Block Diagrams; Power Block Diagram - LG GC260W Service Manual

BLOCK DIAGRAMS

1. Power Block Diagram

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