LG 22LT640H (CHASSIS:LD2AY) Service Manual ▷ View online
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.
390pF
50V
C533
10K
R521
33pF
50V
50V
C509
1000pF
50V
C505
1000pF
50V
C516
SPK_L-
SPK_R-
12
R512
0 . 1 u F
50V
50V
C520
4.7K
R517
1uF
25V
25V
C529
10.0uH
L506
0 . 1 u F
50V
50V
C519
0 . 1 u F
50V
50V
C521
10.0uH
L504
0 . 1 u F
50V
C537
12
R514
0 . 1 u F
50V
C539
0 . 1 u F
50V
C502
SPK_R+
AUD_LRCK
10uF
10V
10V
C515
AUD_LRCH
0 . 4 7 u F
50V
C535
SPK_R+
100
R506
10uF
10V
C510
10.0uH
L505
+3.3V_Normal
0 . 1 u F
50V
50V
C522
SPK_L-
10uF
10V
OPT
C511
10uF
35V
C524
0 . 1 u F
16V
16V
C512
0 . 1 u F
16V
16V
C508
10.0uH
L503
+24V_AMP
0 . 1 u F
16V
C514
12
R508
AMP_MUTE
12
R510
390pF
50V
C530
22000pF
50V
50V
C527
10uF
35V
35V
C523
SPK_R-
AUD_SCK
SPK_L+
0 . 1 u F
50V
50V
C540
AMP_RESET
4.7K
R519
1uF
25V
25V
C528
3.3K
R505
0 . 1 u F
50V
C538
AUD_MASTER_CLK
22000pF
50V
C517
10uF
10V
10V
C506
WAFER-ANGLE
P501
1
2
3
4
AMP_SDA
0 . 1 u F
50V
C501
+24V
1N4148W
100V
OPT
D504
1N4148W
100V
OPT
D502
22000pF
50V
C518
BLM18PG121SN1D
L502
390pF
50V
C531
0 . 1 u F
16V
C513
12
R511
AMP_SCL
390pF
50V
C532
0 . 0 1 u F
50V
50V
OPT
C525
12
R509
SPK_L+
100
R503
+24V_AMP
22000pF
50V
C526
+3.5V_ST
1N4148W
100V
OPT
D503
4.7K
R516
+24V_AMP
1uF
25V
25V
C534
33pF
50V
50V
C507
1N4148W
100V
OPT
D501
3 . 3
OPT
R507
10K
R502
100
R504
10K
R501
1000pF
50V
C504
4.7K
R518
12
R513
0 . 4 7 u F
50V
C536
12
R515
100pF
50V
C503
10K
R520
POWER_DET
0
R522
OPT
CIS21J121
L501
MMBT3904(NXP)
Q501
E
B
C
THERMAL
NTP-7500L
IC501
1
AGND_PLL
2
AVDD_PLL
3
DVDD_PLL
4
LF
5
DGND_PLL
6
GND_1
7
DGND
8
DVDD
9
SDATA
10
WCK
11
BCK
12
SDA
13
SCL
14
/FAULT
15
MONITOR0
16
MONITOR1
17
MONITOR2
18
BST2B
19
PGND2B
20
OUT2B_1
21
OUT2B_2
22
PVDD2_1
23
PVDD2_2
24
PVDD2_3
25
OUT2A_1
26
OUT2A_2
27
PGND2A
28
BST2A
29
VDR2
30
AGND
31
VCC_5
32
VDR1
33
BST1B
34
PGND1B
35
OUT1B_1
36
OUT1B_2
37
PVDD1_1
38
PVDD1_2
39
PVDD1_3
40
OUT1A_1
41
OUT1A_2
42
PGND1A
43
BST1A
44
/RESET
45
AD
46
GND_IO
47
CLK_I
48
VDD_IO
49
[EP]
SPEAKER_R
SPEAKER_L
2 0 1 1 . 0 8 . 2 1
2 2 0
EMEA INTERACTIVE
AUDIO AMP
GP4_MSTAR
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.
1000pF
50V
C603
+3.5V_ST
100
R613
+3.5V_ST
LED_R/BUZZ
0 . 1 u F
16V
C602
+3.5V_ST
47K
R623
10K
1%
1%
R622
18pF
50V
50V
OPT
C607
100pF
50V
C606
SENSOR_SCL
0 . 1 u F
C601
+3.5V_ST
0 . 1 u F
C600
47K
R614
OPT
47K
R624
1.5K
R629
100
R627
OPT
SENSOR_SDA
18pF
50V
50V
OPT
C608
0
R615
+3.5V_ST
22
R608
10K
1%
R620
KEY1
47K
R625
OPT
NEC_IR
KEY2
100
R612
100
R626
OPT
10K
R630
OPT
10K
R621
OPT
BLM18PG121SN1D
L600
BLM18PG121SN1D
L601
BLM18PG121SN1D
L602
IR_OUT_CTRL
30K
R601
IR_OUT_RS232C
22
R606
22
R604
+5V_ST
30K
R600
10K
R616
+5V_ST
10K
R619
+5V_ST
10K
R617
IR_OUT_HDMI2
30K
R602
+5V_ST
IR_OUT_SIDE_HDMI
10K
R618
IR_OUT_HDMI1
22
R603
22
R605
12507WR-10L
P601
1
2
3
4
5
6
7
8
9
10
11
200pF
5.6V
D600
200pF
5.6V
D601
5.48VTO5.76V
ZD600
5.48VTO5.76V
ZD601
OPT
5.48VTO5.76V
ZD602
OPT
2SC3052
Q602
E
B
C
2SC3052
Q604
E
B
C
2SC3052
Q603
E
B
C
2SC3052
Q606
E
B
C
2SC3052
Q608
E
B
C
2SC3052
Q601
E
B
C
2SC3052
Q605
E
B
C
2SC3052
Q607
OPT
E
B
C
2SC3052
Q600
E
B
C
10K
R610
10K
R611
10K
R609
10K
R607
IR & LED
CONTROL
2 0 1 1 . 0 8 . 2 1
6 2 0
EMEA INTERACTIVE
IR/CONTROL
GP4_MSTAR
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.
RXA1+
RXA1-
0
OPT
R713
RXA0-
3.3K
OPT
R705
RXB3-
RXA3+
RXB0-
RXACK+
10uF
16V
16V
OPT
C701
RXA0+
FF10001-30
P705
HD
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
3.3K
OPT
R712
RXACK-
PANEL_VCC
RXB1-
RXA0+
RXACK+
0 . 1 u F
16V
16V
C710
FHD
+3.3V_Normal
RXA2-
RXA1-
RXB1+
RXB0+
1000pF
50V
50V
OPT
C702
120-ohm
FHD
L702
0 . 1 u F
16V
16V
HD
C703
RXA4+
10K
OPT
R711
RXA4-
RXB2-
RXA2-
RXB3+
F I - R E 5 1 S - H F - J - R 1 5 0 0
P703
FHD
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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
+3.3V_Normal
RXACK-
RXBCK-
10K
OPT
R710
RXA3-
1000pF
50V
50V
C709
OPT
10uF
16V
16V
OPT
C700
RXA3-
RXB4+
120-ohm
HD
L701
RXBCK+
10K
BIT_SEL_LOW
R709
RXA3+
RXA2+
RXA2+
RXA1+
PANEL_VCC
RXA0-
RXB4-
RXB2+
0
37_LGD
R700
PWM_DIM
3.3K
37_LGD
R701
R701
OPC&SCANNING_CTRL
+3.3V_Normal
10K
OPT
R702
R702
[ 5 1 P i n L V D S C o n n e c t o r ]
( F o r F H D 6 0 / 1 2 0 H z )
[ 3 0 P i n L V D S C o n n e c t o r ]
(For HD 60Hz_Normal)
BIT_SEL: AUO-GND, LGD-NC
LVDS_SEL
LVDS_SEL
2 0 1 1 . 0 8 . 2 1
7 2 0
EMEA INTERACTIVE
LVDS WAFER
GP4_MSTAR
SCANNING_EN
RXA4+
RXA3-
RXB4-
RXA3+
RXACK-
RXA4+
RXB4+
P o l - c h a n g e
RXB2-
RXB4-
RXB3-
RXB4-
RXA1-
RXB2-
RXA0+
RXB0-
RXA0+
RXB2+
RXB4+
RXA3-
RXB0-
RXA2-
RXB2+
RXA4-
RXA2+
RXA0-
RXB3-
RXB4+
RXBCK+
RXBCK+
C h a n g e i n S 7 L R
RXB3+
RXB1-
RXB3+
RXACK+
RXB1-
RXA1+
RXB1+
RXB0-
RXB0+
RXBCK+
RXB1+
RXACK+
MIRROR
RXACK-
RXA0-
RXB2+
RXB3-
RXA3-
RXA3+
RXA1+
RXA2+
RXA0+
RXB1-
RXB2-
RXB3+
RXA1-
FOR FHD REVERSE(10bit)
RXBCK-
RXA1+
RXACK+
RXBCK-
RXB1+
RXA2+
RXA1-
RXA4-
RXB0+
RXACK-
RXA4+
RXB0+
RXA3+
RXA2-
RXA4-
RXA2-
RXBCK-
RXA0-
RXA2-
RXA4-
RXB1+
RXBCK+
RXB4-
RXA3-
RXA0+
RXB2-
RXA0-
RXBCK+
RXACK+
RXA3-
RXBCK+
RXA2+
RXB0+
RXA3+
MIRROR
RXB4-
RXB0+
RXB1+
RXB0-
RXA4+
RXB0+
RXB4-
RXA1-
RXB2+
RXB3+
RXA2-
C h a n g e i n S 7 L R
RXBCK-
RXA1+
RXA1-
RXA1+
RXB2+
RXA2+
RXA2+
RXB3+
RXACK-
RXBCK-
RXB2-
RXA0+
RXA1-
RXA4-
RXB1-
P o l - c h a n g e
RXA2-
RXB0-
RXA0-
RXB1+
RXA4-
RXACK-
RXB4+
RXB0-
RXA4+
RXA4-
RXB1-
RXB0+
RXB4-
RXB2-
RXB4+
RXA0-
RXACK-
RXACK-
RXA3+
RXB3-
RXB3-
RXA2-
RXA4+
RXACK+
RXB1-
RXA1+
RXA0-
S h i f t
RXB3-
RXBCK-
RXB4+
RXACK+
RXBCK-
RXB2+
RXBCK+
RXA3-
RXA1+
RXA2+
RXB4+
RXB1-
RXA3+
RXB0-
RXB3-
RXB1+
RXA3+
RXA3-
FOR FHD REVERSE(8bit)
RXB3+
RXB2-
RXACK+
RXA0+
RXB3+
RXB2+
RXA1-
RXA0+
RXA4+
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.
2.7K
R888
HDMI_1
DDC_SCL_2
5V_DET_HDMI_4
D804
OPT
DDC_SDA_1
10K
R862
D1+_HDMI2
HDMI_CEC
D0-_HDMI1
CK-_HDMI4
68K
R854
OPT
D0+_HDMI2
0
R815
5V_HDMI_1
2.7K
R889
HDMI_2
+5V_Normal
D2-_HDMI2
HPD4
10K
R828
CK+_HDMI1
D0+_HDMI4
1K
R896
0 OPT
R805
2.7K
R884
HDMI_1
1.8K
R803
HPD2
5V_DET_HDMI_2
2.7K
R885
HDMI_2
HDMI_CEC
1.8K
R837
DDC_SCL_4
HDMI_CEC
DDC_SDA_2
DDC_SCL_4
D0+_HDMI1
10K
R808
DDC_SDA_1
1.8K
R804
+5V_Normal
D2+_HDMI4
CK-_HDMI2
10K
R806
D1-_HDMI2
DDC_SCL_1
DDC_SDA_2
CK+_HDMI4
CK+_HDMI2
0 . 1 u F
16V
16V
C805
OPT
2.7K
R887
HDMI_SIDE
5V_DET_HDMI_1
10K
R830
D0-_HDMI2
DDC_SCL_1
5V_HDMI_2
CK-_HDMI1
+5V_Normal
0 . 1 u F
16V
16V
C802
D1-_HDMI1
DDC_SDA_4
AVRL161A1R1NT
OPT
D803
0
R841
1K
R897
68K
OPT
OPT
R857
10K
R807
1K
R895
D1+_HDMI4
3.3K
R835
DDC_SCL_2
0 . 1 u F
16V
16V
C803
5V_HDMI_4
HDMI_ARC
D2-_HDMI4
HDMI_CEC
D2+_HDMI2
5V_HDMI_2
D0-_HDMI4
+3.5V_ST
10K
R856
OPT
D1-_HDMI4
D2+_HDMI1
D2-_HDMI1
3.3K
R802
2.7K
R891
HDMI_SIDE
5V_HDMI_4
DDC_SDA_4
CEC_REMOTE_S7
3.3K
R801
HPD1
0 . 1 u F
16V
16V
C801
5V_HDMI_1
D1+_HDMI1
0
R824
100
R855
+3.5V_ST
10K
R814
D805
CEC_REMOTE_NEC
100
R813
OPT
0 . 1 u F
16V
16V
C804
68K
R816
AVRL161A1R1NT
OPT
D806
68K
R812
IR_OUT_HDMI1
0
R809
0
R810
IR_OUT_HDMI2
0
R811
IR_OUT_SIDE_HDMI
CEC_ON/OFF
BSS83
Q806
OPT
S
B
D
G
BSS83
Q805
S
B
D
G
MMBT3904(NXP)
Q802
E
B
C
MMBT3904(NXP)
Q803
E
B
C
MMBT3904(NXP)
Q801
E
B
C
200pF
5.6V
D802
OPT
200pF
5.6V
OPT
D801
200pF
5.6V
OPT
D811
MMBD6100
D821
D821
HDMI_1
A2
C
A1
MMBD6100
D822
D822
HDMI_2
A2
C
A1
MMBD6100
D824
D824
HDMI_SIDE
A2
C
A1
EAG59023302
JK802
HDMI_1
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
EAG59023302
JK801
HDMI_2
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
EAG62611201
HDMI_SIDE
JK803
14
13
5
D1_GND
20
BODY_SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
HDMI_1
HDMI_2
For CEC
SIDE_HDMI
2 0 1 1 . 0 8 . 2 1
8 2 0
EMEA INTERACTIVE
GP4_MSTAR
HDMI
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