Daewoo DSB-070L, Service Manual

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36
Power Supply(1)
DESCRIPTION
DC Power Supply in circuit needs +12V and +5V. +12V is used for Compressor Driving Relay, Triac Driving
Photo Triac, Buzzer Driving Swing, Sweep Motor. AC voltage of secondary Power Transformer is rectified by
Bridge Diode, and it is filtering by Main Condensor CE1.
Filtered DC voltage is about +18V, is reg12V DC by Regulator IC7812.
And it is reg5V DC by Regulator IC7805.
VAR is serge filter and CC1, CC2, CC3 is Noise filter.
AC 220V
CL1
275V
104K
VAR
FUSE1
3.15A
POWER TRANS
D2
CC1 CE1
D3
D1
D4
104
+
35V
1000
µ
F
IC2
7812
VI VO
G
IC3
7805
VI VO
G
+
25V
470
µ
F
CC2 CC3 CE3 CE2
104
+
16V
100
µ
F
104
12V 5V
Oscillator(2)
19
OSC
CC13
104
5V
8M
20
V
DD
-10%
V
SS
+10%
Fig 2-1
DESCRIPTION
Oscillatory Frequency drive Micom, it is made up 8MHz resonator oscillatory Freqency.
Ocillatory wave is as following Fig 2-1.