Sharp R-8000GK Service Manual ▷ View online
R-8000GK
24
EXHAUST DUCT REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to “BACK
PLATE REMOVAL”.
3. Remove the door assembly from the oven, referring to
“DOOR REPLACEMENT”, and remove the door springs, the
door cam right and the door cam left.
door cam right and the door cam left.
4. Remove each two (2) screws holding the oven hinges left and
right.
5. Remove the high voltage transformer, magnetron, magnetron
separator, high voltage capacitor assembly, fan motor (high
voltage transformer side) with fan motor mounting angle, and
fan motor (magnetron side), referring to their removal
procedures.
voltage transformer side) with fan motor mounting angle, and
fan motor (magnetron side), referring to their removal
procedures.
6. Disconnect the wire leads from all electrical parts except for
the turntable motor, monitor switch, secondary interlock
switch, door sensing switch and 3rd. latch switch.
switch, door sensing switch and 3rd. latch switch.
7. Remove each one (1) screw holding the latch hook right and
latch hook left from the oven cavity front plate.
8. Remove each one (1) screw holding the right and left chassis
supports to the oven cavity front plate.
9. Remove the two (2) screws holding the exhaust duct to the
oven cavity. And remove it.
10. Now, exhaust duct is free.
HEATER DUCT LEFT ASSEMBLY REMOVAL
11. Remove the three (3) screws holding the damper duct
assembly to the thermal cover upper and the waveguide.
12. Remove the damper duct assembly from the oven.
13. Remove the one (1) screw holding the thermal cover back to
13. Remove the one (1) screw holding the thermal cover back to
the separator left.
14. Remove the two (2) screws holding the separator left to the
thermal cover upper. And remove it.
15. Disconnect the connector of the touch control transformer
from the power unit.
16. Remove the one (1) screw holding the touch control
transformer to the bottom plate. And remove it.
EXHAUST DUCT, HEATER DUCT LEFT ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
HEATER DUCT UPPER ASSEMBLY REMOVAL
17. Remove the two (2) screws holding the PWB mounting angle
to the bottom plate.
18. Remove the PWB mounting angle with the power unit from
the bottom plate.
19. Remove the three (3) screws holding the thermal cover left to
the heater duct left.
20. Remove the one (1) screw holding the thermal cover left to
the thermal cover upper.
21. Straighten the three (3) tabs holding the thermal cover left to
the oven cavity, and remove the thermal cover left and the
thermal insulation left from the oven cavity.
thermal insulation left from the oven cavity.
22. Remove the two (2) screws holding the thermal cover upper
to the heater duct upper.
23. Straighten the four (4) tabs holding the thermal cover upper
to the oven cavity, and remove the thermal cover upper and
the thermal insulation upper from the oven cavity.
the thermal insulation upper from the oven cavity.
24. Straighten the two (2) tabs holding the thermal insulation
upper, and remove it.
25. Remove the fourteen (14) screws holding the heater duct left
to the oven cavity and the convection duct.
26. Remove the heater duct left assembly from the oven cavity.
27. Now, the heater duct left assembly is free.
27. Now, the heater duct left assembly is free.
CONVECTION DUCT ASSEMBLY REMOVAL
28. Remove the two (2) screws holding the convection motor
mounting angle to the bottom plate from under the bottom
plate.
plate.
29. Remove the fourteen (14) screws holding the convection
duct to the oven cavity and the heater duct upper.
30. Remove the convection duct assembly (with the jet motor)
from the oven cavity.
31. Now, the convection duct assembly (with the jet motor) is free.
HEATER DUCT UPPER ASSEMBLY REMOVAL
32. Remove the nine (9) screws holding the heater duct upper to
the oven cavity.
33. Remove the heater duct upper from the oven cavity.
34. Now, the heater duct upper assembly is free.
34. Now, the heater duct upper assembly is free.
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to “BACK
PLATE REMOVAL”.
3. Remove the heater duct left assembly from the oven cavity,
referring to "EXHAUST DUCT, HEATER DUCT LEFT
ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
SIDE HEATING ELEMENT REMOVAL
HEATER DUCT UPPER ASSEMBLY REMOVAL".
4. Remove the one (1) screw holding the heater mounting angle
B to the heater duct left.
5. Remove the two (2) nuts holding the side heating element to
the heater duct left.
6. Now, the side heating element is free.
JET MOTOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to “BACK
PLATE REMOVAL”.
3. Remove the convection duct assembly from the oven cavity,
referring to "EXHAUST DUCT, HEATER DUCT LEFT
ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
HEATER DUCT UPPER ASSEMBLY REMOVAL".
ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
HEATER DUCT UPPER ASSEMBLY REMOVAL".
4. Loosen the one (1) screw holding the convection fan assembly
to the jet motor shaft with a hexagon key wrench, and remove
the convection fan.
the convection fan.
5. Remove the four (4) screws holding the convection motor
mounting angle to the convection duct.
6. Remove the six (6) screws holding the jet motor to the
convection motor mounting angle.
7. Remove the jet motor from the convection motor mounting angle.
8. Now, the jet motor is free.
8. Now, the jet motor is free.
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to “BACK
PLATE REMOVAL”.
3. Remove the heater duct left assembly from the oven cavity,
referring to "EXHAUST DUCT, HEATER DUCT LEFT
ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
ASSEMBLY, CONVECTION DUCT ASSEMBLY AND
TOP HEATING ELEMENT REMOVAL
HEATER DUCT UPPER ASSEMBLY REMOVAL".
4. Remove the one (1) screw holding the heater mounting angle
A to the heater duct upper.
5. Remove the two (2) nuts and the two (2) screws holding the
top heating element to the heater duct upper.
6. Now, the top heating element is free.
R-8000GK
25
TURNTABLE MOTOR REMOVAL
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the switch.
3. Remove the one (1) screw holding the latch hook (right or left)
3. Remove the one (1) screw holding the latch hook (right or left)
to the oven cavity front plate, and release the latch hook (right
or left).
or left).
4. Keep pushing the stopper tab holding the switch to the latch
hook (right or left) and revolve the switch on the pole.
5. Remove the switch from the latch hook (right or left).
6. Now, the switch is free.
Reinstallation
1. Reinstall the switch in its place. The door sensing switch is in
6. Now, the switch is free.
Reinstallation
1. Reinstall the switch in its place. The door sensing switch is in
the lower position of the latch hook right. The 3rd. latch switch
is in the upper position of the latch hook right. The secondary
interlock switch is in the lower position of the latch hook left. And
the monitor switch is in the upper position of the latch hook left.
is in the upper position of the latch hook right. The secondary
interlock switch is in the lower position of the latch hook left. And
the monitor switch is in the upper position of the latch hook left.
2. Hold the latch hook (right or left) to the oven cavity front plate
with the one (1) screw.
DOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH, 3RD LATCH SWITCH AND
MONITOR SWITCH REPLACEMENT
3. Reconnect the wire leads to the switch.
4. Make sure that the monitor switch is operating properly and
4. Make sure that the monitor switch is operating properly and
check continuity of the monitor circuit. Refer to chapter “Test
Procedure” and “Adjustment procedure.
Procedure” and “Adjustment procedure.
Figure C-5. Switches
If the door sensing switch, secondary interlock switch, 3rd latch
switch and monitor switch do not operate properly due to a
misadjustment, the following adjustment should be made.
switch and monitor switch do not operate properly due to a
misadjustment, the following adjustment should be made.
1. CARRY OUT 3D CHECKS.
2. Loosen each one (1) screw holding the latch hook right and
the latch hook left to the oven cavity front plate.
3. With door closed, adjust the latch hook right and the latch
hook left by moving them back and forth, and up and down.
In and out play of the door allowed by the latch hook right and
the latch hook left should be less than 0.5 mm. The vertical
position of the latch hook right and the latch hook left should
be adjusted so that the door sensing switch and the secondary
interlock switch are activated with the door closed. The
horizontal position of the latch hook right and the latch hook
left should be adjusted so that the plungers of the monitor
switch and the 3rd. latch switch are pressed with the door
closed.
In and out play of the door allowed by the latch hook right and
the latch hook left should be less than 0.5 mm. The vertical
position of the latch hook right and the latch hook left should
be adjusted so that the door sensing switch and the secondary
interlock switch are activated with the door closed. The
horizontal position of the latch hook right and the latch hook
left should be adjusted so that the plungers of the monitor
switch and the 3rd. latch switch are pressed with the door
closed.
4. Secure the screws firmly.
5. Check all of the switches operation. If each switch has not
5. Check all of the switches operation. If each switch has not
activated with the door closed, loosen the screws and adjust
the position of the latch hook right and the latch hook left.
the position of the latch hook right and the latch hook left.
After adjustment, check the following.
1. In and out play of the door remains less than 0.5 mm when
1. In and out play of the door remains less than 0.5 mm when
in the latched position. First check the position of the latch
hook right, pushing and pulling right portion of the door
toward the oven face. Then check the position of the latch
hook left, pushing and pulling left portion of the door toward
the oven face. Both results (play in the door) should be less
than 0.5 mm.
hook right, pushing and pulling right portion of the door
toward the oven face. Then check the position of the latch
hook left, pushing and pulling left portion of the door toward
the oven face. Both results (play in the door) should be less
than 0.5 mm.
DOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH, 3RD LATCH SWITCH AND
MONITOR SWITCH ADJUSTMENT
2. The door sensing switch and the secondary interlock switch
interrupt the circuit before the door can be opened.
3. The monitor switch contacts close when the door is opened.
4. The 3rd. latch switch interrupt the circuit when the door is
4. The 3rd. latch switch interrupt the circuit when the door is
opened.
5. Reinstall the outer case cabinet and check for microwave
leakage around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
meter. (Refer to Microwave Measurement Procedure.)
Figure C-6. Latch Switch Adjustment
flat. No sharp edges must be evident after removal of the
turntable motor.
turntable motor.
7. Disconnect the wire leads from the turntable motor.
8. Remove the one (1) screw holding the turntable motor to the
8. Remove the one (1) screw holding the turntable motor to the
oven cavity bottom plate.
9. Now, the turntable motor is free.
10. After replacement, use the one (1) screw to fit the turntable
10. After replacement, use the one (1) screw to fit the turntable
motor cover.
Door
sensing switch
(Primary interlock
relay control switch)
sensing switch
(Primary interlock
relay control switch)
Latch hook right
Monitor
switch
switch
3rd. latch
switch
switch
Latch hook left
Secondary
interlock
switch
(Monitored
latch switch)
interlock
switch
(Monitored
latch switch)
Pole
Pole
Pole
Pole
Stopper
tab
tab
Stopper
tab
tab
Stopper
tab
tab
Stopper
tab
tab
Monitor switch
Latch hook left
3rd. latch
switch
switch
Latch
head
head
Secondary
interlock switch
(Monitored latch switch)
interlock switch
(Monitored latch switch)
Door
sensing switch
(Primary interlock
relay control switch)
sensing switch
(Primary interlock
relay control switch)
Latch hook right
Latch
head
head
1. Disconnect the power supply cord.
2. Wait for 60 seconds to discharge the high voltage capacitor.
3. Remove the turntable tray and the turntable support from the
2. Wait for 60 seconds to discharge the high voltage capacitor.
3. Remove the turntable tray and the turntable support from the
oven cavity.
4. Lay the oven on its backside.
5. Remove the turntable motor cover by snipping off the material
5. Remove the turntable motor cover by snipping off the material
in four corners.
6. Where the corners have been snipped off, bend corner areas
R-8000GK
26
2. The door is positioned with its face pressed toward oven
cavity front plate.
3. Reinstall the outer case cabinet and check for microwave
leakage around the door with an approved microwave
survey meter. (Refer to Microwave Measurement Procedure.)
survey meter. (Refer to Microwave Measurement Procedure.)
NOTE: The door on a microwave oven is designed to act as
an electronic seal preventing the leakage of
microwave energy from the oven cavity during cook
cycle. This function does not require that the door
be airtight, moisture (condensation)-tight or light-
tight. Therefore, occasional appearance of moisture,
light or sensing of gentle warm air movement around
the oven door is not abnormal and do not of
themselves indicate a leakage of microwave energy
from the oven cavity. If such were the case, your
oven could not be equipped with a vent, the very
purpose of which is exhaust the vapor-laden air
from the oven cavity.
microwave energy from the oven cavity during cook
cycle. This function does not require that the door
be airtight, moisture (condensation)-tight or light-
tight. Therefore, occasional appearance of moisture,
light or sensing of gentle warm air movement around
the oven door is not abnormal and do not of
themselves indicate a leakage of microwave energy
from the oven cavity. If such were the case, your
oven could not be equipped with a vent, the very
purpose of which is exhaust the vapor-laden air
from the oven cavity.
Figure C-7(a). Door Replacement
Figure C-7(b). Door Replacement
Door assembly removal
1. CARRY OUT 3D CHECKS.
2. Close the door.
3. Remove the two (2) door springs from the door cam right,
3. Remove the two (2) door springs from the door cam right,
oven hinge right, door cam left and oven hinge left.
4. Release the door cams right and left from the right and left
door cam pins of the door.
5. Remove the door cams right and left from the oven cavity
front plate.
6. Open the door assembly at an angle of more than 90˚ with the
oven cavity front plate.
7. To release the right and left door hinge pins of the door
assembly from the oven hinges right and left, slide the door
assembly leftward. When removing the door assembly, hold
the door assembly to prevent it from falling.
assembly leftward. When removing the door assembly, hold
the door assembly to prevent it from falling.
8. Now, the door assembly is free.
NOTE: When the individual parts are replaced, refer to
NOTE: When the individual parts are replaced, refer to
“Door Disassembly”
Door assembly reinstallation
1. On reinstalling the door assembly, insert the oven hinges
right and left into the right and left door hinge pins.
2. Insert and hook the door cams right and left to the right and
left door cam pins.
3. Reinstall the two (2) door springs between the door cams and
the oven hinges right and left.
NOTE: After any service to the door;
(A) Make sure that the door sensing switch, the secondary
(A) Make sure that the door sensing switch, the secondary
interlock switch, the 3rd. latch switch and the monitor
switch are operating properly. (Refer to chapter “Test
Procedure”.)
switch are operating properly. (Refer to chapter “Test
Procedure”.)
(B) An approved microwave survey meter should be used
to assure compliance with proper microwave radiation
emission limitation standards.
emission limitation standards.
Door adjustment
When removing and/or loosening the oven hinges such as in door
replacement, the following adjustment criteria are taken.
Door adjustment is performed with the door properly installed
and closed and while the oven hinges are loose.
1. Loosen the screws holding the oven hinge right and the oven
replacement, the following adjustment criteria are taken.
Door adjustment is performed with the door properly installed
and closed and while the oven hinges are loose.
1. Loosen the screws holding the oven hinge right and the oven
hinge left to the bottom plate with screwdriver.
2. Adjust the door by moving it so that the door is parallel with
the oven cavity front plate lines (right and left side lines) and
the door latch heads pass through the latch holes correctly.
the door latch heads pass through the latch holes correctly.
3. Tighten the screws holding the oven hinge right and the oven
hinge left to the bottom plate.
After adjustment, make sure of the following:
1. The door latch heads smoothly catch the latch hooks through
1. The door latch heads smoothly catch the latch hooks through
latch holes and the latch heads goes through center of latch
holes.
holes.
DOOR REPLACEMENT AND ADJUSTMENT
Door cam left
Door
assembly
assembly
Door
spring
spring
Door spring
Oven hinge
left
left
Oven hinge
right
right
Door cam right
Door cam left
Door
assembly
assembly
Oven hinge
left
left
Oven hinge
right
right
Door cam right
Left door
cam pin
cam pin
Right door
cam pin
cam pin
Left door
hinge pin
hinge pin
Right door
hinge pin
hinge pin
1. CARRY OUT 3D CHECKS.
2. Remove the door assembly, referring to “Door Replacement”.
3. Place the door assembly on a soft cloth with latch heads
3. Place the door assembly on a soft cloth with latch heads
facing up.
NOTE: As the engaging parts of the choke cover and the
door panel assembly are provided at 16 places, do
not force any particular part.
not force any particular part.
4. Replacement of the door components are as follows:
CHOKE COVER
5. Insert a putty knife (thickness of about 0.5 mm) into the gap
between the choke cover and the door panel assembly as
DOOR DISASSEMBLY
shown in Figure C-8.
6. Lift up the choke cover.
7. Now, the choke cover is free from the door panel assembly.
NOTE: When carrying out any repair to the door, do not
7. Now, the choke cover is free from the door panel assembly.
NOTE: When carrying out any repair to the door, do not
bend or wrap the slit choke (tabs on the door panel
assembly) to prevent microwave leakage.
assembly) to prevent microwave leakage.
DOOR HANDLE ASSEMBLY
8. Remove the two (2) screws holding the door handle assembly
to the door panel assembly through the door frame.
9. Now, the door handle is free.
R-8000GK
27
DOOR PANEL ASSEMBLY, LATCH HEAD RIGHT
AND LATCH HEAD LEFT
AND LATCH HEAD LEFT
10. Remove the fourteen (14) screws holding the door panel
assembly to the door frame.
11. Remove the door panel assembly from the door frame.
12. Remove the one (1) screw holding the latch head right to the
12. Remove the one (1) screw holding the latch head right to the
door panel assembly.
13. Remove the latch spring right from the latch head right and
the handle lever.
14. Now, the latch head right is free.
15. Remove the one (1) screw holding the latch head left to the
15. Remove the one (1) screw holding the latch head left to the
door panel assembly.
16. Remove the latch spring left from the latch head left and the
handle lever.
17. Now, the latch head left is free.
18. Release the two (2) handle springs from the two (2) handle
18. Release the two (2) handle springs from the two (2) handle
levers.
19. Pull out the two (2) handle pins from the two (2) handle levers.
20. Remove the two (2) handle levers and two (2) handle springs
20. Remove the two (2) handle levers and two (2) handle springs
from the door panel.
21. Now, the door panel is free.
MIDDLE DOOR GLASS
22. Remove the two (2) screws holding the glass mounting angle
B to the door frame.
23. Remove the middle door glass from the door frame.
24. Now, the middle door glass is free.
24. Now, the middle door glass is free.
FRONT DOOR GLASS
25. Remove each two (2) screws holding the two glass mounting
angles A to the door frame.
26. Remove the two (2) glass mounting angles A from the door
frame.
27. To release the two (2) tabs holding the lower end of the front
door glass, slide the front door glass upward.
28. Release the three (3) tabs holding the upper end of the front
door glass and remove the front door glass from the door
frame.
frame.
29. Now, the front door glass is free.
Figure C-8. Door Disassembly
Choke
Cover
Cover
Door
Frame
Frame
Door Panel
Assembly
Assembly
Putty Knife
Control panel assembly
1. CARRY OUT 3D CHECKS.
2. Disconnect the harness assembly from the connector CN-G
on the power unit.
3. Remove the four (4) screws holding the control panel assembly
to the oven cavity front plate.
4. Slide the control panel assembly leftward to release the eight
(8) tabs of the control panel assembly from the oven cavity
front plate.
front plate.
5. Now, the control panel assembly is free.
CPU unit
6. Remove the four (4) screws holding the panel angle to the
panel sub assembly.
7. Release the panel angle from the two (2) tabs of the panel sub
assembly first.
8. Pull out the panel angle from the panel sub assembly and
remove it.
9. Disconnect the harness from the connector CN-J on the CPU
unit.
10. Disconnect the harness assembly from the connector CN-H
on the CPU unit.
11. Remove the seven (7) screws holding the CPU unit to the
panel sub assembly.
CONTROL PANEL ASSEMBLY, CPU UNIT AND CONTROL UNIT REMOVAL
12. Now, the CPU unit is free.
Control unit
11. Remove the eleven (11) screws holding the control unit to the
panel sub assembly.
12. Now, the control unit is free.
NOTE: After the panel angle is removed from the panel sub
NOTE: After the panel angle is removed from the panel sub
assembly, it is can be found that the bottom side of the
panel sub assembly is transformed by heat. But it is not
abnormal and no problem to use the oven.
panel sub assembly is transformed by heat. But it is not
abnormal and no problem to use the oven.
Figure C-9. Panel Angle Removal
Tabs
Screw
Screw
Screw
Screw
Panel angl
Panel sub assembly
Bottom side of
panel sub assembly
panel sub assembly
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