LG 55LH40 / 55LH41 / 55LH400С (CHASSIS:LA92B) Service Manual ▷ View online
- 33 -
C
2009
POWER MANAGEMENT
POW
ER
M
ANAGEMENT
+12
V
S
I4925
12V_
T
C
O
N
M
P
2212
+
5
V_
EX
T
A
S
7809D
+5V
_TU
+
5
V_
ST
S
I4925
T
P
S2042
+9V
K
IA
78R05
F
L
706
+5.2V
A
P
1117
+3.3V
_
S
T
+3.3V
_
A
VDD_M
PLL
L703
T
D
V
H
-103
M
S
D
3158
MA
X810
0
V
=>
+3.3V=>0
V
R
ese
t
M
S
D
3158
MA
X3232C
L1209
L1200
E
y
e
-Q
:C
M
3212
A
T
24C02
B
N
L1201
LED/
IR
L
715
+12
V
C
A
T
2
4WC
A
P
1117
+3.3V
_
A
VDD_M
PLL
M
S
D
3158
v
PA
N
E
L
_
C
T
L
EN
EN
PO
WE
R
_
O
N
/O
FF
,
P
O
WER_
ON
_D
EL
A
Y
EN
Modul
e-T
con
+24
V(P
SU),
2
0V(
Lip
s)
L
602
+
2
4V_A
M
P
(P
S
U)
,20V_A
M
P
(L
ips)
N
T
P3100
L
SSM
6N1
5
F
U
+3.3V
_
S
T
+5V
L
709
+5V
_G
ENER
A
L
M
P
2212
+12
V
M
P
2212
EN
+
5
V_
EX
T
S
C
156515
S
C
4215
+3.3V
_
P
V
S
B
+1.2V
_
P
V
S
B
+3.3V
_
A
VDD_P
VSB,
+3.3V
_D
VDD_
P
VSB
+1.2V
_D
VDD_
P
VSB
L
G
DT3305
+3.3V
N
T
P3100
L
A
Z
1117
+1.8V
_
A
M
P
N
T
P3100
L
S
C
4215
+1.8V
_DDR
+
1
.8
V_S_
D
D
R
M
S
D
3158
H
Y
B
18T
C
512160
B2
F
M
X
25
L3205
M
P
2212
+1.2
6
V
_
VDDC
L
711
L
717
IC705
M
S
D
3158
v
+3.3V
_MEMC
W2
5X20
M
P
2212
D
N
+1.8V
_MEMC
A
PE8953
+1.2
6
V
_MEMC
M
S
T
7329
Nc
M
S
T
7329
N
M
S
T
7329
N
JS
T1223
T
D
A
9996
+3.3V
_HDMI
A
T
24C512
B
W
T
D
A
9996
+1.8V
_HDMI
EN
EN
EN
EN
VSB_CTRL
+5V
_G
ENER
A
L
EN
AV
D
D
_
A
U
AV
D
D
A
V
DD_MEMPLL
A
V
DD
_L
PLL
A
V
DD
_DM
AV
D
D
_
O
T
G
+3.3V
_
VDDP
M
S
D
3158
v
- 34 -
C
2009
MAIN IC => POWER MANAGEMENT
+
5
V_
ST
A
P
1117E33G
+3.3V
_
S
T
+3.3V
_
A
VDD_M
PLL
MA
X810
R
ese
t
+5V
+5V
_G
ENER
A
L
AV
D
D
_
A
U
AV
D
D
M
P
2212
D
N
+1.2
6
V
_
VDDC
M
P
2305
D
S
A
V
DD_MEMPLL
A
V
DD
_L
PLL
A
V
DD
_DM
AV
D
D
_
O
T
G
+3.3V
_
VDDP
+3.3V
S
C
4215
+1.8V
_DDR
L
101
Saturn5/L
G
E3159
Saturn5/L
G
E3159
L
715
L
703
L
709
L
711
L
109
L
103
L
106
L
108
L
107
L
102
W7
AV
D
D
_
A
U
J7
~
N
7
A
V
D
D
_33_1
~
5
H1
7,
T
2
0,
V
2
0
A
V
DD_MEMPLL
R2
0
A
V
DD
_L
PLL
W8
A
V
DD
_DM
H8
AV
D
D
_
U
S
B
H9~W10
VDDP
_
1
~8
G12~W18
A
V
DD
_DDR
_
1~1
1
D1
6~Y
2
2
VDDC_1~2
7
H7
A
V
DD
_MPL
L
EN
EN
Main IC =>
POWER MANAGEMENT
D4
HWRESET
L
717
IC702
IC103
IC704
IC705
IC701
IC100
S
I4925
EN
Q706
PO
WE
R
_
O
N
/O
FF
,
PO
W
E
R
_
O
N
_
D
E
L
A
Y
L
720
+
5
V_
ST
EN
- 35 -
C
2009
MAIN IC => POWER MANAGEMENT
+5V
M
P
2212
D
N
+1.8V
_MEMC
M
P
2305
D
S
+3.3V
Ursa1/LGE7329
Ursa1/LGE7329
L
715
FRC IC => POW
E
R MANAGEMENT
A
PE8953
+1.2
6
V
_MEMC
L
714
+3.3V
_MEMC
EN
M
S
D
3158
M11
RES
ET
+3.3V
_
S
T
K
6
~
J11
A
V
DD
_DDR
1~7
L9
A
V
DD_MEMPLL
E5
~
H
6
VDDC_1~5
L
803
L
800
MEMC_RES
ET
R
248
:100
IC707
IC704
IC708
IC100
IC801
+12
V
M
P
2212
EN
IC706
+
5
V_
EX
T
S
I4925
EN
Q706
PO
WE
R
_
O
N
/O
FF
,
PO
W
E
R
_
O
N
_
D
E
L
A
Y
EN
L
709
+5V
_G
ENER
A
L
EN
+
5
V_
ST
- 36 -
300
121
120
200
806
400
540
520
804
803
802
801
805
510
310
500
122
550
530
810
910
900
820
A2
LV1
A10
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
Click on the first or last page to see other 55LH40 / 55LH41 / 55LH400С (CHASSIS:LA92B) service manuals if exist.