R-874 (serv.man4). Schematic and pictorial diagrams, power and CPU unit circuit, PWB's — Sharp Home Appliance Service Manual (repair manual). Page 7

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R-874M - 37
Figure S-2. Power Unit Circuit
  POWER UNIT CIRCUIT DIAGRAM
E 1
WH1-4
WH1-3
WH1-6
WH1-9
WH1-5
WH1-8
WH1-7
WH1-1
WH1-2
WH1-n
WH1-10
WH1-12
WH1-13
WH1-14
WH1-15
WH1-11
C 1
E 3
E 5
E 7
T1
AC230-240V
50Hz
FAN MOTOR
OVEN
THERMISTOR
GND
GND
R3 510 1w
R6 130 1w
Q2
2SB1238
Q3
KRC243M
R4 510 1w
D10
S1NB10
RY5
a
b
c
d
C1
VRS1
(J1)
(J2)
D5
RY6
D6
RY7
D7
RY1
D1
R2
1.5k
ZD2
HZ20-1
RY4
D4
RY3
D3
RY2
D2
10G471K
C3
C2 1000
µ
/35v
C5
10
µ
/35v
C4 10
µ
/35v
R5 3.3k
SP1
VC
BUZZER
VR
INT
POWER
CONTROL
STOP
SWITCH
NC
CONVECTION
MOTOR
BOTTOM
HEATING
ELEMENT
GRILL
HEATING
ELEMENT
HIGH VOLTAGE
TRANSFORMER
STOP
SWITCH
OVEN LAMP
TURNTABLE
MOTOR
DOOR OPEN
CONTACT 
A 1
A 3
A 5
A 7
A 9 
N O
N O
N O
N O
COM
COM
COM
COM
B 2
B 1
NOTE 1.
NOTE 2.
+
+
+
C 3
: IF NOT SPECIFIED, 1/4W 
± 5% 
15P WIRE HARNESS 
: IF NOT SPECIFIED, 0.1
µF / 50V 
: IF NOT SPECIFIED, 1SS270A
R-874 S/MANUAL
11/7/01, 10:59 am
37
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