R4574, 
IC4512 and 
their per
ipher
al 
par
ts
.
No
No
No
Is GSP 
wav
e
fo
rm
 
nor
mal? 
(SC4501 
5/15Pin)
Chec
k FB4512, 
FB4515 and 
their per
ipher
al 
par
ts
. (IC4512 
7/3Pin)
Ye
s
No
No
TROUBLE SHOOTING TABLE (Continued)
Page of 7
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Here you can read online and download Sharp LC-22AD1E (serv.man6) Service Manual in PDF. LC-22AD1E (serv.man6) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp LC-22AD1E (serv.man6) LCD. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.