Read LG 32LS3800 (CHASSIS:LB21C / LB21F) Service Manual online
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.
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.
POWER_LARGE
2011/10.05
R414
GP4L_S7LR2
RL_ON
R462
10K
C439
100pF
50V
C416
0.1uF
0.1uF
16V
OPT
+3.5V_ST
R426
10K
10K
C443
10uF
10uF
25V
R430
10K
10K
+3.3V_Normal
+3.5V_ST
+24V
C453
22uF
22uF
10V
C437
22uF
16V
22uF
16V
ERROR_OUT
C403
10uF
10V
10uF
10V
R434
10K
IC407
AP7173-SPG-13 HF(DIODES)
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[EP]
C444
0.1uF
16V
0.1uF
16V
R429
47K
47K
OPT
R486
4.7K
4.7K
OPT
IC408
NCP803SN293
PWR_DET_ON_SEMI
1
GND
3
VCC
2
RESET
+3.5V_ST
POWER_DET
C408
0.1uF
16V
0.1uF
16V
OPT
POWER_ON/OFF_1
+3.5V_ST
R432
330K
1/16W
5%
PANEL_VCC
R428
10K
10K
IC409
NCP803SN293
PD_+24V_PWR_DET_ON_SEMI
1
GND
3
VCC
2
RESET
C441
0.1uF
16V
+3.3V_Normal
R480
100
100
PD_+24V/PD_+3.5V_#2
R
4
4
2
2
7
K
1
/
1
6
W
1
%
10uF
C461
10V
+1.10V_VDDC
L413
C435
0.1uF
16V
+3.5V_ST
+12V/+15V
R461
10K
10K
OPT
+1.5V_DDR
+12V/+15V
+3.5V_ST
L403
BLM18PG121SN1D
C425
0.1uF
16V
+3.3V_Normal
C407
0.1uF
16V
0.1uF
16V
OPT
C476
0.1uF
16V
R404
100K
PD_+24V/PD_+3.5V_#2
R439
33K
R419
1K
L420
BLM18PG121SN1D
C418
0.1uF
50V
C456
22uF
22uF
10V
PANEL_CTL
1:AK10
C430
10uF
10V
10uF
10V
560pF
C467
50V
C431
0.1uF
16V
0.1uF
16V
R421
10K
10K
C406
0.1uF
16V
0.1uF
16V
R435
22K
22K
OPT
+3.5V_ST
+3.5V_ST
R406
4.7K
4.7K
C432
0.1uF
16V
0.1uF
16V
R433
10K
10K
R418
6.8K
OPT
Q409
AO3407A
G
D
S
R456
4.7K
1/16W
1%
1/16W
1%
R401
10K
P401
SMAW200-H24S2
19
12V
14
GND
9
BAT DET
4
24V
18
INV ON
13
GND
8
GND
3
24V
17
A/D
12
3.5V
7
BAT UVLO
2
BATT SLEEP
16
AC DET
11
3.5V
6
GND
1
PWR ON
20
12V
15
OVER VTG
10
3.5V
5
GND
21
STATUS
22
P.DIM1
23
CHG ON/OFF
24
Err OUT
25
R427
10K
OPT
R436
15K
15K
R431
22K
OPT
C411
0.1uF
16V
0.1uF
16V
IC402
TJ3940S-2.5V-3L
1
GND
2
VOUT
3
VIN
C440
0.1uF
16V
0.1uF
16V
PWM_DIM
R490
10K
OPT
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]
R488
100K
100K
C475
0.1uF
16V
+3.3V_Normal
R475
0
0
OPT
C474
0.1uF
0.1uF
R440
5.6K
+12V/+15V
+3.5V_ST
C445
0.1uF
16V
0.1uF
16V
OPT
+24V
C404
0.1uF
16V
+3.3V_Normal
100
R420
OPT
INV_CTL
R489
10K
R446
10K
OPT
R
4
4
1
5
6
K
1
/
1
6
W
1
%
R463
10K
OPT
+2.5V_Normal
C412
0.1uF
16V
0.1uF
16V
PD_+24V/PD_+3.5V_#2
R402
100
100
R415
100
100
+3.3V_Normal
R438
22K
22K
R443
10K
10K
R457
4.3K
4.3K
1/16W
1%
1%
C472
22uF
10V
L415
3.6uH
NR8040T3R6N
IC408-*1
APX803D29
PWR_DET_ON_DIODES
1
GND
3
VCC
2
RESET
IC409-*1
APX803D29
PD_+24V_PWR_DET_DIODES
1
GND
3
VCC
2
RESET
C436
0.01uF
50V
OPT
C448
3300pF
50V
C488
3300pF
R403
1.5K
1%
PD_+24V
R448
2.7K
1%
PD_+12V
R450
0
5%
PD_+3.5V_#1
R473
1
R482
8.2K
1%
PD_+24V
CHG_ON/OFF
C409
0.015uF
50V
0.015uF
50V
Q400
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
Q401
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
Q405
MMBT3904(NXP)
E
B
C
Q406
MMBT3904(NXP)
MMBT3904(NXP)
OPT
E
B
C
Q407
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
C447
0.33uF
16V
+12V/+15V
R608
12K
12K
R410
10K
L401
L425
BLM18PG121SN1D
+5V_Normal
C4072
100pF
100pF
OPT
C420
22uF
16V
22uF
16V
C405
10uF
25V
10uF
25V
OPT
C492
22uF
16V
22uF
16V
OPT
L406
3.6uH
IC401
AOZ1051PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SS
8
NC
9
[EP]LX
R609
11K
11K
1%
R416
56K
56K
1%
+5V_USB
R423
12K
1%
C4073
0.1uF
16V
0.1uF
16V
OPT
C4074
0.1uF
16V
0.1uF
16V
OPT
C4075
10uF
25V
10uF
25V
R447
1.2K
1/16W
1%
PD_+12V
Q402
MMBT3906(NXP)
1
2
3
R610
33K
OPT
C494
2200pF
50V
2200pF
50V
C493
0.01uF
50V
0.01uF
50V
C438
0.1uF
25V
0.1uF
25V
C455
0.1uF
25V
0.1uF
25V
C451
0.1uF
25V
OPT
C442
10uF
25V
25V
OPT
R611
0
0
R606
3.9K
OPT
AC_DET
A/D
STATUS
BAT_DET
OVER_VTG
BAT_UVLO
L412
CIS21J121
120
BATT_SLEEP
AC_PWM
BAT_PWM
R4041
0
0
PWM_DIM
R400
0
0
OPT
C400
0.1uF
16V
0.1uF
16V
C401
0.1uF
16V
0.1uF
16V
OPT
C402
0.1uF
16V
0.1uF
16V
OPT
C410
0.1uF
16V
0.1uF
16V
OPT
C413
0.1uF
16V
0.1uF
16V
C414
0.1uF
16V
0.1uF
16V
OPT
C415
0.1uF
16V
0.1uF
16V
OPT
C417
0.1uF
16V
0.1uF
16V
OPT
R405
5.6K
5.6K
R407
5.6K
5.6K
R413
100
R424
470K
OPT
R409
470K
OPT
R408
470K
OPT
R414
470K
OPT
R411
100
R422
100
R417
100
R412
100
L407
MLB-201209-0120P-N2
L404
MLB-201209-0120P-N2
L402
MLB-201209-0120P-N2
Q403
AO3435
G
D
S
R445
2.2K
C423
2.2uF
10V
+3.5V_ST
R425
0
5%
PD_+3.5V_#2
FROM LIPS & POWER B/D
R2
+1.5V_DDR
’ERROR_OUT’ is used for
lamp(CCFL/EEFL) models.
In other words,
LED models need not use.
lamp(CCFL/EEFL) models.
In other words,
LED models need not use.
Power_DET
24V-->3.78V --> 3.92V (3.79V)
12V -->3.58V --> 3.82V (3.68V)
Vd=550mV
+2.5V/+1.8V
R1
+3.3V_Normal
Vout=0.8*(1+R1/R2)=1.5319
Vout=0.827*(1+R1/R2)=1.225V
R1
R2
$ 0.165
S7LR core 1.2V volt
ST_3.5V--> 3.375V --> 3.46V
780 mA
Max 1000mA
18.5V-->3.5V --> 3.75V (3.59V)
300 mA
1.5A
PANEL_POWER
3A
20V-->3.51V --> 3.76V (3.59V)
+5V_USB
R2
3A
R1
2000 mA
Vout=0.8*(1+R1/R2)
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