Power Unit Circuit; Cpu Unit Circuit - Sharp R-450B Service Manual

1
A
B
A 3
AC230-240V
50Hz
C
D
TURNTABLE
MOTOR
OVEN LAMP A 1
FAN
E
MOTOR
N.O.
MICRO
COM
AC
F
G
H
1
2
3
D1-D4
11ES1
T1
1 4
D1
D3
d
D4
D2
3 6
a b
VR
c
RY1
D7
RY2
D8
NOTE : IF NOT SPECIFIED, 1/4w 5%
: IF NOT SPECIFIED, 1SS270A
Figure S-2. Power unit Circuit
2
3
4
Q2 2SB1238
R4 27
VR
R5 4.7k
D5 D6
+
–
R3
R2
510 1w 390 1/2w
SP1
R6 3.3k
+
C5
10 /35v
–
Q3 DTD143ES
4
15
6
5
CPU UNIT
WH-1
2 PIN C10
LED
1 PIN C 9
(2-pin harness)
C 1 C 1
VA
C 2 C 2
GND
C 3 C 3
VC
C 4
C 4
INT
C 5
C 5
BUZZER
C 6
C 6
TURNTABLE
MOTOR
OVEN LAMP
FAN
MOTOR
C 7 C 7
MICRO
C 8 C 8
N.C.
C 9
C12
DOOR
SWITCH
(9-pin harness)
B 1
DOOR
SWITCH
B 2
5 6
R-450B
A
B
C
D
E
F
G
H