Circuit Descriptions; Power Circuit - Samsung SR-L676EV Service Manual

6. Circuit Descriptions

1. Power cir cuit
WHT GRY
BLK RED GRN
+12
The input AC voltage of DC-trans secondary registers 15V at CON1 between ~ . The rectified
voltage passed through BD05 ~ 08 becomes DC 12V through voltage regulator MC7812(IC02). The
power(DC12V) is supplied to the relay operation power block. Then, DC 5V is genetatel and supplied
to the power around micom and sensor detector through 7805(IC03).
The rectified voltage passed through BD01~04 passes through 7812(IC01). Then, DC12V is supplied to
LED display and switch detector.
18
CON1
1
BLK
3
5
BLU
7
L V T
Voltage
(DC 12V)
Vcc (DC 5V)
V12 (DC 12V)
BD05-08
1N4004 X 4
1
FUSE2
250V 0.5A
C103
3
BD01-04
1N4004 X 4
5
7
Circuit used
Relay Operation
Power around MICOM & Sensor Detector
LED Display & S/W Detector
HEAT-STICK HEAT-STICK
7812 7805
(MC7805) (MC7805AC)
IC02 + IC03
IC03
HEAT-STICK
7812
(MC7812)
+ ICO1 +
C
C
C106
1000uF 470uF
35V 25V
Samsung Electronics
(DC12V)
+12
104
Vcc
(DC5V)
C109
+
104
C107
470uF
25V
V12
(DC12V)