DOWNLOAD Sharp R-82FBSTM (serv.man2) Service Manual ↓ Size: 1.57 MB | Pages: 46 in PDF or view online for FREE

Model
R-82FBSTM (serv.man2)
Pages
46
Size
1.57 MB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven
File
r-82fbstm-sm2.pdf
Date

Sharp R-82FBSTM (serv.man2) Service Manual ▷ View online

R-82FBSTM - 25
WARNING:
Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
1. CARRY OUT 3D CHECKS.
2. Make sure that a definite "click" can be heard when
the microwave oven door is unlatched. (Hold the door
in a closed position, then push the open button
slowly.  This causes the latch heads 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
damage (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;
1. Door does not close firmly.
Please refer to ‘OVEN PARTS, CABINET PARTS, DOOR PARTS’, when carrying out any of the following removal
procedures:
To remove the outer case, proceed as follows.
1. Disconnect oven from power supply.
2. Open door and wedge open.
3. Remove the two screws from the rear intake duct.
4. Slide the rear intake duct up and pull it away from the
oven cavity.
5. Remove 1 screw from rear exhaust duct and unhook
from slots on oven cavity.
6. Remove the screws from the rear (5), along the side
edges (2) hinge side, (2) control panel side and from
the top (2) control side, (2) hinge side.
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
7. Slide the entire case back about 3cm to free it from
the retailing clips on the cavity face plate.
8. Lift the entire case from the oven.
9. Discharge the H.V capacitor before carrying any
further work.
10.Do not operate the oven with the outer case removed.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
OUTER CASE REMOVAL
BUILT IN FRAME ASSEMBLY REMOVAL
To remove the built in frame assembly, proceed as follows.
1. Remove the four screws securing the frame assembly
to the oven cavity, (two from the top and two from the
hinge side).
2. Remove the two screws securing the frame assembly
to the control panel frame (accessed from the back of
the frame)..
3. Open the oven door fully.
4. Un-clip the built in frame assembly at the bottom.
5. Pull the built in frame assembly away from the cavity
face
6. Now the built in frame assembly is free.
TOP SCREWS
C.P SECURING
       SCREWS
HINGE SIDE
     SCREWS
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS
2. Disconnect the filament lead of the high voltage trans-
former and the high voltage transformer secondary
wire from the high voltage capacitor.
3. Disconnect the high voltage wire B from the magnetron.
4. Remove one (1) screw holding earth side terminal of
the high voltage rectifier assembly.
5. Remove one (1) screw holding fan duct to the oven
cavity rear plate.
6. Remove one (1) screw holding capacitor holder to the
oven cavity rear plate.
7. Release the capacitor holder from the fan duct.
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER  ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS
SECURELY FIXED TO THE CAPACITOR.
8. Remove the high voltage capacitor from the capacitor
holder.
9. Disconnect the high voltage wire B and the high
voltage rectifier assembly from the high voltage ca-
pacitor.
10.Disconnect the high voltage rectifier assembly from
the high voltage wire B.
11.Now, the high voltage rectifier assembly and the high
voltage capacitor should be free.
2. Door hinges or latch hook is damaged.
3. The door 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.
R-82FBSTM - 26
Screw; 
LX-EZA045WRE0 
Turntable motor cover
Base plate  
Tabs 
Slits 
Figure C-1(a). Turntable motor cover removal
Figure C-1(b). Turntable motor cover re-install
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the control panel.
3. Remove the one (1) screw holding the control panel to
the oven cavity
4. Lift the control panel assembly and pull it forward.
Now, the control panel assembly is free.
CONTROL PANEL ASSEMBLY REMOVAL
             MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS
2. Disconnect the filament leads of the power transformer
from high voltage capacitor and the magnetron.
3. Disconnect the H.V. secondary wire from the power
transformer.
4. Remove the two (2) screws  holding the transformer
to base plate (from the top side).
5. Remove the transformer from the baseplate by sliding
it away from the oven cavity and lifting it.
6. Now, the power transformer is free.
HIGH VOLTAGE TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Remove the one (1) screw holding the chassis support to
the magnetron.
4. Move the air intake duct to left.
5. Carefully remove three (3) screws holding the magnetron
to the waveguide.  When removing the screws hold the
magnetron to prevent it from falling.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
6. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
7. Ensure the magnetron wiring is refitted in accordance
to the pictorial diagram on page 37 [FA and F].
TURNTABLE MOTOR REPLACEMENT
Removal
1. Disconnect supply.
2. Remove the turntable from the oven cavity.
3. Turn the oven over.
4. Cut the four (4) bridges holding the turntable motor cover to
the base plate with cutting pliers as shown in Figure C-2(a).
CAUTION: DO  NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING THE
BRIDGES. BECAUSE IT WILL DAMAGE THE
WIRE LEADS OF THE MOTOR AND IT IS DIFFI-
CULT TO REMOVE IT OUT OF THE OVEN.
5. Remove the turntable motor cover from the base plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the one (1) screw holding the turntable motor to the
turntable motor angle.
8. Bend the turntable motor retaining tab back to release the
motor.
9. Remove the turntable motor from the turntable motor angle.
Now, the turntable motor is free.
Re-install
1. Remove the any sharp edges on the turntable motor cover
and the base plate with the cutting pliers.
2. Re-install turntable motor by locating shaft onto turntable
motor shaft to the turntable motor angle with the one (1)
screw.
3. Bend the turntable motor retaining tab forward to secure the
motor.
4. Re-connect the wire leads to the turntable motor.
5. Insert the two (2) tabs of the turntable motor cover into the slits
of the base plate as shown in Figure C-2(b).
6. Re-install the turntable motor cover to the base plate with the
screw (LX-EZA045WRE0) as shown in Figure C-2(b).
Cutting pliers
Bridges
Bridges
Turntable motor 
cover
R-82FBSTM - 27
Coil
Gap
Rotor
Bracket
Stator
Groove joint pliers
Shaft
Axis
Stator
Rotor
These are the positions 
that should be pinched 
with pliers.
Shaft
Table
Center of
bracket
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
CONVECTION FAN MOTOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the two (2) screws holding the back plate to oven
cavity.
3. Disconnect the wire leads from the convection motor.
4. Remove the two (2) screws holding the rear heat cover to the
oven cavity from out-side.
5. Remove the four (4) screws holding the convection fan duct
to the oven cavity.
6. Now, the convection fan duct assembly is free.
7. Remove the one (1) nut holding the convection fan,
washers, pipe and the cooling fan to the convection
motor shaft.
8. Remove the three (3) screws holding the rear heat cover to
the convection fan duct.
9. Remove the two (2) screws holding the convection motor to
the rear heat cover.
10. Remove the pipe, washers and the cooling fan from the
convection motor shaft.
11. Remove the ring on the convection motor shaft.
12. Now the convection motor is free.
FAN MOTOR REPLACEMENT
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the noise filter to the
chassis support.
3. Release the noise filter from the tabs of the fan duct.
4. Remove the one (1) screw holding the chassis support
to the oven cavity front flange.
5. Remove one (1) screw holding the chassis support to
the magnetron.
6. Remove the chassis support from the oven cavity.
7. Disconnect the wire leads from the fan duct.
8. Remove the one (1) screw holding the capacitor holder
to the oven cavity back plate.
9. Release the tabs of the capacitor holder from the fan
duct.
10.Remove the one (1) screw holding the fan duct to the
oven cavity back plate.
11.Remove the fan duct from the oven.
12.Remove the fan duct from the fan motor shaft accord-
ing to the following procedure.
1) Hold the edge of the rotor of the fan motor by using
a pair of groove joint pliers.
CAUTION:
Make sure that no swarf from the rotor enters the
gap between the rotor & stator of the fan motor.
Avoid touch the coil of the fan motor with the
pliers as the coil may become cut or damaged.
Avoid deforming the bracket whilst using the
pliers.
2) Remove the fan blade assembly from the shaft of
the fan motor by pulling and rotating the fan blade
with your hand.
3) Now, the fan blade will be free.
   CAUTION:
Do not reuse the removed fan blade as the
fixing hole may be oversize.
12. Remove the two (2) screws holding the fan motor to
the fan duct.
13.  Now, the fan motor is free.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
screws.
2. Instal the fan blade to the fan motor shaft according to
the following procedure.
1) Hold the centre of the bracket which supports the
shaft of the fan motor on a flat table.
2) Apply the screw lock tight into the hole (for shaft) of
the fan blade.
3) Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight, ball
peen hammer or rubber mallet.
CAUTION:
Do not hit the fan blade when installing because
the bracket may be deformed.
Make sure that the fan blade rotates smoothly
after installation.
Make sure that the axis of the shaft is not slanted.
3.  Insert the tabs of the capacitor holder to the fan duct.
4. Install the fan duct to the oven cavity back plate with
the one (1) screw.
5. Install the capacitor holder to the oven cavity back
plate with the one (1) screw.
6. Re-install the chassis support to the cavity back plate
with the one (1) screw.
7. re-fit one (1) screw to secure the chassis support to the
magnetron.
8. Install the noise filter to the fan duct and the chassis
support with the one (1) screw.
9. Re-connect the wire leads to the fan motor.
R-82FBSTM - 28
POWER
SUPPLY CORD
MOULDING
CORD STOPPER
OVEN CAVITY
BACK PLATE
SQUARE HOLE
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the green/yellow
wire to the cavity back plate.
3. Disconnect the leads of the power supply cord from the
noise filter, referring to the Figure C-4(a).
4. Release the power supply cord from the rear cabinet.
5. Now, the power supply cord is free.
Re-install
1. Insert the moulding cord stopper of power supply cord
into the square hole of the cavity backplate, referring to
the Figure C-4(b).
2. Install the earth wire lead of power supply cord to the
oven cavity with one (1) screw and tight the screw.
3. Connect the brown and blue wire leads of power supply cord
to the noise filter correctly, referring to the Pictorial Diagram.
POWER SUPPLY CORD REPLACEMENT
TOP HEATING ELEMENT REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the two (2) screws holding the two (2) terminals
of the main wire harness to the top heating element.
3. Remove the two (2) screws holding the two (2) grill
heater angles to the top of the oven cavity.
4. Remove the two (2) grill heater angles from the oven
cavity.
5. Remove the top heating element from the top of the
oven cavity.
6. Now the top heating element is free.
Figure C-4 (a) Replacement of Power Supply Cord
Figure C-4(b). Power Supply Cord Replacement
BOTTOM HEATING ELEMENT REMOVAL
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
1. CARRY OUT 3D CHECKS.
2. Remove the turntable motor cover from the base plate,
referring to "TURNTABLE MOTOR REPLACEMENT".
3. Disconnect the wire leads from the bottom heating
element.
4. Remove the two (2) nuts holding the heater cover and
heater packing to the bottom heater.
5. Remove the heater cover and the heater packing from
the bottom heating element.
6. Re-move the two(2) nuts holding the bottom heating
element to the oven cavity.
7. Remove the bottom heating element from the oven
cavity .
Power supply cord
Green / Yellow
Wire
Brown Wire
         (L)
Noise filter
Noise filter holder
Moulded
Cord
Stopper
Blue Wire(N)
Red Wire
Black Wire
TP
TL
White Wire
Red Wire
Oven lamp
OVEN LAMP REMOVAL
Lock
Socket
Bulb
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire lead from the oven lamp
3. Lift up the oven lamp from the clips of the air intake
duct.
4. Now, the oven lamp is free.
Terminal
Push
Pull down
1
2
Lever
Positive lock¤
connector
POSITIVE LOCK
®
  CONNECTOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
®
 connector.
3. Pull down on the positive lock
®
 connector.
CAUTION: WHEN YOU (SERVICE ENGINEER) CONNECT
THE POSITIVE LOCK
®
 CONNECTORS TO THE
TERMINALS, CONNECT THE POSITIVE LOCK
®
SO THAT THE LEVER FACES YOU.
Figure C-2.  Positive lock
®
connector
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