LG DP270B, Service Manual

Page: 36 / 53

3-29
2. POWER BLOCK DIAGRAM
Battery
Ch
arge Circuit
BAT Con
AC/DC Adapter
9V
in in
BATB
A
T
ou o
u
t
FET
SW S
W
(9V(9
V
i i
n)
ChaC
h
a
rgerg
e E
E
nan
ableb
le
ChaC
h
arger
g
e
TheT
h
e
rmirm
ists
te
r
Divide
Divide
DC D
C
SenS
en
sese
BATB
A
T Se
S
ensn
se
DC-DC DC-DC DC-DC
DC-DC
Reg
PowP
o
w
er er
CTC
TL
LCD Grid
Reg
5VA5V
A
5V5V
3.33.
3
V
1.81.
8
V
S/W S/W
DVBD
V
B
3. 3
.3V3
V
SW(S
W
(TU/T
U
/DVD
V
D
)
D5VD
5V
Vo
ltage In
verter
-5V-5
V
StaS
ta
ndbn
d
b
y
StaS
ta
ndbn
d
b
y
StaS
ta
ndbn
d
b
y
LCD
Panel Vi
deo
Au
di
o
Sy
ste
m
Servo
5VA5V
A
5V5V
3.33.
3
V
1.81.
8
V
-5V-5
V
3.33.
3
V
LCD
Vcc
7.57.
5
V
15V15
V
-10-1
0
V
D5VD
5V
7.57.
5
V
15V15
V
-10-1
0
V
D5VD
5V
5VA5V
A
S/W
DVBD
V
B 5V 5
V
SW(S
W
(TU/T
U
/DVD
V
D
)
D5VD
5V
5V5V
3.33.
3
V
Charge Discharge
AATA
A
T1101
10
2
GT6G
T
6
31231
2
AP1A
P
1
62462
4
MP1M
P
1
41141
1