Sharp R-82STM (serv.man2) Service Manual ▷ View online
82STM -16
MICROWAVE MEASUREMENT
After any repair, the microwve oven must be checked
for microwave leakage to ensure continued safe
operation. BS EN 60335-2-25 specifies that the
maximum permitted leakage with a load of 275ml is 50
W/m
for microwave leakage to ensure continued safe
operation. BS EN 60335-2-25 specifies that the
maximum permitted leakage with a load of 275ml is 50
W/m
2
(equivalent to 5mW/cm
2
) at a distance of 5cm
from the oven.
PREPARATION
The following items are required to carry out this test:-
1.
1.
A low form of 600ml beaker made from
electrically non-conductive material, such as
glass or plastic, with an inside diameter of
approximately 8.5cm. This must contain 275
electrically non-conductive material, such as
glass or plastic, with an inside diameter of
approximately 8.5cm. This must contain 275
±
15ml of water, at an initial temperature of 20
±
2
°C.
2.
A leakage detector which has been calibrated
within the preceeding 12 months to a stand
whose accuracy can be traced to National
Physical Laboratory Standards.
within the preceeding 12 months to a stand
whose accuracy can be traced to National
Physical Laboratory Standards.
Recommended instruments are:
Apollo "XI"
Celtec "A1000"
Celtec "A1000"
Before commencing the test, check the leakage
detector is functioning and adjusted according to the
manufacturer's instructions, and any spacers are fitted
to ensure that measurement is taken 5cm from the
surface of the oven.
detector is functioning and adjusted according to the
manufacturer's instructions, and any spacers are fitted
to ensure that measurement is taken 5cm from the
surface of the oven.
Dotted line indicaes path taken by the leakage detector
Whilst the maximum leakage permitted in BS EN 60335-2-25 is 50 W/m
2
(equivalent to 5mW/cm
2
), it is not
normal to detect anything signifcant, and therefore any detected leakage should be investigated.
PROCEDURE
1.
Place the beaker containing the water load
inthe oven cavity at the centre of the
turntable. The placing of this standard load in
the oven is important, not only to protect the
oven, but also to ensure that any leakage it is
not disguised by too large a load absorbing
the energy.
inthe oven cavity at the centre of the
turntable. The placing of this standard load in
the oven is important, not only to protect the
oven, but also to ensure that any leakage it is
not disguised by too large a load absorbing
the energy.
2.
Close the oven door, and with the power level
set to FULL, turn the oven ON with the timer
set for a few minutes operation. Should the
water begin to boil before the test has benn
completed, it should be replaced.
set to FULL, turn the oven ON with the timer
set for a few minutes operation. Should the
water begin to boil before the test has benn
completed, it should be replaced.
3.
As shown in the diagram below, move the
probe slowly (not faster than 2.5cm/sec);-
probe slowly (not faster than 2.5cm/sec);-
a)
around the edge of the door following the gap
b)
across the face of the door
c)
across any vents in the oven's sides, rear or
top
top
82STM - 17
SCHEMATIC DIAGRAM
Figure 0-1. Shematic Diagram
125/-20 C
C
150/130
C1
C3
STOR
THERMI-
N
0.22 /250V
G-Y/15
/15
/15
FILTER
NOISE
NOISE SUPPRESSION COIL
LIVE
NEUTRAL
*
H.V. RECTIFIER
RECTIFIER
*
ASYMMETRIC
BRN
BLU
TRANSFORMER
*
POWER
*
MAGNETRON
EARTH
DIAGRAM
SCHEMATIC
RY2
RY4
RY3
N.O
N.O
COM
N.O
COM
COM
FM
OL
TM
T
CM
UNIT
CONTROL
FUSE
F8A
F8A
STOP
SWITCH
SWITCH
B1
B2
T/C TRANSFORMER
OVEN LAMP
CONVECTION
FAN MOTOR
FAN MOTOR
TURNTABLE
MOTOR
A1
E1
E3
E5
E7
A3
FUSE 15A
1.16 F
AC2100V
CAPACITOR
FAN
MOTOR
MODEL: R-82STM
230-240V 50Hz
CONV.THERMAL CUT-OUT
MONITORED
SWITCH
LATCH
RY6
RY5
RY1
D3
D1
A5
CUT-OUT
THERMAL
OVEN
CUT-OUT
THERMAL
MG
GRILL HEATER (TOP)
BOTTOM HEATER
NC
MONITOR
SWITCH
SWITCH
680K/0.5W
4700p/250V
4700p/250V
10M/0.5W
L
sw3
sw1
sw2
* INDICATES PARTS WITH POTENTIALS OVER 240V
*
82STM -
1
8
WIRING DIAGRAM
Figure S-1. Pictorial Diagram
BLK
BLU
D
E
R
RED
T
H
W
T
H
W
RED
K
L
B
WHT
WHT
WHT
WHT
WHT
U
L
B
BLU
BLU
BLU
K
L
B
BLK
BRN
BRN
R
Y
G
Y
G
R
T
H
W
WHT
U
L
B
BLU
ORG
ORG
ORG
ORG
BLK
BLK
RED
RED
ORG
ORG
ORG
K
L
B
BLK
U
L
B
BLU
T
H
W
WHT
GRY
GRY
GRY
GRY
GRY
GRY
T
H
W
WHT
1
GRN
2
RED
OVEN
N
R
B
U
L
B
CAPACITOR
VOLTAGE
HIGH
SHORT
PROTECTOR
RECTIFIER
HV WIRE B
HV WIRE A
POWER TRANSFORMER
MAGNETRON
STOP
TOP HEATER
MAGNETRON
THERMAL
THERMAL
CUT-OUT
CUT-OUT
TOUCH CONTROL
HIGH VOLTAGE COMPONENTS
SWITCH
MONITORED
LATCH
MONITOR
SWITCH
SWITCH
MOTOR
CONVECTION
THERMISTOR
UNIT
FILTER
NOISE
MAINS SUPPLY CORD
FAN MOTOR
OVEN LAMP
TURNTABLE
MOTOR
BOTTOM HEATER
TRANSFORMER
LOW VOLTAGE
RED
GRN
K
T
H
W
U
L
L
G
O
D
D
E
E
N
N
R
R
R
R
R
B
B
B
B
2 3 4 5 6 7
7
6
5
4
3
2
1
1
BLK
BLK
2
1
3
COM
NO
NO
COM
COM
NO
NO
COM
RY3
RY1
RY2
RY4
CN-A
CN-E
CN-B
CN-C
BLU
BRN
G/Y
LIVE
NEUTRAL
EARTH
D
E
R
D
E
R
CONV.
CUT-OUT
THERMAL
82STM -
1
9
Figure S-2. Control Panel Circuit
WIRING DIAGRAM
+
–
+
–
+
–
+
–
E 1
E 3
WH-A
E 5
E 7
T1
AC230-240 V
50Hz
CONVECTION
FAN MOTOR
OVEN LAMP
TURNTABLE
MOTOR
LOWER
HEATER
UPPER
HEATER
HIGH
VOLTAGE
TRANSFORMER
FAN MOTOR
DOOR SWITCH
OVEN THERMISTER
510 1w
R1
510 1w
R2
D1
RY5
RY6
RY1
RY4
RY3
RY2
VRS1
a
b
c
d
C1 0.1
µ
/50v
C2 470
µ
/50v
C20 10
µ
/35v
IC1 IZA930DR
C21
0.1
µ/50v
C6 10
µ
/35v
C7 0.1
µ
/50v
0.1
µ
/50v
C3
C4
C5
D5
D6
Q2
DTA123ES
Q1
KRA101M
Q40
KRA101M
Q25
KRA101M
Q21
KRA101M
Q20
KRC243M
Q24
KRA101M
Q23
KRA101M
Q22
KRA101M
Q6
2SB1238
Q26
KRA101M
D28
11ES1
Q3
2SB1238
(J9)
(J7)
FLUORESCENT DISPLAY TUBE
CONTROL UNIT
KEY UNIT
(J3)
(J8)
(J6)
(J2)
SP1
(J1)
D24
D25
D20
D30
D23
D22
D21
R12 1.5k
ZD4 HZ20-1
R40 3.3k
R8 15k
R10 15k
R9 15k
R21 130 1w
R20 130 1w
R3 4.7k
R30 15k
R81 360F
G11
G7
G2
10 min.
1 min.
CAKE
10 sec.
PIZZA
LESS
STOP/
CLEAR
RICE/
PASTA
OVEN
CHIPS
MIXED
GRILL
AUTO
COOK
START
CLOCK
AUTO
MINUTE
AUTO
DEFROST
CHICKEN
PTNS
BREAKFAST
BAKED
POTATOES
AUTO
START
DUAL
CONVECTION
GRILL
CONVECTION
TEMPERATURE
MICROWAVE
POWER
LEVEL
G5. 9
R69 4.7k
R68 4.7k
R70 4.7k
R71 4.7k
R72 4.7k
R73 4.7k
R74 4.7k
R83 15k
R31 4.7k
R82 12kF
CR60
G12
G10
G8
G6
G4
G1
G3
R80 300kF
NOTE
: IF NOT SPECIFIED 1/4w
± 5%
: IF NOT SPECIFIED 1SS270A
: IF NOT SPECIFIED 0.01
µF/16v ± 5%
C30
CF1
4MHz
C80
R5 16
R6 4.7k
R4 4.7k
ZD1 HZ5C2
ZD2 HZ4A2
LD1 LD2
LD3 LD4 LD5
A 3
A 1
D 3
B 1
B 2
C 1
C 3
D 1
A 5
NO
COM
NO
COM
NO
COM
SEG10
C1
5
10
15
20
25
30
55
60
65
70
75
80
35
45
85
90
95
50
VL1
C2
VL2
VL3
COM0
COM1
P73
P72
P71
P70
RESET
XCIN
XCOUT
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
P17
P16
COM2
COM3
AVSS
VREF
VCC
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P57
P56
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
P56
P55
P54
P53
P52
P51
P50
P47
P46
P45
P44
P41
P40
P77
P76
P75
P74
P40
P77
P76
P75
P74
INT1
INT0
INT0
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
P10
P11
P12
P13
P14
P15
P11
P12
P13
P14
P15
MORE
GRILL
TIMER
Info
Kg / Lb
Kg
• Lb
g
• oz
MICRO
Lbs Kg Oz AUTO
COOK nfo
%
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