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Model
R-62FBSTM
Pages
36
Size
949.28 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven
File
r-62fbstm.pdf
Date

Sharp R-62FBSTM Service Manual ▷ View online

R-61FBSTM/R-62FBSTM - 21
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove the two (2) screws holding the fan motor to the
oven cavity back plate. The fan motor is now free.
4. Remove the fan blade from the fan motor shaft according
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 any pieces do not enter the gap
between the rotor and the starter of the fan motor.
Because the rotor is easy to be shaven by pliers
and metal pieces may be produced.
Do not let the pliers touch the coil of the fan motor
because the coil may be cut or damaged.
Do not distort the bracket by touching with the
pliers.
2) Remove the fan blade 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 use this removed fan blade again.
Because the hole (for shaft) of it may become
bigger than a standard one.
INSTALLATION
1. Install 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) 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.
2. Install the fan motor to the oven cavity back plate with the
two (2) screws.
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
FAN MOTOR REPLACEMENT
1. Disconnect the oven from the power supply.
2. Remove the turntable motor cover by snipping off the
material in four corners.
3. Where the corners have been snipped off bent corner
areas flat. No sharp edge must be evident after removal
of turntable motor cover.
4. Disconnect the wire leads from the turntable motor and
remove the one (1) screw holding the turntable motor.
5. Turntable motor is now free.
6. After replacement use one (1) screw to fit the turntable
motor cover.(LX-CZA001URE0)
TURNTABLE MOTOR REMOVAL
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
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Move the air intake duct to left.
4. Carefully remove two (2) screws holding magnetron to the
waveguide.
5. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND
THE MAGNETRON MOUNTING SCREWS
ARE TIGHTENED SECURELY.
REINSTALL THE MAGNETRON TO WAVE
GUIDE FLANGE WITH THE TWO (2)
SCREWS DIAGONALLY.
             MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS
2, Disconnect the primary connections from high voltage
transformer.
3. Disconnect the filament leads of the power transformer
from high voltage capacitor and the magnetron.
4. Disconnect the H.V. secondary wire from the power
transformer.
HIGH VOLTAGE TRANSFORMER REMOVAL
Shaft
Axis
Stator
Rotor
These are the positions 
that should be pinched 
with pliers.
Shaft
Table
Center of
bracket
Coil
Gap
Rotor
Bracket
Stator
Groove joint pliers
  3. Re-connect the wire leads to the fan motor, referring to the
pictorial diagram.
Rear view                                     Side view
5. Remove the four (4) screws  holding the transformer to
base plate (from the under side).
6. Remove the transformer from the baseplate by sliding it
away from the oven cavity and lifting it.
7. Now, the power transformer is free.
R-61FBSTM/R-62FBSTM - 22
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the wiring of the main harness from the noise
Figure C-1 (a) Replacement of Power Supply Cord
Figure C-1(b). Installation of Power Supply Cord
Oven lamp
filter.
3. Remove the two (2)screws securing the N.F.U. holder to
the baseplate.
4. Remove the one(1) screw holding the green/yellow(earth
wire) to the N.F.U. holder assembly.
5. Release the power supply cord stopper from the N.F.U
holder assembly by sliding it out.
6. Remove the wiring of the power cord from the noise filter.
7. Now the power supply cord is free.
Re-install
1. Insert the moulding cord stopper of power supply cord
into the cut-out of the N.F.U. holder assembly, referring
to the Figure C-1(b). Installation of Power supply cord.
2. Install the earth wire lead of power supply cord to the
N.F.U holder assembly  with one (1) screw and  tighten.
3. Connect the brown and blue wire leads of power supply
cord to the noise filter correctly, referring to the Pictorial
Diagram.C-1(a)
4. Re-fit the N.F.U. holder assembly to the base plate with
the two (2) screws.
5. Connect the main harness wiring to the noise filter
correctly, referring to the Pictorial Diagram(figure C-
1(a)
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
OVEN LAMP REMOVAL
Lock
Socket
Bulb
Power supply cord
Green / Yellow
Wire
Brown Wire
         (L)
Noise filter
Noise filter holder
Moulded
Cord
Stopper
Blue Wire(N)
Red
Red
Black
Black
TP
TL
White
Red
Red
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.
POWER SUPPLY CORD REPLACEMENT
MOULDING
CORD
STOPPER
POWER SUPPLY
CORD
GROMMET
MOULDING
TOP HEATING ELEMENT REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the two (2) screws holding the (2) terminals of
the main wire harness to the top heating element.
3. Remove the one(1)  screw holding the grill heater angle
to the top of the oven cavity.
4. Remove the one(1) screw holding the shielding grill
heater angle to the top of the oven cavity.
5. Remove the grill heater angle from the oven cavity.
6. Remove the shielding grill heater angle from the oven
cavity.
7. Remove the top heating element from the top of  the oven
cavity.
8. Now the top heating element is free.
R-61FBSTM/R-62FBSTM - 23
Figure C-3. Latch Switch Adjustments
below.
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the switches and control
panel.
3. Remove the control panel assembly from the oven cavity
front flange. Referring to chapter "CONTROL PANEL
ASSEMBLY REMOVAL".
4. Remove the one (1) screw holding the latch hook to the
oven flange.
5. Remove the latch hook assembly from the oven flange.
6. To remove the switch.
6-1. With pushing outward on the tab that is holding the
switch, turn the switch so that the post is an axis.(Monitor
Switch)
With pushing outward on the tab that is holding the
switch, slide  the switch out of the latch hook.(Stop
Switch and Monitored Latch switch)
6-2. Pull out the switch from the latch hook. Do not break the
post or tab of the latch hook.
6-3. Now the switch is free.
Re-install
1. Re-install each switch in its place. The monitored latch
switch is in the lower position and the monitor switch is
in the middle position. The stop switch is in the upper
position.
2. Re-connect wire leads to each switch. Refer to chapter
“Pictorial Diagram”.(page 29)
3. Secure latch hook (with one (1) mounting screw) to oven
4. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
flange.
4. Re-install the control panel assembly to the oven cavity
front flange.
5. Re-connect wire leads to the control unit. Refer to
chapter “Pictorial Diagram”.(page 29).
6. Make sure that monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter “Test Procedure”, and Adjustment Procedure
Figure C-2. Latch Switches Removal
1. CARRY OUT 3D CHECKS.
     If the monitored latch switch, stop switch and monitor
     switch do not operate properly due to a misadjustment,
     the following adjustment should be made.
2. Loosen the one (1) screw holding the latch hook to the
flange of the oven front face.
3. With the door closed, adjust latch hook by moving it up
and down. In and out play of the door allowed by the
upper and lower position of the latch hook should be less
than 0.5mm.  The vertical position of the latch hook
should be adjusted so that the stop switch and the
monitored latch switch are activated with the door closed.
4. Secure the screw firmly.
5. Check the operation of all switches. If each switch has not
activated with the door closed, loosen screw and adjust
the latch hook position.
After adjustment, make sure of the following.
1. In and out play of the door remains less than 0.5mm when
in the latched position. First check upper position of latch
hook, pushing and pulling upper portion of door toward
the oven face. Then check lower portion of the latch hook,
pushing and pulling lower portion of door toward the oven
face. Both results (play in the door) should be less than
0.5mm.
2. The monitored latch switch and stop switch interrupt the
circuit before the door can be opened.
3. The monitor switch contacts (COM-NC) close when the
door is opened.
MONITORED LATCH SWITCH,  MONITOR SWITCH AND STOP SWITCH ADJUSTMENT
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
MONITORED LATCH SWITCH,  MONITOR SWITCH AND STOP SWITCH REMOVAL
Latch hook
Tab
SW3: Stop switch 
SW2: Monitor switch 
SW1:  Monitored latch switch 
Tab
Tab
Latch hook
SW3: Stop switch
Door
SW2: Monitor switch
SW1:Monitored latch switch
Latch heads
R-61FBSTM/R-62FBSTM - 24
 Figure C-6. Inner Sealer Film
Measurement Procedure.)
Note:
The door on a microwave oven is designed to
act as an electronic seal preventing the leakage
of microwave energy from oven cavity during
cook cycle. This function does not require the
door be air-tight, moisture (condensation)-tight
or light-tight. Therefore, occasional appearance
of moisture, light or sensing of gentle warm air
movement around oven door is not abnormal
and does not indicate leakage of microwave
energy from the oven cavity.
Figure C-5. Door Replacement
NOTE: When carrying out any repair to the door,
do not bend or warp the slit choke (tabs on
the door panel assembly) to prevent
microwave leakage.
INNER SEALER FILM
Installation
1. Tear away the backing film.
3. Put the pasted side of the inner sealer film on the door
panel.
REMOVAL
1. Disconnect the power supply cord.
2. Open the door slightly and remove the built in frame
assembly(Ref: to chapter built in frame assembly
removal).
3. Remove the choke cover taking care not to break clips
by inserting an  iron plate (thickness of about 0.5mm) or
flat type screw driver to the gap between the choke cover
and door panel as shown Figure C-4 to free the engaged
parts.
4. Release choke cover  from door panel.
5. Now choke cover is free.
Figure C-4. Door Disassembly
6. Release two (2) pins of door panel from two (2) holes of
upper and lower oven hinges by lifting up.
7. Remove door assy by removing screws (4).
8. Release door panel from tabs of door frame and remove
door frame.
9. Now, door panel with inner sealer film is free.
10.Tear inner sealer film from door panel.
11.Now, door panel is free.
12.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
13.Now, latch head and latch spring are free.
RE-INSTALL
1. Re-install latch spring to the head. Re-install latch spring
to the door frame. Re-install latch head to the door
frame.
2. Re-install door panel to door frame by fitting tabs of door
frame to holes of door panel.
3. Put sealer film on door panel. Refer to “Inner Sealer
Film” and figure C-6, on how to handle the new film.
4. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
5. Re-install choke cover  to door panel by pushing.
Note: After any service to the door;
(A) Make sure that monitored latch switch, stop switch
and monitor switch are operating properly. (Refer
to chapter “Test Procedures”.).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of
latch hole.
2. Deviation of door alignment from horizontal line of cavity
face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity
face plate.
4. Check for microwave leakage around door with an
approved microwave survey meter.  (Refer to Microwave
Door film
Finger tab
Backing film
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
PIN
PIN
LOWER
OVEN HINGE
UPPER
OVEN HINGE
LOWER
OVEN HINGE
CHOKE COVER
DOOR
PANEL
DOOR SUB 
ASSEMBLY
SLIT CHOKE
10
5
4
12
8
7
9
11
3
2
1
Choke Cover
Door Frame
Putty Knife
6
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