DOWNLOAD Sharp LC-12A2E (serv.man2) Service Manual ↓ Size: 277.04 KB | Pages: 13 in PDF or view online for FREE

Model
LC-12A2E (serv.man2)
Pages
13
Size
277.04 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Introduction , Contents and - Page 1-13
File
lc-12a2e-sm2.pdf
Date
PREV: Sharp LC-12A2E Service Manual / Specification

Sharp LC-12A2E (serv.man2) Service Manual ▷ View online

13
LC-12A2E
TROUBLE SHOOTING TABLE
 (Continued)
No sound 
fr
om fr
ont 
speaker
s
Yes
No
Is Pin (53) of 
IC2001 at 
“L
”?
No sound 
fr
om rear 
speaker
s
Chec
k all the settings on the microprocessor’
s adjust process men
u.
No sound
No
 Are outputs at 
Pins (1) and (7) 
of IC903 as 
specified?
Yes
No
Are inputs and 
outputs of 
IC303 as 
specified?
Yes
No
Are inputs at 
Pins (5) and (8) 
as w
ell as 
outputs at Pins 
(2) and (11), all 
of IC301, as 
specified?
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
Chec
k IC901, 
IC903 and their 
per
ipher
al 
par
ts
.
Chec
k IC303 
and its 
per
ipher
al 
par
ts
.
Chec
k the line 
in question, 
IC303 and its 
per
ipher
al 
par
ts
.
Yes
Chec
k the 
speak
ers and 
their per
ipher
al 
par
ts
.
No sound 
fr
om 
headphone
Yes
No
Is Pin (55) of 
IC2001 at 
“L
”?
Chec
k the 
headphone and 
its per
ipher
al 
par
ts
.
Chec
k Q306, 
J3410 and their 
per
ipher
al 
par
ts
.
Yes
No
Is Pin (54) of 
IC2001 at 
“L
”?
No
Are input at Pin 
(5) as w
ell as 
output at Pin 
(2) of IC302, as 
specified?
Yes
Chec
k the 
speak
er and its 
per
ipher
al 
par
ts
.
Chec
k the line 
IC901, IC303 
and their 
per
ipher
al 
par
ts
.
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
No sound 
fr
om output 
line
Yes
No
Is Pin (52) of 
IC2001 at 
“L
”?
No
Are outputs at 
Pins (1) and (7) 
of IC902 as 
specified?
Yes
Chec
k the line 
in question.
Chec
k the 
LMUTE line
.
Chec
k IC902 
and its 
per
ipher
al 
par
ts
.
TV sound 
failure
Yes
No
Is output at Pin 
(46) of SC3401 
as specified?
No
Is input at Pins 
(36), (37) of 
IC901 as 
specified?
Chec
k the 
tuner and its 
per
ipher
al 
par
ts
.
Chec
k IC901, 
Q3204, Q3205 
and their 
per
ipher
al 
par
ts
.
13
LC-12A2E
TROUBLE SHOOTING TABLE
 (Continued)
No sound 
fr
om fr
ont 
speaker
s
Yes
No
Is Pin (53) of 
IC2001 at 
“L
”?
No sound 
fr
om rear 
speaker
s
Chec
k all the settings on the microprocessor’
s adjust process men
u.
No sound
No
 Are outputs at 
Pins (1) and (7) 
of IC903 as 
specified?
Yes
No
Are inputs and 
outputs of 
IC303 as 
specified?
Yes
No
Are inputs at 
Pins (5) and (8) 
as w
ell as 
outputs at Pins 
(2) and (11), all 
of IC301, as 
specified?
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
Chec
k IC901, 
IC903 and their 
per
ipher
al 
par
ts
.
Chec
k IC303 
and its 
per
ipher
al 
par
ts
.
Chec
k the line 
in question, 
IC303 and its 
per
ipher
al 
par
ts
.
Yes
Chec
k the 
speak
ers and 
their per
ipher
al 
par
ts
.
No sound 
fr
om 
headphone
Yes
No
Is Pin (55) of 
IC2001 at 
“L
”?
Chec
k the 
headphone and 
its per
ipher
al 
par
ts
.
Chec
k Q306, 
J3410 and their 
per
ipher
al 
par
ts
.
Yes
No
Is Pin (54) of 
IC2001 at 
“L
”?
No
Are input at Pin 
(5) as w
ell as 
output at Pin 
(2) of IC302, as 
specified?
Yes
Chec
k the 
speak
er and its 
per
ipher
al 
par
ts
.
Chec
k the line 
IC901, IC303 
and their 
per
ipher
al 
par
ts
.
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
No sound 
fr
om output 
line
Yes
No
Is Pin (52) of 
IC2001 at 
“L
”?
No
Are outputs at 
Pins (1) and (7) 
of IC902 as 
specified?
Yes
Chec
k the line 
in question.
Chec
k the 
LMUTE line
.
Chec
k IC902 
and its 
per
ipher
al 
par
ts
.
TV sound 
failure
Yes
No
Is output at Pin 
(46) of SC3401 
as specified?
No
Is input at Pins 
(36), (37) of 
IC901 as 
specified?
Chec
k the 
tuner and its 
per
ipher
al 
par
ts
.
Chec
k IC901, 
Q3204, Q3205 
and their 
per
ipher
al 
par
ts
.
13
LC-12A2E
TROUBLE SHOOTING TABLE
 (Continued)
No sound 
fr
om fr
ont 
speaker
s
Yes
No
Is Pin (53) of 
IC2001 at 
“L
”?
No sound 
fr
om rear 
speaker
s
Chec
k all the settings on the microprocessor’
s adjust process men
u.
No sound
No
 Are outputs at 
Pins (1) and (7) 
of IC903 as 
specified?
Yes
No
Are inputs and 
outputs of 
IC303 as 
specified?
Yes
No
Are inputs at 
Pins (5) and (8) 
as w
ell as 
outputs at Pins 
(2) and (11), all 
of IC301, as 
specified?
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
Chec
k IC901, 
IC903 and their 
per
ipher
al 
par
ts
.
Chec
k IC303 
and its 
per
ipher
al 
par
ts
.
Chec
k the line 
in question, 
IC303 and its 
per
ipher
al 
par
ts
.
Yes
Chec
k the 
speak
ers and 
their per
ipher
al 
par
ts
.
No sound 
fr
om 
headphone
Yes
No
Is Pin (55) of 
IC2001 at 
“L
”?
Chec
k the 
headphone and 
its per
ipher
al 
par
ts
.
Chec
k Q306, 
J3410 and their 
per
ipher
al 
par
ts
.
Yes
No
Is Pin (54) of 
IC2001 at 
“L
”?
No
Are input at Pin 
(5) as w
ell as 
output at Pin 
(2) of IC302, as 
specified?
Yes
Chec
k the 
speak
er and its 
per
ipher
al 
par
ts
.
Chec
k the line 
IC901, IC303 
and their 
per
ipher
al 
par
ts
.
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
No sound 
fr
om output 
line
Yes
No
Is Pin (52) of 
IC2001 at 
“L
”?
No
Are outputs at 
Pins (1) and (7) 
of IC902 as 
specified?
Yes
Chec
k the line 
in question.
Chec
k the 
LMUTE line
.
Chec
k IC902 
and its 
per
ipher
al 
par
ts
.
TV sound 
failure
Yes
No
Is output at Pin 
(46) of SC3401 
as specified?
No
Is input at Pins 
(36), (37) of 
IC901 as 
specified?
Chec
k the 
tuner and its 
per
ipher
al 
par
ts
.
Chec
k IC901, 
Q3204, Q3205 
and their 
per
ipher
al 
par
ts
.
13
LC-12A2E
TROUBLE SHOOTING TABLE
 (Continued)
No sound 
fr
om fr
ont 
speaker
s
Yes
No
Is Pin (53) of 
IC2001 at 
“L
”?
No sound 
fr
om rear 
speaker
s
Chec
k all the settings on the microprocessor’
s adjust process men
u.
No sound
No
 Are outputs at 
Pins (1) and (7) 
of IC903 as 
specified?
Yes
No
Are inputs and 
outputs of 
IC303 as 
specified?
Yes
No
Are inputs at 
Pins (5) and (8) 
as w
ell as 
outputs at Pins 
(2) and (11), all 
of IC301, as 
specified?
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
Chec
k IC901, 
IC903 and their 
per
ipher
al 
par
ts
.
Chec
k IC303 
and its 
per
ipher
al 
par
ts
.
Chec
k the line 
in question, 
IC303 and its 
per
ipher
al 
par
ts
.
Yes
Chec
k the 
speak
ers and 
their per
ipher
al 
par
ts
.
No sound 
fr
om 
headphone
Yes
No
Is Pin (55) of 
IC2001 at 
“L
”?
Chec
k the 
headphone and 
its per
ipher
al 
par
ts
.
Chec
k Q306, 
J3410 and their 
per
ipher
al 
par
ts
.
Yes
No
Is Pin (54) of 
IC2001 at 
“L
”?
No
Are input at Pin 
(5) as w
ell as 
output at Pin 
(2) of IC302, as 
specified?
Yes
Chec
k the 
speak
er and its 
per
ipher
al 
par
ts
.
Chec
k the line 
IC901, IC303 
and their 
per
ipher
al 
par
ts
.
Muting eff
ect is 
on.
 Chec
k the 
FSMU line
.
No sound 
fr
om output 
line
Yes
No
Is Pin (52) of 
IC2001 at 
“L
”?
No
Are outputs at 
Pins (1) and (7) 
of IC902 as 
specified?
Yes
Chec
k the line 
in question.
Chec
k the 
LMUTE line
.
Chec
k IC902 
and its 
per
ipher
al 
par
ts
.
TV sound 
failure
Yes
No
Is output at Pin 
(46) of SC3401 
as specified?
No
Is input at Pins 
(36), (37) of 
IC901 as 
specified?
Chec
k the 
tuner and its 
per
ipher
al 
par
ts
.
Chec
k IC901, 
Q3204, Q3205 
and their 
per
ipher
al 
par
ts
.
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