LG EC970W - BLOCK DIAGRAMS; Power Block Diagram

3-22 3-23
BLOCK DIAGRAMS
1. Power Block Diagram
5.4VA
TO SYS, TU/IF
HOT CIRCUIT
BD101
R101
R106 R102
C103
C113
C112
HOT GND
F101
WH
(BL)
BK
(BR)
PW101
6
7
8
9
10
3
2
4
3
11
12
1
2
IC102
IC103
4
T101
TRANSFORMER
4
2
3
1
RECTIFIER
& SMOOTHING
DRIVE & S/W BLOCK
OVER CURRENT LIMIT
BLOCK
+
TO Hi-Fi
TO TU/IF
12V
TO CAPSTAN M
24/12VA
33V
TO AV, TU/IF,
5.2VT
TO DRUM
12VA
5.2V
TO Hi-Fi, Sensor
SECAM
D152
D154 D155
D151
SNUBBER
BLOCK
(IC101, R109, C135, D103,
R103,C109, R125, R126)
(D102,R104,
C105,C106)
(D109, C120,
L104,C121)
NOTES : Symbol denotes AC ground.
Symbol denotes DC chassis ground.
!
!
!
!
!
!
!
!
FROM µ-COM
P.CTL"H"
LINE FILTER
BLOCK
(C101,L102,
C102)
RECTIFIER
& SMOOTHING
(D105, C115)
34V S/W
BLOCK
(Q154, R154,
R155)
5VT SW
BLOCK
(Q157, R170,
R171, D157)
5V S/W
BLOCK
PWR CTL
BLOCK
(Q155, R156,
R157, D158)
(Q162, R161)
FEED-BACK
BLOCK
(R116,R117,R118
R119,R120,R121
C114)
'00 11. 30
F. µ-com
HSR "H"
Q161
R163
Q152, ZD152,
R153, C155
24V S/W
Q159,R166,R167
RECTIFIER
& SMOOTHING
(D106, C116,
L103,C117)
RECTIFIER
& SMOOTHING
(D110, C123)