55LS675H (CHASSIS:LA2AG) - LG TV Service Manual (repair manual). Page 24

Read LG 55LS675H (CHASSIS:LA2AG) Service Manual online

THERMAL
THERMAL
THERMAL
THERMAL
THERMAL
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.
R451
10K
IC405
AOZ1051PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SS
8
NC
9
[EP]LX
C417
2200pF
L423-*1
0
1/10W
5%
3.3V_REGISTER
C401
10uF
25V
C419
100pF
50V
OPT
L409
IC404
AOZ1051PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SS
8
NC
9
[EP]LX
+5V_Normal
C400
10uF
25V
L411
3.6uH
NR8040T3R6N
L423
CIC21J501NE
3.3V_BEAD
R438
10K
1%
L400
3.6uH
NR8040T3R6N
C452
100pF
50V
OPT
+3.3V_Normal
L403
C459
0.1uF
16V
C457
0.1uF
16V
C422
22uF
16V
C454
22uF
16V
C415
2200pF
+12V/+15V
C413
0.1uF
16V
R434
12K
+12V/+15V
C402
10uF
25V
C462
22uF
10V
OPT
C410
10uF
25V
R437
10K
L405
R425
9.1K
C421
0.1uF
16V
POWER_ON/OFF1
+3.5V_ST
R459
10K
C449
3300pF
50V
C414
3300pF
50V
P407
12507WR-08L
FOR LPB MODEL
1
2
3
4
5
6
7
8
9
R184
33
FOR LPB MODEL
R183
33
FOR LPB MODEL
I2C_SDA
I2C_SCL
R422
10K
1%
R466
22K
1%
R443
11K
1%
R464
56K
1%
R465
12K
1%
R427
10K
OPT
+3.3V_Normal
R401
10K
L407-*1
MLB-201209-0120P-N2
R462
10K
OPT
C418
0.1uF
50V
R486
4.7K
OPT
0
R408
OPT
L407
CIS21J121
R418
6.8K
OPT
+3.5V_ST
R414
0
OPT
R413
0
OPT
R421
10K
C407
0.1uF
16V
OPT
R400
100
OPT
+3.5V_ST
Q401
MMBT3904(NXP)
E
B
C
C416
0.1uF 16V
OPT
R611
0
+24V
R476
0
OPT
R475
0
OPT
+3.5V_ST
+12V/+15V
C406
0.1uF
16V
+3.5V_ST
R412
0
OPT
R417
0
OPT
R606
3.9K
PWM_PULL-DOWN_3.9K
100
R420
OPT
R606-*1
1K
PWM_PULL-DOWN_1K
RL_ON
R419
1K
INV_CTL
L402
CIS21J121
+3.3V_Normal
PWM_DIM
0 R411
OPT
ERROR_OUT
C408
0.1uF
16V
OPT
R415
100
Q405
MMBT3904(NXP)
E
B
C
100
R409
OPT
R406
4.7K
L402-*1
MLB-201209-0120P-N2
L404
CIS21J121
R426
10K
L404-*1
MLB-201209-0120P-N2
C404
0.1uF
16V
IC401
AOZ1051PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SS
8
NC
9
[EP]LX
R416
56K
1%
C493
3300pF
50V
L401
R609
11K
1%
R423
12K
1%
C405
10uF
25V
C4074
0.1uF
16V
+12V/+15V
C494
2200pF
50V
C420
22uF
16V
C4072
100pF
OPT
C4073
0.1uF
16V
+5V_USB
R608
12K
C492
22uF
16V
OPT
C4075
10uF
25V
R410
10K
L406
3.6uH
IC403
TPS54319TRE
1
VIN_1
3
GND_1
7
COMP
9
SS/TR
10
PH_1
11
PH_2
12
PH_3
13
BOOT
14
PWRGD
15
EN
16
VIN_3
5
AGND
8
RT/CLK
6
VSENSE
4
GND_2
2
VIN_2
17
EP[GND]
C488
3300pF
C447
0.33uF
16V
C439
100pF
50V
C453
22uF
10V
L413
C448
3300pF
50V
L415
3.6uH
NR8040T3R6N
C456
22uF
10V
R436
15K
+1.10V_VDDC
C441
0.1uF
16V
C431
0.1uF
16V
R424
0
C444
0.1uF
16V
R432
330K
1/16W
5%
R445
0
OPT
FB_CORE
+3.5V_ST
R428
10K
+3.3V_Normal
R441
56K
1/16W
1%
C430
10uF
10V
R442
27K
1/16W
1%
+2.5V_Normal
C440
0.1uF
16V
IC402
TJ3940S-2.5V-3L
1
GND
2
VOUT
3
VIN
C403
10uF
10V
C432
0.1uF
16V
R473
1
+3.3V_Normal
R457
4.3K
1/16W
1%
IC407
AP7173-SPG-13 HF(DIODES)
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[EP]
+1.5V_DDR
+3.3V_Normal
10uF
C461
10V
R456
4.7K
1/16W
1%
R446
10K
L420
BLM18PG121SN1D
C476
0.1uF
16V
C472
22uF
10V
+3.5V_ST
R433
10K
560pF
C467
50V
C443
10uF
25V
PANEL_CTL
001:AL22
+3.5V_ST
R405-*2
4.7K
PANEL_DISCHARGE_RES_4.7K
+12V/+15V
R407
2.2K
OPT
Q406
MMBT3904(NXP)
OPT
E
B
C
R430
10K
R405-*1
3K
PANEL_DISCHARGE_RES_3K
C442
10uF
25V
OPT
R429
47K
OPT
PANEL_VCC
R440
5.6K
R435
22K
OPT
Q407
MMBT3904(NXP)
E
B
C
C455
0.1uF
25V
R431
22K
OPT
C438
0.1uF
25V
R407-*2
4.7K
PANEL_DISCHARGE_RES_4.7K
R439
33K
Q409
AO3407A
G
D
S
C409
0.015uF
50V
0.015uF
R489
10K
C451
0.1uF
25V
OPT
C436
0.01uF
50V
0.01uF
R405
2.2K
OPT
R407-*1
3K
PANEL_DISCHARGE_RES_3K
L412
CIS21J121
120
R444
10K
OPT
R447
1.2K
1%
12V_DET
R488
100K
+3.5V_ST
R480
100
24V_DET
+12V/+15V
R402
100
POWER_DET
C412
0.1uF
16V
24V_DET
IC408
NCP803SN293
1
GND
3
VCC
2
RESET
IC409
NCP803SN293
24V_DET
1
GND
3
VCC
2
RESET
+24V
R482
8.2K
1%
24V_DET
R463
10K
OPT
+3.5V_ST
R404
100K
24V_DET
C411
0.1uF
16V
R450
0
5%
3.5V_DET
R403
1.5K
1%
24V_DET
C474
0.1uF
R448
2.7K
1%
12V_DET
A_DIM
P404
FM20020-24
NORMAL_ANGLE
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
P401
SMAW200-H24S2
SLIM_32~52
19
12V
14
GND
9
3.5V
4
24V
18
INV ON
13
GND
8
GND
3
24V
17
12V
12
3.5V
7
GND
2
24V
16
GND/V-sync
11
3.5V
6
GND
1
PWR ON
20
A.DIM
15
GND
10
3.5V
5
GND
21
12V
22
P.DIM1
23
GND/P.DIM2
24
Err OUT
25
P403
FW20020-24S
NORMAL_STRAIGHT
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
R461
2.2K
+3.3V_Normal
+3.3V_Normal
Q402
RT1P141C-T112
1
2
3
PWM1
R449
100
20111008
37LT670H-UA
POWER_LARGE
4
#13  <--> #20
NC
16
NC
PWM_DIM
18
NC
(PSU)
GND
GND
INV_ON
VBR-A
GND
SHARP
Max 1000mA
Vout=0.8*(1+R1/R2)=1.5319
PWM_DIM
PWM_DIM
Err_out
+1.5V_DDR
PWM_DIM
24
Err_out
CMO10"LED
PWM_DIM
INV_ON
23
INV_ON
GND
16
NC
INV_ON
LGD LPB/ 
GND
Err_out
IPS-@
--> NC
24
FROM LIPS & POWER B/D
PWM_DIM
NC
GND
LGD(PSU)
OS LPB
err_out
or LIPS
PANEL_POWER
(PSU)
err_out
32LE5300-TA
60:PWM
32LE5300-TA
INV_ON
PWM_DIM
INV_ON
NC
<LED MODULE PIN MAP -> latest update 20100618>
22
LGD 10"LED
INV  <--> MAIN
60:NC
S7LR core 1.2V volt
NC
(PSU)
GND
(PSU)
#11  <--> #24
52/60:ERROR
300 mA
GND
NC
GND
INV_ON
(PSU)
NC
AUO 10"LED
NC
<MODULE PIN MAP>
--> NC
+2.5V/+1.8V
#12  <--> #18
18
INV_ON
32LE4500-TA
PIN No
NC
#14  <--> #22
A-DIM
(PSU)
26/32HD:NC
NC
20
GND
NC
PWM_DIM
(PSU)
LGD edge led error-out use or not? checking is necessary...
NC
err_out
20
22
--> NC
AUO 10"Lamp
PIN No
--> NC
err_out
26/32/52:PWM
23
<Module Inv to Main Pin Connection>
CMO10"Lamp
NC
26/32/52:GND
INV_ON
R1
MAX 1A
R2
+3.3V_Normal
3A
3A
1934 mA
+5V_Normal
R1
R2
FOR LPB Download
[To LED DRIVER]
Vout=0.8*(1+R1/R2)=3.36V
Vout=0.8*(1+R1/R2)=5.27V
3A
+5V_USB
2000 mA
Vout=0.8*(1+R1/R2)
R2
R1
$ 0.165
R1
3A
R2
Vout=0.827*(1+R1/R2)=1.225V
Vd=550mV
R1
1.5A
R2
New item
+18.5V --> 3.5V --> 3.75V (3.59V)
+20V --> 3.51V --> 3.76V (3.59V)
+24V --> 3.78V --> 3.92V (3.79V)
+12V --> 3.58V --> 3.82V (3.68V)
Power_DET
+3.5V_ST --> 3.375V --> 3.46V
Display
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