Daewoo ROOM AIR CONDITIONER DWC-121R - Manual (Page 22)

21
Power Supply(1)
DESCRIPTION
DC Power Supply in circuit needs +12V and +5V. +12V is used for Compressor Driving Relay, Fan Motor
Driving Relay, Buzzer Driving, Swing Motor Driving Relay and LED Display. AC voltage of secondary Power
Transformer is rectified by 4 Diode, and it is filtering by Main Condensor C2.
Filtered DC voltage is about +17V is regulated +12V DC by Regulator IC7812.
And it is regulated +5V DC by Regulator IC7805.
VAR1 is surge filter and C4, C6 is Noise filter.
AC 220V C1
335
VAR1
POWER
TRANS
+
C2
2200/35V
+
C7
100/16V
2
1 3
C6
0.1
+
C5
470/25V C4
0.1 C3
104
7812
2
1 3
7805