LG 37LU25 (CHASSIS:LA85D) 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.
CKE
0.1uF 50V
C209
MDATA[0-31]
+2.6V_MVDD
0.1uF
50V
C211
0.1uF
50V
C215
DQS0
0.1uF
50V
C202
+2.6V_MVDD
DQM0
0.1uF
50V
C201
DQM3
0.1uF
50V
C203
0.1uF
50V
C212
DQS2
0.1uF
50V
C214
CKE
0.1uF
50V
C216
0.1uF
50V
C204
0.1uF
50V
C218
+2.6V_MVDD
DQM1
DQS3
0.1uF
50V
C207
+2.6V_MVDD
DQM2
DQS1
0.1uF
50V
C213
0.1uF
50V
C200
0.1uF
50V
C205
MADR[0-12]
MADR[0-12]
300
R215
300
R210
MCLKZ
MCLK
MCLKZ
MCLK
1K
1%
R220
1K
1%
R208
1K
1%
R206
1K
1%
R217
0.1uF
50V
C210
+2.6V_MVDD
+2.6V_MVDD
22
R234
22
R235
22
R233
22
R232
CASZ_DDR
BA0_DDR
RASZ_DDR
WEZ_DDR
BA1_DDR
BA1_DDR
WEZ_DDR
CASZ_DDR
RASZ_DDR
BA0_DDR
CASZ
BA1
BA1_DDR
RASZ_DDR
CASZ_DDR
BA0
WEZ_DDR
RASZ
BA0_DDR
WEZ
3225
22uF
16V
C221
3225
22uF
16V
C220
0.1uF
50V
C206
0.1uF
50V
C217
56
R223
56
R200
56
R201
56
R204
56
R205
56
R212
56
R211
22
AR201
22
AR206
22
AR203
22
AR208
22
AR204
22
AR205
22
AR207
22
AR200
22
R203
22
R214
56
R207
56
R216
56
R202
56
R213
22
R209
22
R221
HY5DU561622FTP-4-C
IC200
26
BA0
27
BA1
28
A10/AP
29
A0
30
A1
31
A2
32
A3
33
VDD_3
34
VSS_1
35
A4
36
A5
37
A6
38
A7
39
A8
40
A9
41
A11
42
A12
43
NC_4
44
CKE
45
CLK
46
/CLK
47
UDM
48
VSS_2
49
VREF
50
NC_5
17
NC_2
3
VDDQ_1
6
VSSQ_1
16
LDQS
15
VDDQ_3
14
NC_1
13
DQ7
12
VSSQ_2
11
DQ6
10
DQ5
9
VDDQ_2
8
DQ4
7
DQ3
4
DQ1
5
DQ2
25
NC_3
24
/CS
23
/RAS
2
DQ0
22
/CAS
21
/WE
1
VDD_1
20
LDM
19
NC
18
VDD_2
51
UDQS
52
VSSQ_3
53
NC_6
54
DQ8
55
VDDQ_4
56
DQ9
57
DQ10
58
VSSQ_4
59
DQ11
60
DQ12
61
VDDQ_5
62
DQ13
63
DQ14
64
VSSQ_5
65
DQ15
66
VSS_3
HY5DU561622FTP-4-C
IC201
26
BA0
27
BA1
28
A10/AP
29
A0
30
A1
31
A2
32
A3
33
VDD_3
34
VSS_1
35
A4
36
A5
37
A6
38
A7
39
A8
40
A9
41
A11
42
A12
43
NC_4
44
CKE
45
CLK
46
/CLK
47
UDM
48
VSS_2
49
VREF
50
NC_5
17
NC_2
3
VDDQ_1
6
VSSQ_1
16
LDQS
15
VDDQ_3
14
NC_1
13
DQ7
12
VSSQ_2
11
DQ6
10
DQ5
9
VDDQ_2
8
DQ4
7
DQ3
4
DQ1
5
DQ2
25
NC_3
24
/CS
23
/RAS
2
DQ0
22
/CAS
21
/WE
1
VDD_1
20
LDM
19
NC
18
VDD_2
51
UDQS
52
VSSQ_3
53
NC_6
54
DQ8
55
VDDQ_4
56
DQ9
57
DQ10
58
VSSQ_4
59
DQ11
60
DQ12
61
VDDQ_5
62
DQ13
63
DQ14
64
VSSQ_5
65
DQ15
66
VSS_3
MADR[2]
MADR[5]
MADR[10]
MDATA[13]
MDATA[1]
MDATA[21]
MADR[1]
MDATA[16]
MDATA[0]
MDATA[20]
MDATA[19]
MDATA[3]
MDATA[9]
MDATA[18]
MADR[3]
MDATA[0-31]
MDATA[0-31]
MADR[11]
MDATA[2]
MDATA[10]
MDATA[12]
MDATA[8]
MDATA[5]
MADR[8]
MDATA[17]
MDATA[4]
MADR[0]
MADR[9]
MADR[7]
MDATA[11]
MDATA[28]
MDATA[29]
MDATA[24]
MDATA[25]
MDATA[26]
MDATA[27]
MADR[12]
MADR[6]
MADR[4]
MADR[3]
MADR[1]
MADR[2]
MADR[0]
MADR[10]
MADR[11]
MADR[9]
MADR[12]
MADR[5]
MADR[7]
MADR[8]
MADR[6]
MADR[4]
MDATA[7]
MDATA[6]
MDATA[15]
MDATA[14]
MDATA[23]
MDATA[22]
MDATA[31]
MDATA[30]
DDR
1 mil = 0.0254 mm
20 mil = 0.508 mm
40 mil = 1.016 mm
ADDRESS TOTAL LENGTH < 3000 mil (76.2mm)
DDR1 & DDR2 different length range = +/- 25 mil (max +/- 50 mil)
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.
1000pF 50V
C303
100pF
50V
C307
+3.3V_IR
KST3906-MTF
Q300
E
B
C
4.7K
R345
READY
R333
LED_AM
003:T6
4.7K
R344
LED_GR1
001:V13
LED_AM
4.7K
R348
LED_AM1
001:V13
4.7K
R349
+3.3V_IR
KST3906-MTF
Q301
E
B
C
IR
006:G11
LED_GR
003:T4
LED_GR
+3.3V_IR
1000pF
50V
C309
1000pF
50V
C301
0.1uF
C300
PANEL_POWER
220uF
16V
C302
1/10W
2K
R314
1/10W
2K
R315
1000pF 50V
C311
LED_PWM
MBW3216-501TF
L308
0
R341
0.1uF
50V
C310
+5V_ST
1000pF
50V
C313
100
R340
KEY_CTL_0
001:Q4
0.1uF
50V
C312
100
R339
KEY_CTL_1
001:Q4
0.1uF
50V
C314
READY
R342
READY
R343
EYEQ_SCL
EYEQ_SDA
EYEQ_SCL
EYEQ_SDA
MSCL
MSDA
READY
R347
READY
R346
GND
0
READY
R318
+3.3V_MULTI
GND
+3.3V_MULTI
GND
SMW200-26C
WXGA
P301
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
26
GND
+3.3V_MULTI
0
R310
0
R330
0
R311
0
R329
0
R321
0
R309
0
R300
0
R307
0
R324
0
R325
0
R326
0
R308
0
R302
0
R306
0
R331
0
R301
0
R320
0
R303
0
R323
0
R305
0
R328
0
R322
0
R304
0
R327
+3.3V_IR
3.3K
R338
R338
3.3K
R336
R336
GND
SMW200-40C
P300
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
12505WS-08A00
IR_08P_only_26INCH
P306
1
2
3
4
5
6
7
8
9
12505WS-15A00
P304
S_Common_except_26INCH
1
SCL_EYEQ
2
SDA_EYEQ
3
GND
4
GND
5
KEY1
6
KEY2
7
3.3V_SW
8
5V_ST
9
PWM_LED
10
IR
11
EYEQ_RESET
12
GND
13
LED_G
14
LED_R/PWM
16
GND
15
GND
0.1uF
50V
READY
C305
0.1uF
50V
READY
C304
0.1uF 50V
READY C306
0.1uF 50V
READY C308
0
R334
S_Common_Except_32HD(Sharp)
4.7K
R337
S_Only_37LPL(FHD)
4.7K
MODULE SELECTION HIGH_4.7k
R312
300
R312-*1
R312-*1
MODULE SELECTION HIGH_300
1K
Mo
du
le
S
el
ec
ti
on
L
ow
R313
22
R319
22
R317
22
READY
R316
4.7K
S_32CMO_Only_Select
R332
BG2012B080TF
L301
BG2012B080TF
L302
BG2012B080TF
L303
BG2012B080TF
L309
BG2012B080TF
L310
LVDS_TXA3-
LVDS_TXA1-
LVDS_TXA2+
LVDS_TXA1+
LVDS_TXA0-
LVDS_TXA2-
LVDS_TXA0+
LVDS_TXA4+
LVDS_TXA4-
LVDS_TXA3+
LVDS_TXA0-
LVDS_TXA1-
LVDS_TXA1+
LVDS_TXA0+
LVDS_TXA2-
LVDS_TXA2+
LVDS_TXA3+
LVDS_TXA3-
LVDS_TXAC-
LVDS_TXAC+
LVDS_TXA4-
LVDS_TXA4+
LVDS_TXB0-
LVDS_TXB1-
LVDS_TXB0+
LVDS_TXB2-
LVDS_TXB1+
LVDS_TXBC-
LVDS_TXB2+
LVDS_TXB3-
LVDS_TXB3+
LVDS_TXB4-
LVDS_TXB4+
LVDS_TXBC+
LVDS_TXAC+
LVDS_TXAC-
LVDS_TXBC-
LVDS_TXB3-
LVDS_TXB4-
LVDS_TXB4+
LVDS_TXB3+
LVDS_TXBC+
LVDS_TXB2+
LVDS_TXB1+
LVDS_TXB0+
TXB1+[8]
TXB0-[11]
TXB2-[7]
TXBC+[4]
TXB4+[0]
TXB3+[2]
TXB0+[10]
TXB3-[3]
TXB4-[1]
TXBC-[5]
TXB2+[6]
TXB1-[9]
TXA0+[10]
TXA4+[0]
TXA0-[11]
TXAC+[4]
TXA1-[9]
TXA1+[8]
TXA4-[1]
TXA2-[7]
TXA3+[2]
TXA3-[3]
TXAC-[5]
TXA2+[6]
LVDS_TXB0-
LVDS_TXB2-
LVDS_TXB1-
IR & LED & Control
WGXA
FHD
LED G
LED R
Key1
GND
Key2
ST_5V
GND
IR
LVDS data format sel
HD: PIN9 / FHD: PIN7
Low: VESA
High: JEIDA
High(300)
26"AUO(HD)
32"CMO(HD)
42"AUO(HD)
High(4.7K)
32"Sharp(HD)
37"42"LPL(HD)
37"LPL(FHD)
42"AUO(FHD)
47"CMO(FHD)
52"Sharp(FHD)
100
R440
SIFM0
001:C9
2.2K
R400
IF_P
0.1uF
50V
C408
+3.3V_AVDD
12K
READY
R412
OPT
R406
C439
READY
100
R437
VROA
+3.3V_PVSB
1000pF
50V
C404
0
R415
SCL_TU
TS[0-7]
10
0
R434
C440
READY
100
R410
READY
+5V_TUNER
MSCL
1K
R428
IF_N
33uF
1
0
V
READY
C407
0.1uF
C418
47K
R446
IF_AGC
MSDA
470
READY
R416
1K
R427
470
R431
PV
100
READY
R417
10K
R403
+3.3V_DVDD
+3.3V_PVSB
VSB_RESET
TS_SYNC
510
R419
R E
A D
Y
0.1uF
C425
R430
R E
A D
Y
SDA_TU
IF_N
+3.3V_AVDD
1K
R426
TS_VALID
1uF 25V
C441
100
R409
READY
TS_CLK
VRMA
VRPA
0.01uF
50V
C409
0.01uF
C419
SDA_TU
V R
P A
100
READY
R438
100
R436
510
R420
R E
A D
Y
VROA
0
R401
10K
READY
R413
4.7K
R405
1/10W
12K
5 %
R402
100 RE
A D
YR435
+3.3V_AVDD
0.1uF 50V
C411
47
R411
+5V_TU
+3.3V_DVDD
4.7K
R407
100
R425
READY
LGDT3304
IC400
1
VR0A
2
VRMA
3
VINA2
4
VINA1
5
INCAP
6
VSSAAD10A
7
I2CSEL
8
VSS_1
9
ANTCON
10
VDD_1
11
I2CRPT_SCL
12
VDD33_1
13
I2CRPT_SDA
14
VSS33_1
15
IFOUT
16
RFOUT
17
TPERR
18
VDD33_2
19
TPVALID
20
TPDATA[0]
21
VSS33_2
22
TPDATA[1]
23
VSS_2
24
TPDATA[2]
25
VDD_2
26
TPDATA[3]
27
TPDATA[4]
28
TPDATA[5]
29
TPDATA[6]
30
VDD33_3
31
TPDATA[7]
32
VSS33_3
33
TPCLK
34
TPSOP
35
NIRQ
36
SDA
37
VDD33_4
38
SCL
39
VSS_3
40
TDO
41
VDD_3
42
TRST
43
VSS33_4
44
TCK
45
TDI
46
PLLAVDD
47
PLLAVSS
48
TMS
49
N R
S T
50
O PM
51
VDD33_5
52
SLIM_SCAN
53
VSS33_5
54
XTALI
55
X T
A L
O
56
VSS_4
57
X M
58
VDD_4
59
VSSDAD10
60
V C
C D
A D
1 0
61
V C
C A
A D
1 0A
62
T A
V D
D
63
TAVSS
64
V R
P A
0
R422
0.1uF
50V
C401
0.01uF
50V
C400
READY
R414
SCL_TU
+1.2V_PVSB
IF_P
IF_AGC
LD400
PV
TUNER_CVBS
001:C10
25MHz
X400
+1.2V_DVDD
1M
R433
5.1K
R423
SIF
001:C9
+3.3V_DVDD
READY
R432
+5V_TU
100
R442
0.01uF
C420
33uF
10V
C402
+5V_TU
+3.3V_AVDD
+5V_TU
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.
+1.2V_DVDD
VRMA
470
R408
0
R421
510
R418
R E
A D
Y
100
R441
0.047uF
C422
1N4148W D401
3216
10uF
16V
C426
3216
10uF
16V
C431
3216
10uF
16V
C413
0.1uF
C424
2.2uF
16V
C410
2.2uF 16V
C421
2.2uF
16V
C423
27pF
C433
27pF
C435
MSDA
MSCL
0
5%
1/4W
R429
10K
R404
0
R449
0.47uH
L407
10%
1uF
10V
C415
1uF
10V
C417
1uF
10V
C414
1uF
10V
C416
1uF
10V
C430
1uF
10V
C427
1uF
10V
C429
1uF
10V
C428
1uF
10V
C437
1uF
10V
C434
1uF
10V
C432
1uF
10V
C436
1uF
10V
C438
47
R424
READY
0.1uF
50V
C442
0.1uF
50V
C443
0.047uF 50V
C412
VCOM0
001:C10
100
R1129
TDVF-H051F
TU401
14
SIF
13
AUDIO_OUT
5
NC_2
12
IF_AGC
11
DIGITAL_IF2
2
RF_AGC
10
DIGITAL_IF1
4
VTU
1
NC_1
9
AS
8
SCL
3
+B[5V]
16
VIDEO_OUT
7
SDA
6
GND
15
IF_AS
17
SHIELD
2SA1530A-T112-1R
Q400
E
B
C
2SC3052
READY
Q401
E
B
C
500-ohm
L400
500-ohm
L401
500-ohm
L405
500-ohm
L406
CM2012F6R8KT
L402
CM2012F6R8KT
READY
L403
CM3216F100KE
L903
R E
A D
Y
82pF
50V
C1715
READY
TP1107
TP1256
220
R447
220
R448
220pF 50V
C403
220pF
50V
C405
220
R444
220
R445
22pF
C406
TS[7]
TS[5]
TS[3]
TS[1]
TS[6]
TS[2]
TS
[0
-7
]
TS[4]
TS[0]
Analog input
TUNER B+ BLOCK
VSB +1.0V B+ BLOCK
VSB +3.3V B+ BLOCK
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