Read Sharp LC-22AD1E (serv.man6) Service Manual online
20
LC-22AD1E
No sound
No sound
fr
om
speakers
No sound
fr
om
headphone
No sound
fr
om exter
nal
speaker
Chec
k all the microprocessor's adjust process men
u.
Is pin (60) of
IC3501 at
"H"?
Chec
k
IC3501 and
its
per
ipher
al
par
ts
.
Is pin (43) of
IC3501 at
"L"?
Chec
k Q3508,
P101, P3501
har
ness and
their
per
ipher
al
par
ts
.
Is pin (70) of
IC3501 at
"H"?
No sound
fr
om SCAR
T1
output line
No sound
fr
om SCAR
T2
output line.
Is output at
pins (36) and
(37) of IC3202
nor
mal?
Is output at
pins (33) and
(34) of IC3202
nor
mal?
Ye
s
No
Are input and
output of
IC3202 as
specified?
Chec
k
IC3202,
IC3403,
IC3402,
IC3405 and
their
per
ipher
al
par
ts
.
Ye
s
No
Are output at
pins (1) and
(7) of IC3408
as specified?
Chec
k
IC3408 and
its
per
ipher
al
par
ts
.
Ye
s
No
Are output
betw
een pins
(2) and (3)
and betw
een
pins (6) and
(7) of P3402
as specified?
Chec
k 1-Bit
amp and
their
per
ipher
al
par
ts
.
Ye
s
No
Is pin (48) of
IC3501 at
"H"?
Chec
k
Q3401,
R
Y3401
and their
per
ipher
al
par
ts
.
Ye
s
No
Chec
k
speak
ers and
their
per
ipher
al
par
ts
.
Ye
s
Ye
s
Ye
s
No
Is pin (58) of
IC3501 at
"L"?
Chec
k
D3204,
Q3202 and
their
per
ipher
al
par
ts
.
Ye
s
No
Ye
s
Ye
s
Ye
s
Are input and
output of
IC3203 as
spedfied?
Chec
k
IC3202,
IC3203 and
their
per
ipher
al
par
ts
.
Ye
s
No
Chec
k the
headphone
and its
per
ipher
al
par
ts
.
No
Chec
k Q3407,
R
Y3403 and
their
per
ipher
al
par
ts
.
Chec
k
SCAR
T1
per
ipher
y
par
ts
.
Chec
k
SCAR
T2
per
ipher
y
par
ts
.
No sound
fr
om PHOTO
Audio out.
Is output at
pin (32) of
IC2510
nor
mal?
Chec
k the
"I2S-D
A-
OUT" line
.
Ye
s
No
Ye
s
Chec
k
IC1101 and
its per
ipher
al
par
ts
.
Chec
k the
"TB
USu"
line and
their
per
ipher
al
par
ts
.
Is a speak
er
setup of
"Speak
er"
set as
"Exter
nal" ?
TROUBLE SHOOTING TABLE (Continued)
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