Smps Block Diagram - LG RH1777 Service Manual

4. SMPS Block Diagram

FUSE
(F101)
BR BL
(BK)(WH)
TH01
+
NOISE FILTER
BLOCK
(C101,L102,
BRIDGE
C102)
DIODE
(BD101)
DRIVE & S/W BLOCK
(IC101, D102, R105,
C107, C108,
C109 , ZD101,ZD103 )
+
Y-CAP Y-CAP
C112 C113
3-21
TRANS
RECTIFIER &
SMOOTING BLOCK
RECTIFIER &
SMOOTING BLOCK
RECTIFIER &
SMOOTING BLOCK
SNUBBER
BLOCK
RECTIFIER &
(D101,C105
T101
SMOOTING BLOCK
C106,R104)
RECTIFIER &
SMOOTING BLOCK
RECTIFIER &
SMOOTING BLOCK
RECTIFIER &
SMOOTING BLOCK
PHOTO COUPER
FEED-BACD
(IC102)
BLOCK
R141,R142,
C143,R143.
R144.R145
ERROR
R146)
AMP
(IC103)
3-22
TO MAIN
FD(+)
FD(-)
-28VA
13.5VA
33VA
3.8VA
5.3VA
PWR CTL'H'
TO LOADER
(P1D01)
12V REG
12V
5.0V
5V REG
R160
FAN Vcc