LG 28LB45 series, Service Manual

Page: 20 / 32

THERMAL
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
POWER
2013/09/13
1 12
MT45
R425
0
R423
10K
1%
HD(12V Panel)
R409
10K
HD(12V Panel)
R419
33K
R445
10K
1%
R402
47K
OPT
R436
4.7K
R422
100K
1%
HD(12V Panel)
R440
22K
R434
100K
R404
47K
OPT
R427
5.1K
1%
R429
10K
1%
R444 10K
1%
R443 1K
1%
R410
2K
OPT
R439
10K
R413
2K
OPT
R438
100
R418
33K
HD(12V Panel)
R403
47K
R412
20K
R426
10K
1%
R428
27K
1%
R424
4.7K
1%
R421
43K
1%
HD(12V Panel)
R411
100K
R437
0
HD(12V Panel)
R446
0
HD(12V Panel)
R420
33K
R405
47K
OPT
R401
10K
R417
2K
OPT
R408
68
R407
68
R406
68
HD(12V Panel)
R415
68
R416
75K
1%
R441
100K
R442
10K
FHD(5V Panel)
R400
10K
R414
10K
R433
10K
R430
39K
1%
R431
15K
1%
R432
10K
1%
R421-*1
39K
1%
(OPT)5V MHL Separate
R423-*1
10K
1%
(OPT)5V MHL Separate
R422-*1
15K
1%
(OPT)5V MHL Separate
R448
0
(OPT)5V MHL Separate
R447
0
FHD(5V Panel)
R435
0
FHD(5V Panel)
R3471
1K
FHD
R3472
0
FHD
C414
0.1uF
50V
C406
0.1uF
50V
HD(12V Panel)
C417
0.1uF
16V
HD(12V Panel)
C422
10uF
16V
HD(12V Panel)
C401
10uF
25V
OPT
C408
0.1uF
50V
C412
0.1uF
50V
HD(12V Panel)
C407
0.1uF
50V
C413
0.1uF
50V
C402
10uF
25V
OPT
C426
10uF
10V
OPT
C423
22uF
6.3V C429
0.1uF
16V
C438
0.1uF
16V
C435
0.01uF
25V
C434
1uF
10V
OPT
C419
0.1uF
16V
C418
0.1uF
16V
C421
22uF
6.3V
C433
10uF
10V
C425
10uF
10V
OPT
C424
10uF
16V
HD(12V Panel)
C430
0.1uF
16V
C437
10uF
10V
OPT
C428
0.1uF
16V
HD(12V Panel)
C427
10uF
10V
C431
10uF
10V
C432
0.1uF
16V
C416
0.1uF
50V
C420
0.1uF
16V
C411
0.1uF
50V
C410
0.47uF
16V
OPT
C440
4.7uF
16V
C436
1uF
16V
HD(12V Panel)
C415
0.1uF
16V
C405
2.2uF
25V
C404
2.2uF
25V
HD(12V Panel)
C403
2.2uF
25V
C409
2.2uF
25V
PANEL_CTL
MULTI_ON
POWER_ON/OFF1
MULTI_ON
LED_AMBER
L401
10uH
L402
10uH
HD(12V Panel)
L403
10uH
IC401
MP2315GJ
3
SW
2
IN
4
GND
1
AAM
5
BST
6
EN/SYNC
7
VCC
8
FB
IC400
MP2315GJ
HD(12V Panel)
3
SW
2
IN
4
GND
1
AAM
5
BST
6
EN/SYNC
7
VCC
8
FB
IC402
MP2315GJ
3
SW
2
IN
4
GND
1
AAM
5
BST
6
EN/SYNC
7
VCC
8
FB
IC403
MP2315GJ
3
SW
2
IN
4
GND
1
AAM
5
BST
6
EN/SYNC
7
VCC
8
FB
+3.3V_ST
+12V_Normal
+3.3V_ST
+12V_Normal
+12V_PANEL_POWER
+1.5V_DDR
+3.3V_Normal
+3.3V_ST
+3.3V_Normal
+19V
+3.3V_Normal
+5V_Normal
+5V_PANEL_POWER
+5V_Normal
+3.3V_ST
+5V_MHL_Separate
Q402
PMV48XP
G
D
S
Q403
AO3407A
G
D
S
+1.15V_VDDC
JP401
JP400
IC404
TJ4220GDP-ADJ
3
VIN3
2
EN2
4
NC4
1
NC_1
5
NC_2
6
VOUT
7
ADJ/SENSE
8
GND
9
[EP]GND
JK400
KJA-DC-1-0032
1
2
4
C400
47uF
25V
105C
Q400
MMBT3904(NXP)
E
B
C
Q401
MMBT3904(NXP)
E
B
C
Q3451
MMBT3904(NXP)
FHD
E
B
C
D400
MMBD6100
A2
C
A1
L400
4.7uH
C439
4.7uF
10V
R442-*1
4.7K
HD(12V Panel)
NEW
PANEL POWER CONTROL
19V to 1.15V (M1 Core)
NEW
6604->6601
11.11.07
3.3V TO 1.5V LDO(DDR Power)
3A
3A
Check the Ripple
3A
NEW
19V TO 5V DCDC CONVERTER
3A
NEW
19V to 12V (For HD Panel)
For Module Power Sequence
R441 : 22k --> 100k
R442 : 1k --> 10k
13.06.28
If this system need 5V Power
and don’t need 12V Power,
Please need 5V_MHL_Separate Power
MT45 EU(T/C),LB45 EU(T/C)
Copyright © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only