Sharp R-963 (serv.man2) Service Manual ▷ View online
R-953/963M - 31
MICROWAVE MEASUREMENT
After any repair, the microwave 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 275 ml is 50 W/m
microwave leakage to ensure continued safe operation.
BS EN 60335-2-25 specifies that the maximum permitted
leakage with a load of 275 ml is 50 W/m
2
(equivalent to 5
mW/cm
2
)
at a distance of 5 cm from the oven.
PREPARATION
The following items are required to carry out this test:-
1. A low form of 600 ml beaker made from an electrically
1. A low form of 600 ml beaker made from an electrically
non-conductive material, such as glass or plastic, with
an inside diameter of approximately 8.5 cm. This must
contain 275
an inside diameter of approximately 8.5 cm. This must
contain 275
±
15 ml of water, at an initial temperature
of 20
±
2˚C.
2. A leakage detector which has been calibrated within
the preceding 12 months to a stand whose accuracy
can be traced to National Physical Laboratory Stand-
ards.
can be traced to National Physical Laboratory Stand-
ards.
Recommended instruments are:
Apollo "XI"
Celtec "A100"
Celtec "A100"
Before commencing the test, check that 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.
PROCEDURE
1. Place the beaker containing the water load in the 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 energy.
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 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 been completed, it should be
replaced.
minutes operation. Should the water begin to boil
before the test has been completed, it should be
replaced.
3. As shown in the diagram below, move the probe slowly
(not faster than 2.5 cm/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
b) across the face of the door
c) across any vents in the oven's sides, rear or top
Whilst the maximum leakage permitted in BS EN 60335-2-25 is 50 W/m
2
(equivalent to 5 mW/cm
2
), it is not normal
to detect any significant leakage, and therefore any detected leakage should be investigated.
Dotted line indicates the path taken by the leakage detec-
tor.
tor.
R-953/963M - 32
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR OPENED.
2. "ENERGY SAVED MODE" APPEARS ON DISPLAY.
1. DOOR OPENED.
2. "ENERGY SAVED MODE" APPEARS ON DISPLAY.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. PLUGGED IN OVEN.
3. NOTHING APPEARS ON DISPLAY.
1. DOOR CLOSED.
2. PLUGGED IN OVEN.
3. NOTHING APPEARS ON DISPLAY.
Figure O-1(a) Oven Schematic-OFF Condition right after the oven is plugged in.
Figure O-1(b) Oven Schematic-OFF Condition when the oven door is opened.
Note:
AC CORD CONNECTION
BRN :
AC CORD CONNECTION
BRN :
BROWN
BLU :
BLUE
G-Y :
GREEN AND YELLOW STRIPE
/15 :
SECTIONAL AREA OF 1.5mm
2
MIN.
" "
Indicates components with potential
above 250 V.
above 250 V.
OL
OVEN LAMP
CONVECTION MOTOR
DAMPER MOTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.16 F
AC2100V
CONTROL
UNIT
UNIT
A7
D3
D1
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E5
E7
E3
E1
A1
B2
B3
B4
C3
C1
B1
A5
STOP
SWITCH
SWITCH
DAMPER
SWITCH
SWITCH
MONITORED LATCH SWITCH
THERMISTOR
MAG.
THERMAL
CUT-OUT
CONV.
THERMAL
CUT-OUT
MONITOR
SWITCH
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
/250V
FUSE 20A
FUSE
F8A
NOISE
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.O.
N.C.
N.C.
N.O .
COM.
COM.
ASYMMETRIC
RECTIFIER
RECTIFIER
RY6
RY7
RY8
RY1
RY2
RY3
RY4
FM
F2
F1
F3
TTM
CM
DM
GRILL
THERMAL
CUT-OUT
AH SENSOR
(Only for R-963M)
OL
OVEN LAMP
CONVECTION MOTOR
DAMPER MOTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.16
µ
F
AC2100V
CONTROL
UNIT
UNIT
A7
D3
D1
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E5
E7
E3
E1
A1
B2
B3
B4
C3
C1
B1
A5
STOP
SWITCH
SWITCH
DAMPER
SWITCH
SWITCH
MONITORED LATCH SWITCH
THERMISTOR
MAG.
THERMAL
CUT-OUT
CONV.
THERMAL
CUT-OUT
GRILL
THERMAL
CUT-OUT
AH SENSOR
(Only for R-963M)
MONITOR
SWITCH
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
FUSE 20A
FUSE
F8A
NOISE
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.O.
N.C.
N.C.
N.O .
COM.
COM.
ASYMMETRIC
RECTIFIER
RECTIFIER
RY6
RY7
RY8
RY1
RY2
RY3
RY4
FM
F2
F1
F3
TTM
CM
DM
SCHEMATIC DIAGRAMS
R-953/963M - 33
Figure O-2 Oven Schematic-Microwave cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. STRAT KEY TOUCHED.
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. STRAT KEY TOUCHED.
Figure O-1(c) Oven Schematic-OFF Condition after the oven door is closed.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. " . O" APPEARS ON DISPLAY.
1. DOOR CLOSED.
2. " . O" APPEARS ON DISPLAY.
OL
OVEN LAMP
CONVECTION MOTOR
DAMPER MOTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.16 F
AC2100V
CONTROL
UNIT
UNIT
A7
D3
D1
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E5
E7
E3
E1
A1
B2
B3
B4
C3
C1
B1
A5
STOP
SWITCH
SWITCH
DAMPER
SWITCH
SWITCH
MONITORED LATCH SWITCH
THERMISTOR
MAG.
THERMAL
CUT-OUT
CONV.
THERMAL
CUT-OUT
MONITOR
SWITCH
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
/250V
FUSE 20A
FUSE
F8A
NOISE
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.O.
N.C.
N.C.
N.O .
COM.
COM.
ASYMMETRIC
RECTIFIER
RECTIFIER
RY6
RY7
RY8
RY1
RY2
RY3
RY4
FM
F2
F1
F3
TTM
CM
DM
GRILL
THERMAL
CUT-OUT
AH SENSOR
(Only for R-963M)
OL
OVEN LAMP
CONVECTION MOTOR
DAMPER MOTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.16 F
AC2100V
CONTROL
UNIT
UNIT
A7
D3
D1
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E5
E7
E3
E1
A1
B2
B3
B4
C3
C1
B1
A5
STOP
SWITCH
SWITCH
DAMPER
SWITCH
SWITCH
MONITORED LATCH SWITCH
THERMISTOR
MAG.
THERMAL
CUT-OUT
CONV.
THERMAL
CUT-OUT
MONITOR
SWITCH
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
/250V
FUSE 20A
FUSE
F8A
NOISE
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.O.
N.C.
N.C.
N.O .
COM.
COM.
ASYMMETRIC
RECTIFIER
RECTIFIER
RY6
RY7
RY8
RY1
RY2
RY3
RY4
FM
F2
F1
F3
TTM
CM
DM
GRILL
THERMAL
CUT-OUT
AH SENSOR
(Only for R-963M)
SCHEMATIC DIAGRAMS
R-953/963M - 34
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. CONVECTION TEMPERATURE SELECTED.
4. STRAT KEY TOUCHED.
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. CONVECTION TEMPERATURE SELECTED.
4. STRAT KEY TOUCHED.
Figure O-4 Oven Schematic-Convection Condition
NOTE: When the convection temperature 160 - 250 ˚C are selected, the grill heating
element will be energized as back up.
Figure O-3 Oven Schematic-Grill cooking Condition (TOP GRILL mode)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. GRILL MODE SELECTED.
4. STRAT KEY TOUCHED.
1. DOOR CLOSED.
2. COOKING TIME ENTERED.
3. GRILL MODE SELECTED.
4. STRAT KEY TOUCHED.
NOTE: The convection heater will be operational as back up until the oven cavity
temperature rises to 220 ˚C.
OL
OVEN LAMP
CONVECTION MOTOR
DAMPER MOTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.16 F
AC2100V
CONTROL
UNIT
UNIT
A7
D3
D1
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E5
E7
E3
E1
A1
B2
B3
B4
C3
C1
B1
A5
STOP
SWITCH
SWITCH
DAMPER
SWITCH
SWITCH
MONITORED LATCH SWITCH
THERMISTOR
MAG.
THERMAL
CUT-OUT
CONV.
THERMAL
CUT-OUT
MONITOR
SWITCH
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
/250V
FUSE 20A
FUSE
F8A
NOISE
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.O.
N.C.
N.C.
N.O .
COM.
COM.
ASYMMETRIC
RECTIFIER
RECTIFIER
RY6
RY7
RY8
RY1
RY2
RY3
RY4
FM
F2
F1
F3
TTM
CM
DM
GRILL
THERMAL
CUT-OUT
AH SENSOR
(Only for R-963M)
OL
OVEN LAMP
CONVECTION MOTOR
DAMPER MOTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
CONVECTION HEATING ELEMENT
H.V. RECTIFIER
MAGNETRON
HIGH VOLTAGE
TRANSFORMER
T/C TRANSFORMER
CAPACITOR
1.16 F
AC2100V
CONTROL
UNIT
UNIT
A7
D3
D1
RY5
COM.
COM.
COM.
N.O.
N.O.
COM.
N.O.
N.O.
A3
E5
E7
E3
E1
A1
B2
B3
B4
C3
C1
B1
A5
STOP
SWITCH
SWITCH
DAMPER
SWITCH
SWITCH
MONITORED LATCH SWITCH
THERMISTOR
MAG.
THERMAL
CUT-OUT
CONV.
THERMAL
CUT-OUT
MONITOR
SWITCH
SWITCH
4700p/ 250V
4700p/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
/250V
FUSE 20A
FUSE
F8A
NOISE
FILTER
L
N
230 - 240V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.O.
N.C.
N.C.
N.O .
COM.
COM.
ASYMMETRIC
RECTIFIER
RECTIFIER
RY6
RY7
RY8
RY1
RY2
RY3
RY4
FM
F2
F1
F3
TTM
CM
DM
GRILL
THERMAL
CUT-OUT
AH SENSOR
(Only for R-963M)
SCHEMATIC DIAGRAMS
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