Block Diagram & Signal Flow; Power(Smps) Block Diagram - LG LSS-3200A Service Manual

BLOCK DIAGRAM & SIGNAL FLOW

1. POWER(SMPS) BLOCK DIAGRAM

BD101
NOISE FILTER
BL OCK
(C101,L102,
L101, C102)
!
FUSE
(F101)
!
BR BL
(BK) (WH)
TH01
+
SNUBBER
BL OCK
C103
(D101,C105
C106,R103,R104)
DRIVE & S/W BL OCK
SOFT-START BL OCK
(IC101, D102, R105,
C108, C109 , R101,
R102)
!
Y-CAP
C110
!
Y-CAP
C111
3-51
T101
!
TRANS
RECTIFIER &
22
2
SMOOTING BLOCK
21
(D128,C133)
RECTIFIER &
SMOOTING BLOCK
20
(D127,C131,L125,C132)
6
RECTIFIER &
19
SMOOTING BLOCK
(D126,C129)
RECTIFIER &
18
SMOOTING BLOCK
(D129,C134)
17
RECTIFIER &
8
16
SMOOTING BLOCK
D125,C127,L123,C128
RECTIFIER &
15
SMOOTING BLOCK
(D124,C124,L122,C126)
14
RECTIFIER &
SMOOTING BLOCK
10 13
(D121,D122,C121,
C122,L121,C123)
PHOTO COUPLER FEED-BACK
(IC102)
BL OCK
R121,R122,
C120,R123.
!
R124.R125
ERROR
R126)
AMP
(IC103)
3-52
TO TIMER
(P102)
FD(+)
FD(-)
-29VA
24V REG BLOCK
(IC151,C152)
TO MAIN
12V REG BLOCK (P101)
(IC152,IC153,ZD152)
3.7VA
3.1VA
6.5VA
12VA
30VA
24VA
-8VA