LG 22LS3500 / 22LS3700 (CHASSIS:LB21A) Service Manual ▷ View online
- 21 -
10. AV Audio
11. Component Audio
Check AV Cable for damage
for damage or open conductor
Check JK1602 & Signal Line
R1632, R1633
ok
ok
No
Replace Jack
Follow procedure
‘8. All source audio’
trouble shooting guide.
Check Component Cable
for damage or open conductor.
Check JK1602 & Signal Line
R1632, R1633
ok
ok
No
Replace Jack JK1602
Follow procedure
‘8. All source audio’
trouble shooting guide.
- 22 -
R
G
B
-P
C
(J
K
11
04
)
Tu
ne
r
(T
U
37
04
)
C
om
po
ne
nt
1
&
A
V
C
om
po
ne
nt
2
(J
K
16
01
)
PC
-A
U
D
IO
(J
K
11
02
)
Main SO
C
S7
LR
(L
G
E2
11
1A
)
(IC
10
1)
SIDE
RE
A
R
U
SB
(J
K
14
50
)
HDMI1 (J
K
80
1)
HDMI2 (J
K
80
2)
(P
70
5)
30P
H
D L
VD
S w
afe
r
51P
F
HD
LV
DS
waf
er
(P
70
3)
(P
70
5)
(P
70
3)
TU
_S
C
L
/ S
D
A
IF
_P
/N
_M
ST
A
R
, T
U
_C
VB
S,
T
U
_S
IF
SC1/COMP1_L/R_I
N
C
O
M
P1
_Y
+/
Pb
+/
Pr
+
C
O
M
P2
_L
/R
_I
N
C
O
M
P2
_Y
+/
Pb
+/
Pr
+,
A
V_
C
VB
S_
IN
Et
he
rn
et
(J
K
21
00
)
SP
D
IF
_O
U
T
PC
_L
/R
_I
N
D
SU
B
_R+/G
+/
B
+,
D
SU
B
_H
/V
SY
N
C
C
K
+/
-, D0
+/
-,
D
1+
/-,
D
2+
/-,
D
3+
/-_
H
D
M
I2
C
K
+/
-, D0
+/
-,
D
1+
/-,
D
2+
/-,
D
3+
/-_
H
D
M
I1
D
D
C
_S
CL/SDA
_1
D
D
C
_S
CL/SDA
_2
HDMI3 (J
K
80
3)
C
K
+/
-, D0
+/
-,
D
1+
/-,
D
2+
/-,
D
3+
/-_
H
D
M
I4
D
D
C
_S
CL/SDA
_4
SI
D
E_
U
SB
_D
M
/D
P
U
SB
1_
O
C
D
/C
TL
EP
H
Y_
R
P/
N
, E
PH
Y_
TP
/N
O
C
P
IC
:
AP
21
91
D
SG
(IC
14
50
)
+5
V_
U
SB
1
SP
D
IF
(O
pt
ic
)
(J
K
11
03
)
Sy
st
em
E
EP
R
O
M
(2
56
K
bi
t)
IC104IC104
IC102
N
AN
D
F
LA
SH
(1Gbit
)
IC102
IC
12
01
, I
C
12
02
D
D
R
3
SD
R
AM
(1Gbit
)
IC
12
01
, I
C
12
02
Serial Flas
h
(8
M
bi
t)
IC
14
01
IC
14
01
SP
I_
SC
K
/S
D
I/S
D
O
/C
S
I2
C
_S
C
L/
SD
A
PC
M
_A
[0
-7
],…
A
-M
D
Q
L[
0-
7]
, A
-M
D
Q
U
[0
-7
],…
B
-M
D
Q
L[
0-
7]
, B
-M
D
Q
U
[0
-7
],…
R
XA
0+
/-~
R
XA
4+
/-,
R
XA
C
K
+/
-
RXB0+/-~RXB4
+/
-,
R
XB
C
K
+/
-
SP
K
_R
SP
K
_L
10
P
co
nn
ec
to
r
P2
40
1
10
P
co
nn
ec
to
r
P2
40
1
SE
N
SO
R
_S
C
L/
SD
A
,
K
EY
1/
2,
L
ED
_B
, I
R
A
M
P_
SC
L/
SD
A
A
U
D
_M
A
ST
ER
_C
LK
,
A
U
D
_L
R
C
H
,
A
U
D
_L
R
C
K
, A
U
D
_S
C
K
N
TP
-7
50
0L
(IC
50
1)
Sy
st
em
E
EP
R
O
M
BLOCK DIAGRAM
- 23 -
A2
A21
A5
A31
A10
* Set + Stand
900
200
400
540
521
820
910
120
300
510
310
LV
1
410
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SC1_SOG_IN
CI_TS_DATA[0]
PCM_D[6]
PCM_5V_CTL
/PCM_CE
SC1_FB
CI_TS_CLK
PCM_A[10]
PCM_A[9]
HP_LOUT
CI_TS_DATA[2]
CI_TS_SYNC
PCM_A[13]
SC1_ID
PCM_D[1]
HP_DET
SCART1_MUTE
PCM_D[5]
/PCM_WE
SC1_CVBS_IN
/PCM_IRQA
PCM_D[3]
/CI_CD1
PCM_D[0]
/PCM_CD
CI_TS_DATA[5]
PCM_D[2]
PCM_A[14]
CI_TS_DATA[4]
SCART1_Lout
/PCM_REG
HP_ROUT
/PCM_IOWR
CI_TS_DATA[1]
PCM_RST
/CI_CD2
PCM_A[12]
CI_TS_VAL
CI_TS_DATA[3]
/PCM_WAIT
SCART1_Rout
CI_TS_DATA[6]
PCM_D[4]
PCM_A[8]
DTV/MNT_VOUT
PCM_D[7]
CI_DET
/PCM_OE
SIDE_HP_MUTE
CI_TS_DATA[7]
S2_RESET
/PCM_IORD
PCM_A[11]
2011.07.07
TP_NON_EN
3
GP4_S7LR2
TP for Headphone
TP for S2
TP for CI slot
TP for NON-EU models(except EU and China)
TP for SCART
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