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 - 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
R-82FBSTM - 29
Latch hook
Door
SW2: Stop switch
Latch
Heads
SW3: Monitor switch
SW1: Monitored
latch switch
Tab
MONITORED LATCH SWITCH,  STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
If the monitored latch switch, stop switch and monitor switch do
not operate properly due to a mis-adjustment, the following
adjustment should be made.
1. CARRY OUT 3D CHECKS.
2. Loosen the two (2) screws holding the latch hook to the
oven cavity front flange.
3. With the door closed, adjust the latch hook by moving it back
and forward or up and down. In and out play of the door
allowed by the latch hook should be less than 0.5 mm. The
horizontal position of the latch hook should be placed where
the monitor switch has activated with the door closed. The
vertical position of the latch hook should be placed where the
monitored latch switch and stop switch have activated with
the door closed.
4. Secure the screws with washers firmly.
5. Make sure that all switches operate. If the latch head has not
pushed the plungers of the monitor switch with door closed,
adjust the latch hook position.
At that time, the latch head should have pushed the plung-
ers of the monitored latch switch and stop switch. If the latch
head has not pushed the plungers of the monitored latch
switch and stop switch with door closed, loose two (2) screws
holding latch hook to oven cavity front flange and adjust the
latch hook position.
After adjustment, make sure of following:
1. In and out play of door remains less than 0.5 mm when
latched position. First check the latch hook position, pushing
and pulling upper portion of the door toward the oven face.
Then check the lower latch hook position, pushing and
pulling lower portion of the door toward the oven face. Both
results (play of the door) should be less than 0.5mm.
2. The contacts (COM-NO) of the stop switch and the moni-
tored latch switch open within 1.8mm gap between right
side of cavity face plate and door when door is opened.
3. When the door is closed, the contacts (COM-NO) of the stop
switch close.
4. When the door is closed the contacts (COM-NC) of the
monitor switch and monitored latch switch open. And the
contacts (COM-NO) of their switches close.
5. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Figure C-6 Latch Switches Adjustment
MONITORED LATCH SWITCH,  MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to "CON-
TROL PANEL ASSEMBLY REMOVAL".
3. Disconnect the leads from all switches.
4. Remove the two (2) screws holding the latch hook to
the oven cavity.
5. Remove the latch hook.
6. Remove the switch(es) from the latch hook by pushing
the retaining tab backwards slightly and turning the
switch(es) on the post.
7. Now the switch(es) is free.
SW2: Stop switch
SW3: Monitor switch
SW1: Monitored
latch switch
Tab
Post
Post
Figure C-5. Switches
Page of 46
Display

Click on the first or last page to see other R-82FBSTM (serv.man2) service manuals if exist.