50PZ570G-ZB, 50PZ570S-ZB, 50PZ575S-ZB (CHASSIS:PD12C) - LG TV Service Manual (repair manual). Page 17

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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.
C531
0.1uF
16V
C501
0.1uF
16V
OPT
R506
2K
OPT
+0.9V_CORE
+5V_ST
+5V_ST
POWER_ON/OFF_2
P_+5V
R520
3.6K
+5V_MAIN
AC_DET
C561
0.1uF
50V
C536
10uF
6.3V
OPT
C563
10uF
16V
OPT
+5V_MULTI
C511
0.1uF
16V
C565
10uF
16V
OPT
RL_ON
C512
0.1uF
16V
C554
0.01uF
50V
PSU_ERR_DET
IC500
AP2121N-3.3TRE1 
1
GND
2
VOUT
3
VIN
C506
0.1uF
16V
R509
100
C535
10uF
6.3V
OPT
C502
10uF
16V
P_17V
R533
20K
1%
+5V_MAIN
R512
0
C525
0.1uF
16V
OPT
L503
MLB-201209-0120P-N2
C516
0.1uF
16V
+5V_ST
POWER_ON/OFF_2
R508
100
+5V_ST
R518
10K
OPT
P_17V
C582
15pF
50V
C528
100uF
16V
MOD_ON
R532
105K
1%
R519
16K
C560
0.015uF
50V
C524
10uF
16V
R501
10K
OPT
C514
10uF
6.3V
OPT
R507
10K
OPT
C522
100uF
25V
OPT
C530
0.1uF
16V
C526
0.1uF
50V
P_+5V
C551
4.7uF
50V
OPT
P500
SMAW200-H18S1
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
15
10
5
19
L502
MLB-201209-0120P-N2
C532
0.1uF
16V
C558
0.1uF
50V
OPT
+3.3V_ST
+5V_MAIN
C589
0.1uF
16V
C590
10uF
6.3V
C591
0.1uF
16V
+2.5V_BCM35230
R534
1K
1%
R511
910
1%
R540
66.5
1/10W
1%
L508
3.6uH
R523
10K
OPT
POWER_ON/OFF_2
C559
0.1uF
16V
OPT
C550
0.1uF
50V
C593
0.1uF
16V
+3.3V_Normal
+5V_MULTI
R538
0
1/10W
2012
C510
10uF
6.3V
C585
10uF
6.3V
OPT
C540
22uF
16V
+3.3V_Normal
C537
0.1uF
50V
+3.3V_TU
C541
0.1uF
16V
C544
0.1uF
16V
C546
0.1uF
50V
+1.25V_TU
+3.3V_TU
C538
10uF
16V
C539
0.1uF
16V
R542
1.2K
OPT
R541
10
L500
MLB-201209-0120P-N2
L504
MLB-201209-0120P-N2
L506
MLB-201209-0120P-N2
L515
120-ohm
L516
MLB-201209-0120P-N2
IC506
TPS54231D
3
EN
2
VIN
4
SS
1
BOOT
5
VSENSE
6
COMP
7
GND
8
PH
D500
40V
SMAB34
C581
10uF
16V
C577
10uF
16V
C521
10uF
6.3V
C520
10uF
6.3V
OPT
R500
10K
1%
R503
2K
1%
R546
330K
C595
0.01uF
C594
0.1uF
50V
R545
0
OPT
L518
R527
22
+5V_TU
C596
3300pF
50V
OPT
R547
0
5%
R522
10K
R530
0
C509
22uF
10V
R524
150
1%
+5V_ST
R502
10K
C505
0.47uF
25V
C513
0.1uF
16V
C507
10uF
10V
+1.5V_DDR
+3.3V_ST
POWER_ON/OFF_2
Q501
2SC3052
E
B
C
Q504
RTR030P02
S
D
G
R526
1K
1%
R505
10K
R525
75
1%
C518
10uF
6.3V
C519
10uF
6.3V
OPT
C598
10uF
6.3V
C597
10uF
6.3V
C578
10uF
6.3V
C579
10uF
6.3V
C515
10uF
6.3V
C529
10uF
6.3V
C549
10uF
25V
L519
OPT
+5V_MULTI
L512
22.0uH
R551
4.7K
R553 0
OPT
L501
2uH
R504
16K
C504
1000pF
50V
R554
1
R555
1
C527
100uF
16V
R552
120-ohm
BLM18PG121SN1D
IC503
AZ1117BH-ADJTRE1
1
ADJ/GND
2
OUTPUT
3
INPUT
IC501
AOZ1037PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
PGOOD
8
NC
9
[EP]LX
R550
10K
R529
51K
R510
0
C576
470pF
50V
R521
13K
C557
3300pF
50V
C592
100pF
50V
IC505
SN1007054RTER
1
VIN_1
3
GND_1
7
COMP
9
SS
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]
IC504
AZ1085S-ADJTR/E1
1
ADJ/GND
2
OUTPUT
3
INPUT
R537
0
1/4W
3216
C508
0.1uF
16V
OPT
R528 51K 1%
R535 16K 1%
C553
22uF
10V
C517
10uF
16V
C503
10uF
16V
C523
10uF
16V
C500
10uF
16V
C533
10uF
6.3V
R513
1
IC507
AZ1085S-ADJTR/E1
1
ADJ/GND
2
OUTPUT
3
INPUT
POWER
5
EAX63525101
19
Max 420mA
R2
R1
17V->5V
Vout=0.8*(1+R1/R2)
fr. PWR SUPPLY UNIT
+3.3V_Stand_By
Switching freq: 555K
+1.5V_DDR
+0.9V_CORE_BCM35230
Placed on SMD-TOP
R1
R2
MAX 4000 mA
-->3.12V
+5V_MULTI Switch
+5V_NORMAL
R1
R2
V0 = 1.25(1+R2/R1)
3A
R2
+3.3V_NORMAL
R1
Max 960mA
2A
TUNER
PLACE THE NEAR TO TUNER
1A
R1
R2
V0 = 1.25(1+R2/R1)
5A
Vout=Vref*(1+R1/R2)|Vref=0.8
Vout=Vref*(1+R1/R2)|Vref=0.827
Closed to Tuner
V0 = 1.25(1+R2/R1)
R1
R2
*NOTE 21
*NOTE 13
*NOTE 17
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