LG 55UB820T, Service Manual

Page: 28 / 89

THERMAL
THERMAL
THERMAL
THERMAL
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.
C504
0.1uF
16V
+3.3V_NORMAL
L501
BLM18PG121SN1D
3.3V_EMMC
C506
22uF
10V
L500
BLM18PG121SN1D
L506
2uH
C508
0.0068uF
50V
ZD501
5V
C500
10uF
16V
+12V
POWER_ON/OFF2_1
IC500
BD86106EFJ
EAN62653301
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SW_1
8
SW_2
9
[EP]
C514
47pF
50V
OPT
C503
0.1uF
16V
OPT
+3.3V_NORMAL
C507
0.1uF
16V
R503
10K
C501
10uF
16V
R512
30K
1%
R511
1.5K
1%
R513
10K
1%
C548
0.1uF
16V
PD_20_24V
+12V
C547
0.1uF
16V
+24V
R534
2.7K
1%
PD_+12V
+3.5V_ST
R542-*2
9.1K
1%
PD_UHD_24V
R535
1.2K
1%
PD_+12V
+3.5V_ST
R543-*2
1.6K
1%
PD_UHD_24V
R555
10K
OPT
R542
8.2K
1%
PD_24V
R542-*1
5.6K
1%
PD_20V
R543
1.5K
1%
PD_24V
POWER_DET
R545
0
5%
PD_+3.5V
R550
100K
R543-*1
1.3K
1%
PD_20V
C557
0.1uF
16V
R549
100K
PD_20_24V
R526
1.8K
Q502
2SC3052
E
B
C
+12V
L509
MLB-201209-0120P-N2
L510
MLB-201209-0120P-N2
R531
2K
OPT
C531
10uF
25V
OPT
C525
0.01uF
50V
C528
10uF
25V
R525
10K
Q503
AO4423
EBK61313101
AO4423
3
S3
2
S2
4
G
1
S1
5
D1
6
D2
7
D3
8
D4
R528
2K
OPT
C527
10uF
25V
C521
10uF
25V
OPT
R518
10K
C529
10uF
25V
OPT
C534
0.1uF
25V
C523
0.1uF
25V
PANEL_CTL
R516 0
OPT
+3.3V_NORMAL
R510
10K
VBY1_LOCK_LED
+3.5V_ST
R508 22
VBY1_LOCK_LED
LD500
VBY1_LOCK_LED
R515
11K
VBY1_LOCK_LED
Q501
2SC3052
VBY1_LOCK_LED
E
B
C
R514 1.5K
VBY1_LOCK_LED
C512
100uF
R551
100K
5%
R
5
4
1
1
6
K
1
%
C536
10uF
35V
OPT
R538
10K
/USB_OCD3
L513
120-ohm
R548
0
C551
82pF
50V
USB_CTL2
C544
2200pF
50V
POWER_ON/OFF1
C549
0.047uF
25V
USB_CTL3
R554
100K
5%
C550
0.047uF
25V
/USB_OCD2
R546
10K
R533
0
5%
C552
1uF
10V
+5V_USB_2
+24V
C546
100pF
50V
OPT
+5V_USB_3
C
5
3
9
1
u
F
2
5
V
R
5
3
7
1
6
K
1
%
C556
10uF
10V
C540
0.1uF
50V
C541
0.0068uF
50V
C538
10uF
35V
+5V_NORMAL
R509
1K
C505
0.1uF
50V
+24V
+3.5V_ST
L508
UBW2012-121F
RL_ON
C502
0.1uF
16V
Q500
MMBT3906(NXP) 1
2
3
+3.5V_ST
PWM_DIM
R501
10K
L502
UBW2012-121F
R507 100
L507
UBW2012-121F
+3.3V_NORMAL
PWM_DIM2
INV_CTL
+12V
L503
UBW2012-121F
R500
10K
C518
0.1uF
50V
L504
UBW2012-121F
IC505
APX803D29
1
GND
3
VCC
2
RESET
IC506
APX803D29
PD_20_24V
1
GND
3
VCC
2
RESET
C515
10uF
16V
+12V
C516
10uF
16V C517
10uF
16V
R505
33
1%
R504
75
1%
+3.3V_NORMAL
R506
1
ZD500
2.5V
OPT
IC501
AZ1117EH-ADJTRG1
EAN62868801
ADJ/GND
OUT IN
+1.8V
DVDD18_EMMC
C510
22uF
10V
+1.8V
L505
BLM18PG121SN1D
C509
0.1uF
16V
R556
0
5%
OPT
R557 0
5%
OPT
POWER_DET_1
IC503
SN1302001(TPS65286RHDR)
EAN62911501
1
VIN_1
3
VIN_3
7
V7V
9
EN
10
SW_OUT2
11
SW_OUT1
12
SW_EN2
13
SW_EN1
14
NFAULT2
15
NFAULT1
16
SW_IN1
17
SW_IN2
18
BST
19
LX_1
20
LX_2
21
LX_3
22
SS
23
FB
24
COMP
25
RLIM
26
RSET1
27
RSET2
28
AGND
5
PGND_2
8
MODE/SYNC
6
PGND_3
4
PGND_1
2
VIN_2
29
[EP]
P500
SMAW200-H24S5
EAG63590902
19
24V
14
12V
9
GND
4
PDIM#2
18
24V
13
12V
8
3.5V
3
PDIM#1
17
GND
12
12V
7
3.5V
2
INV CTL
16
GND
11
12V
6
GND
1
PWR ON
20
24V
15
12V
10
GND
5
3.5V
21
24V
22
24V
23
GND
24
GND
25
L514
BLM18PG121SN1D
L516
3.6uH
SM-8040
C537
10uF
16V
C558
22uF
10V
POWER_ON/OFF2_4
IC504
TPS54327DDAR
EAN61832901
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
R560
10K
C555
22uF
10V
C545
3300pF
50V
+1.15V_CPU
C543
1uF
10V
C542
100pF
50V
C553
0.1uF
16V
+12V
Q504 2N7002A
S
G
D
VID0
R536
0 5%
R561 100
NON_G+
R562
100
R547
10K
1%
PANEL_VCC
+1.1V_CORE
POWER_ON/OFF2_4
C564
100uF
ZD502
5V
C565
47pF
50V
C560
10uF
16V
C563
0.0068uF
50V
IC502
BD86106EFJ
EAN62653301
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
SW_1
8
SW_2
9
[EP]
R564
10K
L518
2uH
R566
10K
1%
C561
0.1uF
16V
OPT
C562
0.1uF
16V
L517
BLM18PG121SN1D
+12V
R563
6.8K C559
10uF
16V
R565
10K
1%
+12V
L511
BLM18PG121SN1D
L512
3.6uH
SM-8040
C519
10uF
16V
C532
22uF
10V
POWER_ON/OFF2_3
R519
3.6K
1%
IC507
TPS54327DDAR
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
R521
10K
C530
22uF
10V
+1.5V_DDR
C524
3300pF
50V
R517
18K
1%
C522
1uF
10V
C520
100pF
50V
R520
22K
1%
C526
0.1uF
16V
C533
0.1uF
16V
R
5
4
4
1
5
0
K
1
%
R552
6.8K
1%
R553
51K
1%
C535
10uF
10V
C566
10uF
10V
C567
0.1uF
C568
0.1uF
PWM_TIN
PWM_TOUT
R502
20K
Q503-*1
AO4447A
AO4447
EBK61313102
3
S_3
2
S_2
4
G
1
S_1
5
D_1
6
D_2
7
D_3
8
D_4
L515
4.7uH
ZD503
5V
C569
22uF
10V C570
22uF
10V
R567
13K
1%
+3.3V_NORMAL
R570
10K
R568
33
G+
R569
33
G+
R540
100K
1%
R559
5.6K
1%
R558
16K
1%
R539
120K
1%
C511
10uF
10V C513
10uF
10V
Q505 2N7002A
S
G
D
VID1
+3.3V_NORMAL
R571
0 5%
R572
10K
R573
150K
1%
R574
180K
1%
eMMC POWER
5V/3.3V->1.5V/1.1V->1.0V
POWER UP SEQUENCE
+5.0V normal & USB
Power_DET
MAX A
Vout=0.8*(1+R1/R2)
6A
Placed on SMD-TOP
+3.3V_NORMAL
R2
R1
ST_3.5V-->3.5V
24V-->3.48V
not to RESET
at 8kV ESD
12V-->3.58V
20V-->3.51V
PANEL_POWER
TYP 6000mA
Vout=0.6*(1+R1/R2)
R2
R1
6A
’14 UHD POWER
+1.1V or +1.13V _CORE
+1.8V - eMMC 4.51(LG1311-B0)
& Vx1 pull-up
2013-10-28
POWER
UB83
05
3A
R1
R2-1.1V
Core 1.1V or 1.15V
Vout=0.765*(1+R1/R2)=1.154V
Switching freq: 700K
R2-1.15V
R1
R2
Placed on SMD-TOP
6A
Vout=0.8*(1+R1/R2)
R1
Vout=0.765*(1+R1/R2)=1.516V
R2
DDR +1.5V
Switching freq: 700K
3A
R1:10K/R2:23K, V=1.148V Voltage drop 0.042V
Vout=0.765*(1+R1/R2)=1.119V
R2-1.13V
R2-1.1V
R1:10K/R2:21.5K, V=1.172V Voltage drop 0.042V
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