LG 55LH80YD-AB Service Manual page 49

A B
POWER SUPPLY
1
POWER CONNECTOR
P3.3V P6.0V P5.0V_ST
C700 P700
C702
0.1uF SMW250-16P R700
100uF
16V 16V 1K
+6.0V PWR_CTRL
2 1
OPT
+6.0V +6.0V
4 3
2
GND GND
6 5
C701
C703
+3.3V +3.3V
0.1uF 8 7
100uF
16V 16V +5.0V_ST GND
10 9
+5.0V_ST +5.0V_ST
12 11
GND GND
14 13
C707
GND GND
16 15 0.1uF
16V
3
L704
P3.3V D3.3V_2
CB3216UA121
L705
CB3216UA121
C729 C730 C731 C734
10pF 0.1uF 0.01uF 4.7uF
50V 16V 50V 6.3V
D3.3V_1
D3.3V_AVDD_MPLL
L703
BLM18PG121SN1D
C717
0.1uF
16V
4
+3.3V For TMDS Switch
P6.0V
Replaced Part
IC706
D705
AP1117E33G-13
ENKMC2838-T112
A1
C IN
3 NEW 1
A2
2
C752 C753
OUT
10uF 0.1uF
10V 16V
5
EAX60902801(0)_AUS_JUNO_AVBOX
6
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.
Copyright ⓒ 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C
+5.0V For USB & Etc
P6.0V
VCC
C711 C716 R701
PWR_CTRL
003:F3 100uF 0.1uF 1K
16V 16V
C706
10uF
16V
C709
100uF
16V
+1.26 Core for Saturn6
P6.0V
465 mA @85% efficiency
L711
CB3216PA501E
R706 1K
Vout=0.8*(1+R1/R2)
C735
47uF D701 Close to IC
16V SML-201MT
Placed on SMD-TOP
C786 C787
22uF
22uF
OPT
C IN
D3.3V_3
+1.8V for Saturn6 DDR
ADJ/GND
C754
C755
10uF 0.1uF
6.3V
16V
D3.3V_1
BLM18PG121SN1D
L702
R710
10K
C712 C713
10uF
0.1uF
10V 16V
D E
+1.8V For HDMI TX
IC700
D5.0V_1 D3.3V_2
BA50BC0WFP-E2 IC703
AP1117E18G-13
OUT IN NEW
2 4 3
2
OUT
C718 C719
CTL GND NC
100uF 0.1uF
16V 16V
C723 C724 C725
47uF 0.1uF 47uF
16V 16V 16V
D3.3V_1
MAX 3A
R738
Replaced Part
10K
R731 10K
OPT C790
Close to IC
0.1uF
R736 22K
16V OPT
1%
IC705
1600 mA
R723
MP2212DN
22K
R1
$0.07
1%
4.9A 0.0150OHM 34MHZ
FB EN/SYNC 3A, DCR=0.025 ohm
1 8
NEW
R722
L726 L717
75K
R2
3.6uH BLM18PG121SN1D
1% GND SW_2
2 7
$0.24
NR8040T3R6N
C OUT
IN SW_1
3 6
C792
C791
22uF 22uF
OPT
D703 BS VCC
16V 16V
4 5 C789
10nF
100V
Placed on SMD-TOP
50V
1N4148W_DIODES
R742 47
R724 10
1%
C788
1uF
16V
D1.8V_DDR
IC701
SC4215ISTRT
NC_1 GND R711
1 8
12K
1%
EN ADJ
2 7
VIN VO
3 6
NC_2 NC_3 R712 C714 C715
4 5
9.1K 22uF 0.1uF
16V
1% 16V
R1/R2 : 27K / 20K => Vout=1.88
R1/R2 : 15K / 12K => Vout=1.80
R1/R2 : 12K / 9.1K => Vout=1.85
F G
Stand-by +3.3V
D1.8V_1 P5.0V_ST
Replaced Part
IC702
ADJ/GND
1
AP1117E33G-13
L724
CB3216PA501E
IN NEW ADJ/GND
3 1
2
C704 C705
OUT
10uF 0.1uF
10V 16V
C726
0.1uF
16V
+3.3V
P6.0V
L716
CB3216PA501E
OPT
R733 10K
Vout=0.8*(1+R1/R2)
Close to IC IC704
D1.26V_VDDC
MP2212DN
R770
R1 56K
1%
FB
1
NEW
R769
18K
R2 GND
1%
2
IN
3
D700
BS
OPT
C732 C733 4
22uF 100V
22uF
1N4148W_DIODES
16V OPT
C793
0.1uF
Placed on SMD-TOP
R734
10
1/10W
1%
GND
Switch for +5.0V (WIRELESS)
P5.0V_ST
B
WIHD_PWR_EN R703 10K
003:F2
R702
120K
H
D3.3V_L
R772 4.7K
C708
C710
D704
10uF
0.1uF
SML-512UW
6.3V 16V
OPT
003:F3
D3.3V_EN
D3.3V_1
L727
BLM18PG121SN1D
EN/SYNC OPT
8
GND
L710
3.6uH
SW_2
7
NR8040T3R6N
SW_1
C751 C750
C746
6
22uF
10uF 0.1uF
16V
6.3V
C741
VCC
5 10nF
50V
R737
47
C737
1uF
GND GND GND
10V
GND
D5.0V_W
L700 L701
CB3216UA121 CB3216UA121
OPT
Q701
SI4925BDY
S1 1 8 D1_2
R704 C720 G1 2 7 D1_1
47K 10uF
OPT
S2 3 6 D2_2
R705 C721 G2 4 5 D2_1
2.7K 0.1uF
16V
C
Q700
2SC3052
E
C722
8.0PI
OPT
JUNO-BOX 081226
POWER 10
LGE Internal Use Only
10