Sharp R-23AM (serv.man3) Service Manual ▷ View online
35
R - 2 2 A T
R-23AM
R - 2 4 A T
R-23AM
R - 2 4 A T
MICROWAVE MEASUREMENT
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
Dotted line indicates the path taken by the leakage
detector.
detector.
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.
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”
36
R - 2 2 A T
R-23AM
R - 2 4 A T
R-23AM
R - 2 4 A T
Figure O-2 Oven Schematic-IDLE Condition (Door opened condition)
SCHEMATIC
NOTE: CONDITION OF OVEN
1. POWER SUPPLY CONNECTED AND/OR 1MINUTE
1. POWER SUPPLY CONNECTED AND/OR 1MINUTE
AFTER DOOR CLOSED OR COOK OFF.
2. : APPEAR ON DISPLAY.
NOTE:
Indicates components with potential above 250 V.
Figure O-1 Oven Schematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. FOR 1MINUTE AFTER DOOR CLOSED.
2. : APPEAR ON DISPLAY.
1. FOR 1MINUTE AFTER DOOR CLOSED.
2. : APPEAR ON DISPLAY.
F1 : FUSE F13A
BLU
NEUTRAL
LIVE
GRN/YLW
BRN
NOISE FILTER
SW1:
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
SW4:
MONITOR
SWITCH
R1:
MONITOR
RESISTOR
4.3
Ω
/20W
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 680 k
Ω
1/2W
DISCHARGE RESISTOR 10 M
Ω
1/2W
LINE CROSS CAPACITOR 0.22
µ
F/ AC250V
LINE CROSS CAPACITOR
10000 pF/ AC250V
LINE CROSS CAPACITOR
10000 pF/ AC250V
A7
A5
TF3:
BLOWER MORTOR
TEMP. FUSE 120C
°
TF4:
OVEN TEMP.
FUSE 120C
°
F2:
FUSE
F6.3A
SW2: 2ND LATCH SWITCH
F4: FUSE M8A
A1
TF1: MAGNETRON (MG1)
TEMP. FUSE 150
°
C
TF2:
MAGNETRON (MG2)
TEMP. FUSE 150
MAGNETRON (MG2)
TEMP. FUSE 150
°
C
OVEN LAMP
BLOWER MOTOR
A3
CONTROL
UNIT
UNIT
RY3 (R-22AT/24AT)
RY2 (R-23AM)
RY4 (R-22AT/24AT)
RY3 (R-23AM)
B1
SW3:
3RD LATCH SWITCH
3RD LATCH SWITCH
OVEN
THERMISTER (1)
OVEN
THERMISTER (2)
SW5:
STOP
SWITCH
STOP
SWITCH
TAB3
TAB2
TAB1
TAB4
T1: HIGH VOLTAGE
TRANSFORMER
230V - 240V~50Hz
H. V. RECTIFIER
C1: H.V. CAPACITOR
MG1: MAGNETRON
F3: FUSE M8A
SM
UPPER
STIRRER MOTOR
LOWER
STIRRER MOTOR
SM
BM
B2
B3
H1
H3
MAGNETRON THERMISTER
H. V. RECTIFIER
C2: H.V. CAPACITOR
MG2: MAGNETRON
H.V.
FUSE
0.6 A/ 5 kV (R-22AT)
FUSE
0.6 A/ 5 kV (R-22AT)
0.75 A/ 5 kV R-24AT
R-23AM
T2: HIGH VOLTAGE
TRANSFORMER
L
BLK
WHT
N
OL
RY1
EARTH
H.V.
FUSE
0.6 A/ 5 kV (R-22AT)
FUSE
0.6 A/ 5 kV (R-22AT)
0.75 A/ 5 kV R-24AT
R-23AM
F1 : FUSE F13A
NOISE FILTER
SW1:
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
SW4:
MONITOR
SWITCH
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 680 k
Ω
1/2W
DISCHARGE RESISTOR 10 M
Ω
1/2W
LINE CROSS CAPACITOR 0.22
µ
F/ AC250V
LINE CROSS CAPACITOR
10000 pF/ AC250V
LINE CROSS CAPACITOR
10000 pF/ AC250V
A7
A5
TF3:
BLOWER MORTOR
TEMP. FUSE 120C
°
TF4:
OVEN TEMP.
FUSE 120C
°
F2:
FUSE
F6.3A
SW2: 2ND LATCH SWITCH
F4: FUSE M8A
A1
TF1: MAGNETRON (MG1)
TEMP. FUSE 150
°
C
TF2:
MAGNETRON (MG2)
TEMP. FUSE 150
MAGNETRON (MG2)
TEMP. FUSE 150
°
C
OVEN LAMP
BLOWER MOTOR
A3
CONTROL
UNIT
UNIT
RY3 (R-22AT/24AT)
RY2 (R-23AM)
RY4 (R-22AT/24AT)
RY3 (R-23AM)
B1
SW3:
3RD LATCH SWITCH
3RD LATCH SWITCH
OVEN
THERMISTER (1)
OVEN
THERMISTER (2)
SW5:
STOP
SWITCH
STOP
SWITCH
TAB3
TAB2
TAB1
TAB4
T1: HIGH VOLTAGE
TRANSFORMER
H. V. RECTIFIER
C1: H.V. CAPACITOR
MG1: MAGNETRON
F3: FUSE M8A
SM
UPPER
STIRRER MOTOR
LOWER
STIRRER MOTOR
SM
BM
RY1
B2
B3
H1
H3
MAGNETRON THERMISTER
H. V. RECTIFIER
C2: H.V. CAPACITOR
MG2: MAGNETRON
T2: HIGH VOLTAGE
TRANSFORMER
L
BLK
WHT
N
OL
BLU
NEUTRAL
LIVE
GRN/YLW
BRN
230V - 240V~50Hz
EARTH
H.V.
FUSE
0.6 A/ 5 kV (R-22AT)
FUSE
0.6 A/ 5 kV (R-22AT)
0.75 A/ 5 kV R-24AT
R-23AM
H.V.
FUSE
0.6 A/ 5 kV (R-22AT)
FUSE
0.6 A/ 5 kV (R-22AT)
0.75 A/ 5 kV R-24AT
R-23AM
R1:
MONITOR
RESISTOR
4.3
Ω
/20W
37
R - 2 2 A T
R-23AM
R - 2 4 A T
R-23AM
R - 2 4 A T
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. MANUAL/ REPEAT KEY TOUCHED [R-22AT/24AT].
3. COOKING TIME PROGREMMED.
1. DOOR CLOSED.
2. MANUAL/ REPEAT KEY TOUCHED [R-22AT/24AT].
3. COOKING TIME PROGREMMED.
4. START PAD TOUCHED.
Figure O-3 Oven Schematic-Cooking Condition
F1 : FUSE F13A
NOISE FILTER
SW1:
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
1ST LATCH SWITCH
(PRIMARY INTERLOCK SWITCH)
SW4:
MONITOR
SWITCH
NOISE SUPPRESSION COIL
DISCHARGE RESISTOR 680 k
Ω
1/2W
DISCHARGE RESISTOR 10 M
Ω
1/2W
LINE CROSS CAPACITOR 0.22
µ
F/ AC250V
LINE CROSS CAPACITOR
10000 pF/ AC250V
LINE CROSS CAPACITOR
10000 pF/ AC250V
A7
A5
TF3:
BLOWER MORTOR
TEMP. FUSE 120C
°
TF4:
OVEN TEMP.
FUSE 120C
°
F2:
FUSE
F6.3A
SW2: 2ND LATCH SWITCH
F4: FUSE M8A
A1
TF1: MAGNETRON (1)
TEMP. FUSE 150
°
C
TF2:
MAGNETRON (2)
TEMP. FUSE 150
MAGNETRON (2)
TEMP. FUSE 150
°
C
OVEN LAMP
BLOWER MOTOR
A3
CONTROL
UNIT
UNIT
RY3 (R-22AT/24AT)
RY2 (R-23AM)
RY4 (R-22AT/24AT)
RY3 (R-23AM)
B1
SW3:
3RD LATCH SWITCH
3RD LATCH SWITCH
OVEN
THERMISTER (1)
OVEN
THERMISTER (2)
SW5:
STOP
SWITCH
STOP
SWITCH
TAB3
TAB2
TAB1
TAB4
T1: HIGH VOLTAGE
TRANSFORMER
H. V. RECTIFIER
C1: H.V. CAPACITOR
MG1: MAGNETRON
F3: FUSE M8A
SM
UPPER
STIRRER MOTOR
LOWER
STIRRER MOTOR
SM
BM
RY1
B2
B3
H1
H3
MAGNETRON THERMISTER
H. V. RECTIFIER
C2: H.V. CAPACITOR
MG2: MAGNETRON
T2: HIGH VOLTAGE
TRANSFORMER
L
BLK
WHT
N
OL
BLU
NEUTRAL
LIVE
GRN/YLW
BRN
230V - 240V~50Hz
EARTH
H.V.
FUSE
0.6 A/ 5 kV (R-22AT)
FUSE
0.6 A/ 5 kV (R-22AT)
0.75 A/ 5 kV R-24AT
R-23AM
H.V.
FUSE
0.6 A/ 5 kV (R-22AT)
FUSE
0.6 A/ 5 kV (R-22AT)
0.75 A/ 5 kV R-24AT
R-23AM
R1:
MONITOR
RESISTOR
4.3
Ω
/20W
NOTE:
Indicates components with potential above 250 V.
38
R - 2 2 A T
R-23AM
R - 2 4 A T
R-23AM
R - 2 4 A T
6
4
5
1
2
3
6
4
5
1
2
3
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
Figure S-1. Pictrorial Diagram
BRN
NOISE FILTER
BLU
NL
F1:
FUSE 13A
SW5 : STOP
SWITCH
1 RED
3 WHT
2
TOUCH CONTROL PANEL
(R-22AT, R-24AT)
IC
CN-H
CN-B
CT1
TAB1
RY-3
TAB2
RY-1
CN-A
T1
CT2
RY-4
TAB4
CN-H
TAB2
TAB1
CN-A
4
1 BLK
5 WHT
3 PNK
2
6
7 RED
BRN
TAB3
TAB4
NO
COM.
BRN
ORG
PNK
COM.
NO
SW3 :
3RD LATCH
SWITCH
WHT
GRN
GRN
ORG
WHT
GRY
COM.
NO
SW1:
1ST LATCH
SWITCH
(Cabinet side)
COM.
NO
COM.
NC
WHT
GRY
HIGH VOLTAGE COMPONENTS
MG1 :
MAGNETRON
(Upper)
White case
(Cabinet side)
Black tape
MG2 :
MAGNETRON
(Lower)
T1 :
HIGH VOLTAGE
TRANSFORMER
H.V. FUSE
H.V. FUSE
H. V. RECTIFIER
C2 : HIGH VOLTAGE
CAPACITOR
YLW
WHT
OL :
OVEN LAMP
&
SOCKET
PNK
OVEN
THERMISTOR (1)
TF2:
MAGNETRON
TEMP. FUSE
150˚C
F2 :
FUSE
F6.3A
G/Y
POWER
SUPPLY
CORD
EARTH
NEUTRAL
LIVE
WHT
PNK
GRY
SW4 :
MONITOR
SWITCH
BM :BLOWER
MOTOR
CN-D
BLK
ORG
RED
1 GRN
3 BLK
2 ORG
CN-B
GRN
GRN
WHT
SW2:
2ND LATCH
SWITCH
(Oven side)
BLK
RED
ORG
ORG
ORG
WHT
WHT
SM:
STIRRER
MOTOR
(Upper)
YLW
PNK
WHT
GRY
BLK
GRY
PNK
ORG
PNK
T2 :
HIGH VOLTAGE
TRANSFORMER
C1 : HIGH VOLTAGE
CAPACITOR
H. V. RECTIFIER
BLK
MAGNETRON
THERMISTOR
(Door side)
PNK
PNK
WHT
WHT
BLK
PNK
GRY
PNK
PNK
WHT
W
H
T
W
H
T
W
H
T
R
E
D
B
L
K
R1 : MONITOR RESISTOR
F3 : FUSE M8A
(Cabinet side)
BRN
BRN
F4 : FUSE M8A
(Oven side)
TOUCH CONTROL PANEL
(R-23AM)
CN-J
IC
CN-H
CN-B
CT1
TAB2
RY-2
TAB1
RY-1
CN-A
T
CT2
RY-3
TAB3
TAB4
CN-E
TAB3
1
2
3
RED
WHT
OVEN THERMISTOR (2)
Blue
case
BLK
TF1:
MAGNETRON
TEMP. FUSE
150˚C
TF3:
MAGNETRON
TEMP. FUSE
120˚C
TF4:
OVEN TEMP.
FUSE 120˚C
RED
RED
1
2
RED
WHT
1
2
GRN
BLK
WHT
BLK
SM:
STIRRER
MOTOR
(Lower)
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