LG 22LN4060 (CHASSIS:LM91P) Service Manual ▷ View online
- 17 -
8. Abnormal sound (AV)-Main PCBA
Put into AV cable completely?
Abnormal sound (AV)
YES
NO
Insult AV cable tight
1
Change IC501
WAVEFORMS
Is waveform at C520,C521
2
Check Line between JK101 and IC501
is open or short, Another is
change AV cable
NO
YES
C520,C521(audio in)
2
- 18 -
Adaptor
Sound
AMP
NTP7513
(
(
(
(
Module
Audi
o
Ou
t
MST6841XP
5
9
4
3
10
11
Tuner SDA
Tuner SCL
TUNE
R
IF_AGC
B+
IR/KEY
40
24Mh
z
98
99
44
43
IC502
Serial Flash
8Mbyte
s
IC503
EEPROM 24C64
30
LPF
33
18
21
OP
-AMP
x4 Gain
Audio L-
Out
XX
X
39
37
38
Audio R-
Out
HDMI
SCL/SD
A
48
11
5
50
51
11
3
11
2
Audio_SCL
Audio_SDA
LV
DS
Output
P Di
m
Inv.
ON
P_S
T
3.5V
M_3.3V
TU_3.3V
12~19V
Main_1.2V
+18V
10
11
7
8
9
38
I2S_MCLK I2S_WS I2S_SCK I2S_SDO
108
11
1
11
7
IR
KEY1
Led_PWR
102
105
53
52
45
85
84
EEP
SD
A
EEP
SC
L
94
95
97
96
SPI_CLK SPI_D
I
SPI_C
Z
SPI_D
O
S_AMP_19V
32
40
LPF
USB_5V
11
0
KEY2
ST_3.5
V
P_12V
Q710
Main_1.8V
M_3.3V
Q720
AO3407A
Panel_Vcc
Main_5V
To
US
B
USB_DN
USB_DP
IF_P
IF_N
31
35
1.8V RE
G
7
TU_1.8V
19
20
Audio out
27,35,36
22,20,24,
77
62
54
41
30
18
9
11
6
107
100
101
Led_PWR
DT1641S
TPS40210
Modul
e
BLU
22”/26”
LED_28V
BLU_24V
Modul
e
BLU 24”
MP20051
1.8V RE
G
MP1472
MP1584
MP1472
+18V
Q712
To
OP_AMP
CVBS In
AV audio in
BLOCK DIAGRAM
- 19 -
A2
A31
900
200
400
540
910
120
122
300
510
502
51
1
501
800
801
LV
1
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.
INPUT1
JP111
PANEL_VCC
C110
0.1uF
16V
0.1uF
16V
P101
10031HR-30
21.6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
JP129
JP122
JP130
C123
100pF
50V
READY
R120
3.3K
3.3K
JP120
IR
KEY2
KEY1
JP121
R123
100
100
C122
100pF
50V
READY
JP123
R130
100
100
Q121
MMBT3904(NXP)
E
B
C
P120
12507WR-12L
1
2
3
4
5
6
7
8
9
10
11
12
13
Q120
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
C120
0.1uF
16V
0.1uF
16V
EEP_SCL
JP127
R121
3.3K
JP131
C121
0.1uF
16V
0.1uF
16V
JP125
LED_AMBER
JP124
JP128
LED_B
R122
100
100
JP126
EEP_SDA
L120
BLM18PG121SN1D
+3.3V_M
JP112
P102
10031HR-30
18.5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
C112
10uF
16V
10uF
16V
READY
+3.5V_ST
+3.5V_ST
+3.5V_ST
+3.5V_ST
R110
10K
10K
READY
R111
10K
R126
10K
10K
R127
10K
10K
READY
R129
10K
R128
10K
READY
C124
1000pF
50V
RXA3+
RXA2+
RXA1-
RXA3-
RXA0+
RXA2-
RXA1+
RXACK+
RXACK-
RXA0-
RXA1-
RXA3-
RXA2-
RXA0-
RXA3+
RXA0+
RXACK-
RXA1+
RXA2+
RXACK+
VLCD
VLCD
L110
UBW2012-121F
R108
1K
MUTE_AOUT
R101
75
75
R102
220K
220K
JP103
JP104
MNT_LOUT
R104
12K
AUDIO_LIN
Q103
MMBT3904(NXP)
E
B
C
JK101
PPJ234-03
5A
[RD1]O-SPRING
6A
[RD1]E-LUG
4A
[RD1]CONTACT
7B
[WH1]E-LUG-S
5B
[WH1]O-SPRING
7C
[RD2]E-LUG-S
5C
[RD2]O-SPRING
4C
[RD2]CONTACT
5D
[WH2]O-SPRING
4E
[YL]CONTACT
5E
[YL]O-SPRING
6E
[YL]E-LUG
R105
220K
220K
R106
10K
AUDIO_RIN
JP105
MUTE_AOUT
C104
10uF
16V
JP102
R103
10K
R107
12K
12K
JP101
C106
10uF
16V
Q101
MMBT3904(NXP)
E
B
C
CVBS_VIN
R112
3.9K
MNT_ROUT
C105
5600pF
50V
5600pF
50V
R109
1K
C103
5600pF
50V
5600pF
50V
R113
3.9K
R124
100
100
R125
100
100
D123
20V
D127
20V
D126
20V
D125
READY
20V
D122
READY
20V
D120
20V
D121
20V
D
1
0
3
20V
D
1
0
2
20V
D104
20V
D105
20V
ZD101
5.6B
5.6B
ZD102
5.6B
C126
4.7uF
10V
4.7uF
10V
C125
4.7uF
10V
4.7uF
10V
D124
5.6V
C102
1000pF
50V
1000pF
50V
C101
1000pF
50V
1000pF
50V
1 8
INPUT1/LVDS
CONTROL Key
IR & LED
LVDS
POP NOISE
AV_IN/OUT
POP NOISE
EAX65303201
LN4050
2012/12/18
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