Filter
Top Products
23
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, Stepping 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 regulated +12V DC by Regulator IC7812.
And it is regulated +5V 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
1000µF
IC2
7812
VI VO
G
IC3
7805
VI VO
G
+
25V
470µF
CC2 CC3 CE3CE2
104
+
16V
100µF
104
12V 5V
Oscillator(2)
19
OSC
CC13
104
5V
8M
20
VDD-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.
4
PCB DRIVING DESCRIPTION