LG 22LH250C (CHASSIS:LD91Z) 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.
LVB_3M
LVB_0M
LVB_1P
LVB_2M
LVB_CKP
LVB_CKM
LVB_4P
LVB_0P
LVB_2P
PANEL_POWER
LVB_1M
LVB_4M
LVB_3P
LVA_CKM
LVA_3P
LVA_0P
LVA_4M
LVA_2M
LVA_0M
LVA_1M
LVA_2P
LVA_1P
LVA_3M
LVA_CKP
LVA_4P
MEMC_RESET
MEMC_SDA
0 0 1 : F 2 0
MEMC_SCL
0 0 1 : F 2 1
3.3K
OPT
R1370
0
LVDS_SEL_GND
R1379
0
BIT_SEL_GND(8bit)
R1371
22
R1366
22
R1365
LVDS_SEL
22
OPT
R1367
0
OPT
R1373
BIT_SEL
220uF
16V
C1303
OPT
LVB_CKP
LVB_CKM
LVB_1M
LVB_0M
LVB_3M
LVB_2M
LVB_0P
LVB_3P
LVB_2P
LVB_1P
LVA_2P
LVA_3P
LVA_2M
LVA_3M
LVA_CKP
LVA_CKM
LVA_1M
LVA_1P
LVA_0M
LVA_0P
+3.3V
OPC_EN
OPC_OUT
008:K14
PWM_DIM
+3.3V
+3.3V
BLM18PG121SN1D
L1300
0 . 1 u F
16V
C1300
OPT
R1313
OPT
R1315
OPT
R1312
OPT
R1314
1000pF
50V
C1301
TF05-51S
P1301
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
FF10001-30
LVDS_HD_19~22
P1300
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
FF10001-30
LVDS_HD_26~42
P1302
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
LVDS_SEL_PULLUP
R1378
510
OPC
OPC
R1372
LVA_CKP
LVB_CKP
LVB_CKM
LVB_0M
LVA_CKM
LVB_1P
LVA_3P
LVB_0P
LVA_0P
LVB_2P
LVA_2M
LVB_1M
LVA_0M
LVA_1M
LVA_2P
LVB_3P
LVA_1P
LVA_3M
LVB_2M
LVB_3M
0
R1612
EXCEPT_22LU50
0
R1613
EXCEPT_22LU50
FF10001-30
LVDS_MNT_HD_19~22
P1306
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
AMOTECH
5.6V
ZD1305
IR
AMOTECH
5.6V
ZD1300
19~22/26LH2
AMOTECH
5.6V
ZD1302
+5V_ST
BLM18PG121SN1D
L1302
19~22/26LH2
BLM18PG121SN1D
L1303
0 . 1 u F
C1307
47K
R1303
2SC3052
Q1300
E
B
C
AMOTECH
5.6V
ZD1304
100
R1305
BLM18PG121SN1D
L1305
100
R1318
0 . 1 u F
16V
C1314
47K
R1304
12507WR-03L
19~22/26LH2
P1303
1
KEY1
2
KEY2
3
GND
4
1000pF
50V
C1312
KEY2
12507WS-08L
P1305
1
KEY1
2
KEY2
3
GND
4
5V_ST
5
GND
6
IR
7
LED_B
8
LED_R
9
.
+5V_ST
BLM18PG121SN1D
L1301
10K
R1302
AMOTECH
5.6V
ZD1301
19~22/26LH2
+3.3V_ST
2SC3052
Q1301
E
B
C
4.7K
R1319
0 . 1 u F
16V
16V
C1308
19~22/26LH2
BLM18PG121SN1D
L1304
19~22/26LH2
BLM18PG121SN1D
L1307
BLM18PG121SN1D
L1306
1000pF
50V
C1315
IR_OUT
AMOTECH
5.6V
ZD1303
100pF
50V
C1309
0 . 1 u F
C1305
WARM_LED_ON/LED_W
47K
R1301
0 . 1 u F
16V
C1306
19~22/26LH2
+5V_ST
1000pF
50V
C1313
LED_ON/LED_R
22
R1300
KEY1
4.7K
R1320
AMOTECH
5.6V
ZD1306
100
R1317
4.7K
R1142
IR_OUT_HDMI1
0 0 6 : J 7
IR_OUT
011:AC13
IR_OUT_HDMI2
006:X7
+5V_ST
0 . 1 u F
C1137
22
R1130
IR_OUT_RS232C
004:Y18
74AC08SJ
IC1100
3
O0
2
B0
4
A1
1
A0
6
O1
5
B1
7
GND
8
O3
9
B3
10
A3
11
O2
12
B2
13
A2
14
VCC
IROUT_CTRL
0 0 1 : A I 1 5
2SC3052
Q1100
E
B
C
10K
R1119
10K
R1115
+5V_ST
10K
R1116
1 1 1 1
MODULE&CTL
Module
V4 OPTION
OPC_OUTPUT
OPC_EABLE
E x t e r n a l V B R
S m a l l
X
8BIT
R1370
10BIT
X
R1371
0
R1378
HD
O
FHD
R1379
X
O
X
X
IR & LED
CONTROL
Z e n e r D i o d e i s
c l o s e t o w a f e r
IR_OUT
COMMERCIAL_LITE LH250
EAX61353501
2 0 0 9 . 0 6 . 0 9
RGB
COMPONENT
F-SCART
BUF_TS_CLK/ERR/SYN/DATA[0]
DDR2 SDRAM
(1Gb)
IC300
NAND Flash
HYNIX
IC102
USB
Digital amp
(NTP3100L)
IC701
COMP_Y/Pb/Pr
SC1_CVBS_IN
DSUB_ R/G/B
I2S
Tune
r
(T
DFW
-G23
5
D1)
T
U
100
0
LCD Panel
-19/22/26/32/42LH250C ( Only 42inch FHD )
74LV
C541A
Bu
ffer
IC502
CI Slo
t
(P
50
0)
0)
74LCX244
Bu
ffer
IC501
PCM_A[0:7]
FE_VMAIN
PCM_A[0:7]
SDDR_D[0:15]
DDR2 SDRAM
(512Mb)
IC301
TDDR_D[0:15]
SDDR_A[0:12]
Mstar S6
LGE3369A
(DVIX)
(IC100)
MP6211DH
USB Power
IC402
USB Power
FE_TS_DATA[0:7] Æ CI_MDI[0:7]
SC1_R/G/B
DTV/TV_VOUT
SC1_L/R_IN,
FE_AM_AUDIO,COMP_L/R_IN,
PC_L/R_IN
TDDR_A[0:12]
TPA6110A
IC700
Head
Phone
RS-232C
MAX3232CDR
IC403
SPDIF
SPDIF_OUT
DSUB_H/VSYNC
HP_L/ROUT
L/R
CI_TS_DATA[0:7]
PCM_D[0:7] Æ CI_DATA[0:7]
CI_ADDR[0:7]
AUDIO IN
DGB_TX/RX
HPD1/2, HDMI_CEC
TMDS[0:7] ( Data, Clock (+/-))
USB_DM/DP
EEPROM
AT24C512
(IC105)
EEPROM
AT24C512
(HDCP)IC107
I2C
LVDS
Serial Flash
IC104
For Triton
Serial Flash
IC103
For Boot
KIA7027
(IC101)
Voltage Detector
74LX1G14C
(IC108)
Schmitt Trigger
Reset
5V_HDMI_1/2
HDMI 1/2
Block diagram
Main Block
External
Speaker
Volume
Control
RJ45
Audio L/R
Control + / -
Control 0/1/2/3
74LX1G14C
(IC904)
Buzzer
(BU900)
PWM
LED Clock
B/D
PIC16F819
(IC901)
I2C
KEY1/2
LED_G/R & IR
IR & Control
B/D
IR_OUT
(To RS232 / HDMI)
TPA3124
IC702
74AC08
IC1100
Contents of LCD TV Standard Repair Process
No.
Error symptom (High category)
Error symptom (Mid category)
Page
Remarks
1
No video/Normal audio
1
2
No video/No audio
2
3
Video error, video lag/stop
3
4
Color error
4
5
A. Video error
Vertical/Horizontal bar, residual image,
light spot, external device color error
light spot, external device color error
5
6
No power
6
7
B. Power error
Off when on, off while viewing, power auto
on/off
on/off
7
8
No audio/Normal video
8
9
C. Audio error
Wrecked audio/discontinuation/noise
9
10
No response in remote controller, key error,
recording error, memory error
recording error, memory error
10
11
D. Function error
External device recognition error
11
12
E. Noise
Circuit noise, mechanical noise
12
13
F. Exterior error
Exterior defect
13
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
Click on the first or last page to see other 22LH250C (CHASSIS:LD91Z) service manuals if exist.