Sharp R-23AM (serv.man3) Service Manual ▷ View online
27
R - 2 2 A T
R-23AM
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R-23AM
R - 2 4 A T
PAD ORDER
DISPLAY
PHONE
(Door close)
•
SET
•
SET
"NUMBER"
•
(within 2 sec.)
1
NUMBER 1
• 0
5
NUMBER 1
• 5
SET
"NUMBER"
•
SET
•
OTHER CHECKING AND CLEARING PROCE-
DURE FOR R-24AT / R-22AT
DURE FOR R-24AT / R-22AT
1) To check the contents of defrost.
" " : Flicker / : 0.1 sec BUZZER
PAD ORDER
DISPLAY
PHONE
(Door close)
•
CHECK
"NUMBER"
•
CHECK
DEFROST
1 0.20 DEF CHECK
(A)
DEF CHECK
1 20 POWER
(+ - B) 50%
2 0.13 DEF CHECK
(A)
DEF CHECK
2 30 POWER
(+ - B) 30%
DEF CHECK
3 5 POWER
20%
(Repeat)
CHECK
•
#1 : No key entry signal.
2) How to clear all counter(user and service) and total
cooking time and used time of filter.
PAD ORDER
DISPLAY
PHONE
(Door close)
•
SET
•
SET
"NUMBER" •
DOUBLE
"NUMBER" • DOUBLE
CHECK
"NUMBER" • DOUBLE
VOLUME
"NUMBER" • DOUBLE
SET
•
Memory No.
Cook Time
Output Power
1
5 sec.
100%
2
10 sec.
100%
3
20 sec.
100%
4
30 sec.
100%
5
40 sec.
100%
6
50 sec.
100%
7
1 min.
100%
8
1 min. 15 sec.
100%
9
1 min. 30 sec.
100%
10
2 min.
100%
11-20
0 sec.
3) How to enter the EEPROM pad.
Enter the EEPROM data into the memory pads, 3, 4,6, 8,
9, 11, 12, 13, 14, 15 and 20, referring to following example
and the table of EEPROM data.
Enter the EEPROM data into the memory pads, 3, 4,6, 8,
9, 11, 12, 13, 14, 15 and 20, referring to following example
and the table of EEPROM data.
Example: Suppose the EEPROM dada "2235" is entered
in to the memory pad 3.
" " : Flicker / : 0.1 sec BUZZER
PAD ORDER
DISPLAY
PHONE
(Door close)
•
CHECK
"NUMBER"
•
CHECK
CHECK
#2
8268
"CHECK"
(User"s Total Counts)
#1
VOLUME
#2
8268
"CHECK"
VOLUME
#2
8268
"CHECK"
DOUBLE
#3
xxxxxx "CHECK"
QUANTITY
(Total Counts of Service)
3
3030 "CHECK"
SET
0 "CHECK"
2, 2, 3, 5
2235 "CHECK"
x4
SET
2235 "CHECK"
CHECK
•
#1: Denotes the procedure for the servicer to disable clearing.
This procedure is instructed to service personnel only and
is excluded from the operation manual.
is excluded from the operation manual.
#2: If the IC-2 is exchanged, 0 should be indicated instead of
8268. But if the control unit is exchanged, 0 is not always
indicated.
indicated.
#3: Total counts of Service, 6 figures will be displayed.
Enter the memory information into the memory pads 1
~10 referring to above example. The memory information
are given below.
~10 referring to above example. The memory information
are given below.
Table of EEPROM data
Memory
pad
pad
Data
Contents
3
2 2 3 5 Hiher temperature limit setting of magn-
etron thermistor detection.
4
0 0 0 0 Constant setting of fan lock detection.
6
0 1 0 0 Time setting of fan lock detection.
8
3 2 0 0 Hiher temperature limit setting of ex-
haust air detection.
9
0 0 0 0 Constant setting of fan lock detection.
11
0 0 0 0 Constant setting of magnetron thermis-
tor detection.
12
0 0 0 0 Constant setting of magnetron thermis-
tor detection.
13
0 0 0 0 Constant setting of magnetron thermis-
tor detection.
14
0 0 0 0 Constant setting of magnetron thermis-
tor detection.
15
1 5
Interval time setting of magnetron ther-
mistor detection.
mistor detection.
20
0 0 0 0 Switching level setting of magnetron ther-
mistor detection.
28
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R-23AM
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R-23AM
R - 2 4 A T
1. Disconnect the oven from power supply.
2. Make sure that a definite “click” can be heard when the
2. Make sure that a definite “click” can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch leads to rise,
it is then possible to hear a “click” as the door switches
operate.)
closed position with one hand, then push the door open
button with the other, this causes the latch leads to rise,
it is then possible to hear a “click” as the door switches
operate.)
3. Visually check the door and cavity face plate for dam-
age (dents, cracks, signs of arcing etc.).
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist;
operating the oven.
Do not operate the oven if any of the following conditions
exist;
1. Door does not close firmly.
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any
of the following removal procedures:
of the following removal procedures:
OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL
To remove the components, procedure as follows.
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the screws from the rear and along side the
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the screws from the rear and along side the
edge of the outer case.
4. Slide the case back about 1 inch (3 cm) to free it from
the oven cavity.
5. Lift entire case from the unit.
6. DISCHARGE TWO HIGH VOLTAGE CAPACITORS
6. DISCHARGE TWO HIGH VOLTAGE CAPACITORS
BEFORE TOUCHING ANY OVEN COMPONENTS
OR WIRING.
OR WIRING.
7. Now, outer case is free.
N.B.; Step 1,2 and 9 form the basis of the 3D checks.
CAUTION:DISCHARGE TWO HIGH VOLTAGE CA-
PACITORS BEFORE TOUCHING ANY
OVEN COMPONENTS OR WIRING.
OVEN COMPONENTS OR WIRING.
To remove rear cabinet and power supply cord:
8. Remove the screws holding the rear cabinet to the
8. Remove the screws holding the rear cabinet to the
oven cavity and blower motor.
9. Remove the one (1) screws holding the switch mount-
ing angle to the rear cabinet and release the switch
mounting angle from the rear cabinet.
mounting angle from the rear cabinet.
10.Disconnect the power supply cord from the fuse holder.
11.Remove the one (1) screws holding the grounding wire
11.Remove the one (1) screws holding the grounding wire
of power supply cord to the oven cavity.
12.Remove the rear cabinet with the power supply cord
from the oven cavity.
13.Loosen the tab of the cord bushing, and remove the
power supply cord with the cord bushing from the rear
cabinet.
cabinet.
14.Remove the cord bushing from the power supply cord,
15.Now, the power supply cord and rear cabinet are free.
15.Now, the power supply cord and rear cabinet are free.
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
To prevent an electric shock, take the following
precautions.
1. Before wiring,
precautions.
1. Before wiring,
1) Disconnect the power supply cord.
2) Open the door and block it open.
3) Discharge the two high voltage capacitors and
2) Open the door and block it open.
3) Discharge the two high voltage capacitors and
wait for 60 seconds.
2. Don’t let the wire leads touch to the followiong parts;
1) High voltage parts:
Magnetron, High voltage transformer, High volt-
age capacitor, High voltage rectifier assembly and
High voltage wire.
age capacitor, High voltage rectifier assembly and
High voltage wire.
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer,
WARNING FOR WIRING
and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange,
Chassis support and other metallic plate.
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Blower fan blade, Blower fan motor, Switches,
Switch levers, Antenna motors and Sirrer anten-
nas.
Switch levers, Antenna motors and Sirrer anten-
nas.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector until its pin is locked
4. Insert the positive lock connector until its pin is locked
and make sure that the wire leads do not come off
even if the wire leads are pulled.
even if the wire leads are pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
HIGH VOLTAGE TRANSFORMER(S) REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
2. Remove the rear cabinet, too.
3. Disconnect wire lead(s) of high voltage transformer(s)
from magnetron(s).
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4. Remove the wire lead(s) of high voltage transformer(s)
from the wire holder.
5. Pull out the wire lead(s) of high voltage transformer(s)
from the tube.
6. Disconnect wire lead(s) of high voltage transformer(s)
from high voltage capacitor(s).
7. Disconnect the high voltage fuse(s) from high voltage
transformer(s).
8. Disconnect the main wire harness from high voltage
transformer(s).
9. Remove two (2) screws holding each power trans-
former to base plate.
10.Remove the high voltage transformer(s) from base
plate.
12.Now, high voltage transformer(s) are free.
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove the two (2) screws holding magnetron ex-
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove the two (2) screws holding magnetron ex-
haust duct to upper and lower waveguide.
4. Remove the magnetron exhaust duct from oven cavity.
5. Disconnect wire leads from magnetron(s ).
6. Disconnect magnetron thermistor from the connector
5. Disconnect wire leads from magnetron(s ).
6. Disconnect magnetron thermistor from the connector
of the stop switch harness.
7. Remove the one (1) screw holding the thermistor angle
to the upper magnetron.
8. Remove the four (4) screws holding each magnetron to
MAGNETRON(S) REMOVAL
upper and/or lower waveguide. When removing the
screws, hold the magnetron to prevent it from falling.
screws, hold the magnetron to prevent it from falling.
9. Remove the magnetron(s) from upper and/or lower
waveguide with care so magnetron antenna is not hit
by any metal object around antenna.
by any metal object around antenna.
10.Pull out the thermistor angle from the upper magnet-
ron.
11.Now, the magnetron(s) is (are) free.
CAUTION: WHEN REPLACING MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND
MOUNTING SCREWS ARE TIGHTENED
SECURELY.
MOUNTING SCREWS ARE TIGHTENED
SECURELY.
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove the upper magnetron from the upper waveguide
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove the upper magnetron from the upper waveguide
flange, referring to "MAGNETRON(S) REMOVAL".
4. Now, the upper magnetron with the magnetron ther-
mistor should be free.
5. Remove the thermistor angle from the upper magnet-
ron by pulling out.
6. Straighten the tab of the magnetron thermistor angle
holding the magnetron thermistor.
7. Remove the magnetron thermistor from the thermistor
angle.
8. Now, the magnetron thermistor is free.
Re-install
1. Install the magnetron thermistor to the thermistor angle
1. Install the magnetron thermistor to the thermistor angle
as shown in Figure C-1.
MAGNETRON THERMISTOR REPLACEMENT
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove two (2) screws holding earth side terminals of
2. Remove the rear cabinet, too.
3. Remove two (2) screws holding earth side terminals of
high voltage rectifier assembly to the capacitor holder
and oven cavity.
and oven cavity.
4. Disconnect all wire leads from the high voltage capacitor.
HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE AND HIGH VOLTAGE RECTIFIER
ASSEMBLY REMOVAL
5. Disconnect high voltage fuse(s) from the high voltage
transformer(s). Now, high voltage fuse(s) is(are) free.
6. Remove the three (3) screws holding the blower motor to
the top of oven cavity, the chassis support and air duct.
7. Disconnect high voltage wire lead(s) of the high volt-
age rectifier assembly from the magnetron(s).
2. Hold the magnetron thermistor to the thermistor angle
by bending the tab of the thermistor angle.
3. Insert the thermistor angle between the 2nd. fin and
3rd. fin from the upper fin of the upper magnetron and
push it until the thermistor angle stops.
push it until the thermistor angle stops.
NOTE: The magnetron thermistor should be between the
upper fin and the 2nd. fin.
4. Re-install the upper magnetron to the upper waveguide
flange with four (4) screws.
5. Re-install the thermistor angle to the upper waveguide
flange with one (1) screw.
6. Re-install the magnetron exhaust duct to the upper and
lower waveguide flanges with two (2) screws.
7. Route the thermistor harness under the magnetron
temperature fuse.
8. Connect the thermistor harness to the stop switch
harness.
9. Connect the wire leads to the upper magnetron, refer-
ring to the pictorial diagram.
10.Re-install the power supply cord, rear cabinet and
outer case cabinet to the oven by reversing the proce-
dures of "OUTER CASE, REAR CABINET AND
POWER SUPPLY CORD REMOVAL".
dures of "OUTER CASE, REAR CABINET AND
POWER SUPPLY CORD REMOVAL".
Upper magnetron
Upper fin
Tab
Thermistor
angle
angle
Magnetron
thermistor
thermistor
Figure C-1. Magnetron thermistor installation
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STIRRER MOTORS (UPPER AND LOWER) REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Disconnect the wire leads from the blower motor and
2. Remove the rear cabinet, too.
3. Disconnect the wire leads from the blower motor and
blower motor temperature fuse.
4. Remove the one (1) screw holding the blower motor to
the oven cavity.
5. Remove the one (1) screw holding the blower motor to
the chassis support.
UPPER
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the stirrer motor (up-
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the stirrer motor (up-
per).
3. Remove the one (1) screw holding the stirrer motor
(upper) to the oven cavity.
4. Turn and lift up the stirrer motor (upper).
5. Now, the stirrer motor (upper) is free.
5. Now, the stirrer motor (upper) is free.
LOWER
1. Disconnect oven from the power supply.
2. Remove the stirrer motor cover by snipping off the
1. Disconnect oven from the power supply.
2. Remove the stirrer motor cover by snipping off the
material in four portions.
3. Where the portions have been snipped off bend the
portions flat. No sharp edge must be evident after
removal of the stirrer motor cover.
removal of the stirrer motor cover.
4. Disconnect the wire leads from the stirrer motor (lower).
5. Remove the one (1) screw holding the stirrer motor
5. Remove the one (1) screw holding the stirrer motor
(Lower) to the oven cavity.
6. Now, the stirrer motor (lower) is free.
7. After replacement use one (1) screw to fit the stirrer
7. After replacement use one (1) screw to fit the stirrer
motor cover. (This screw has been fitted to the base
plate near the stirrer motor cover beforehand.)
plate near the stirrer motor cover beforehand.)
HOW TO RELEASE THE POSITIVE LOCK
®
CONNECTOR.
Procedure
1. CARRY OUT 3D CHECKS.
2. Pushing the lever of positive lock
1. CARRY OUT 3D CHECKS.
2. Pushing the lever of positive lock
®
connector, pull down
the connector from the terminal.
3. Now, the connector is free.
CAUTION: WHEN CONNECTING THE POSITIVE
LOCK
®
CONNECTORS TO THE TERMI-
NALS, CONNECT THE POSITIVE LOCK
®
CONNECTOR SO THAT THE LEVER
FACES YOU.
FACES YOU.
Now, the the high voltage rectifier assembly is free.
8. Remove two (2) screws holding the capacitor holder to
oven cavity.
Now, the capacitors are free.
Now, the capacitors are free.
CAUTION:
1. DISCHARGE THE TWO HIGH VOLTAGE CAPACI-
1. DISCHARGE THE TWO HIGH VOLTAGE CAPACI-
TORS BEFORE TOUCHING ANY OVEN COMPO-
NENTS OR WIRING.
NENTS OR WIRING.
2. DO NOT REPLACE ONLY THE HIGH VOLTAGE
RECTIFIER. IF IT IS DEFECTIVE, REPLACE THE
HIGH VOLTAGE RECTIFIER ASSEMBLY.
HIGH VOLTAGE RECTIFIER ASSEMBLY.
3. WHEN REPLACING THE HIGH VOLTAGE RECTI-
FIER ASSEMBLY AND THE HIGH VOLTAGE CA-
PACITOR, THE CATHODE (EARTH) SIDE TERMI-
NAL OF THE HIGH VOLTAGE RECTIFIER MUST BE
SECURED FIRMLY WITH A EARTHING SCREW.
PACITOR, THE CATHODE (EARTH) SIDE TERMI-
NAL OF THE HIGH VOLTAGE RECTIFIER MUST BE
SECURED FIRMLY WITH A EARTHING SCREW.
BLOWER MOTOR AND BLOWER MOTOR TEMPERATURE FUSE REMOVAL
6. Remove the one (1) screw holding the air duct to the
blower motor.
7. Remove the blower motor from the oven cavity.
8. Remove the two (2) screws holding the blower motor
8. Remove the two (2) screws holding the blower motor
temperature fuse to the blower motor.
9. Now, the blower motor and blower motor temperature
fuse are free.
Figure C-2. How to release the positive lock connector.
Terminal
Push
Pull down
1
Lever
Positive lock®
connector
2
1. CARRY OUT 3D CHECKS.
2. Remove the oven lamp.
3. Pull the wire leads from the oven lamp socket by
2. Remove the oven lamp.
3. Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket with
the small flat type screw driver.
the small flat type screw driver.
4. Lift up the oven lamp socket .
5. Now, the oven lamp socket is free.
5. Now, the oven lamp socket is free.
OVEN LAMP AND LAMP SOCKET REMOVAL
Figure C-3. Oven lamp socket
Oven lamp
socket
socket
Terminal
Wire lead
Terminal hole
Flate type small
screw driver
screw driver
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