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Model
R-206 (serv.man2)
Pages
32
Size
543.12 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Complete (green, white and silver models)
File
r-206-sm2.pdf
Date

Sharp R-206 (serv.man2) Service Manual ▷ View online

R-206(G)
R-206(SL)
R-206(W)
15
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING:
Avoid possible exposure to microwave energy. Please follow the instructions
below before operating the oven.
1. Disconnect oven from power supply.
2. 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;
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
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.
POWER TRANSFORMER REMOVAL
Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any
of the following removal procedures:
To remove the outer case proceed as follows.
1. Disconnect the oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the eight (8) screws from rear and along the
side edge of case.
4. Slide the entire case back about 3cm to free it from
retaining clips on the cavity face plate.
5. Lift the entire case from the oven.
To prevent an electric shock, take the following
manners.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High volt-
age capacitor, High voltage fuse and High voltage
rectifier assembly.
WARNING FOR WIRING
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer
and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its pin
is locked. And make sure that the wire leads should
not  come off even if the wire leads is pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
OUTER CASE REMOVAL
6. Discharge the H.V. capacitor before carrying out any
further work.
7. Do not operate the oven with the outer case removed.
N.B.; Step 1, 2 and 6 form the basis of the 3D checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN COMPO-
NENT OR WIRING.
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads (main wire harness and H.V.
fuse) from power transformer.
3. Disconnect the filament lead of power transformer from
the magnetron.
4. Disconnect the filament lead of the power transformer
from high voltage capacitor.
5. Remove the two (2) screws holding the transformer to
bottom plate from below.
6. Remove the two (2) screws holding the transformer to
bottom plate from above.
7. Remove the transformer.
R-206(G)
R-206(SL)
R-206(W)
16
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. fuse from the power transformer.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from the magnetron.
4. Remove one (1) screw holding capacitor holder to the
oven cavity back plate.
5. Disconnect the filament lead of the power transformer
from the H.V. capacitor.
6. Remove one (1) screw holding earth side terminal of high
voltage rectifier assembly, and remove capacitor holder.
7. Disconnect all the leads and terminals of high voltage
rectifier assembly from high voltage capacitor.
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)
8. Disconnect the H.V. fuse from the high voltage capacitor.
9. Now H.V. rectifier assembly, H.V. fuse and H.V. ca-
pacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE REC-
TIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS SE-
CURELY FIXED TO THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGE
RECTIFIER. WHEN REPLACING IT, RE-
PLACE HIGH VOLTAGE RECTIFIER AS-
SEMBLY.
Terminal
Push
Pull down
1
2
Lever
Positive lock®
connector
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the magnetron.
3. Carefully remove the three (3) screws holding the
magnetron to the waveguide flange.
4. Lift up magnetron with care so that the magnetron
antenna is not hit by any metal object around antenna.
5. Now, the magnetron is free.
Re-install
1. Re-install the magnetron to the waveguide flange with
MAGNETRON REPLACEMENT
three (3) screws.
2. Re-connect the wire leads to the magnetron. Refer to
"PICTORIAL DIAGRAM".
3. Re-install the outer case and check that the oven is
operating properly.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
®
 connector.
3. Pull down on the positive lock
®
 connector.
CAUTION: WHEN CONNECTING THE POSITIVE
LOCK
®
 CONNECTORS TO THE TERMI-
NALS, INSTALL THE POSITIVE LOCK
®
 SO
THAT THE LEVER FACES YOU
POSITIVE LOCK
®
  CONNECTOR (NO-CASE TYPE) REMOVAL
Figure C-1.  Positive lock
®
 connector
1. CARRY OUT 3D CHECKS.
2. Disconnect the leads from the control unit and the timer
motor.
3. Remove the one (1) screw holding the chassis support
to the front plate of the oven cavity.
CONTROL PANEL ASSEMBLY REMOVAL
4. Remove the chassis support from the oven.
5. Lift up the control panel and release it from the oven
cavity.
6. Now, the control panel assembly is free.
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the single (1) screw holding the green/yellow
wire to the oven cavity.
3. Disconnect the leads of the power supply cord from the
noise filter, referring to the Figure C-2 (a).
4. Release the moulding cord stopper of the power supply
cord from the square hole of the oven cavity back plate,
POWER SUPPLY CORD REPLACEMENT
referring to the Figure C-2 (b).
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 rear cabinet, referring to the
Figure C-2 (b).
R-206(G)
R-206(SL)
R-206(W)
17
9. Remove the O-ring and washer from the turntable
motor.
10.Now, the turntable motor is free.
Re-install
1. Remove the any sharp edges on the turntable motor
cover and the bottom plate with the cutting pliers.
2. Re-install the O-ring.
3. Apply the grease (Shinetsu  silicone grease G-420 of
Sinetsu Chemical Co. Ltd. or Toray Silicone grease
SH-14 of Toray Silicone Co., Ltd.) to the O-ring and the
base of the turntable motor shaft as shown in Figure C-
4.
4. Re-install the turntable motor with the O-ring and
washer  to the oven cavity with the single (1) screw.
5. Re-connect the wire leads to the turntable motor.
6. Insert the tab of the turntable motor cover into the hole
of the bottom plate as shown in Figure C-3.
7. Re-install the turntable motor cover to the bottom plate
w i t h   o n e   ( 1 )   s c r e w   X H T S D 4 0 P 0 8 R V 0   o r
XFPSD40P08K00 as shown in Figure C-3.
2. Install the earth wire lead of power supply cord and the
earth angle to the oven cavity with one (1) screw and
tight the screw.
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable and turntable support from the
oven cavity.
3. Turn the oven over.
4. Cut the four (4) bridges holding the turntable motor
cover to the bottom plate with the cutting pliers as
shown in Figure C-3.
CAUTION: DO NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING
THE BRIDGES. BECAUSE IT WILL DAM-
AGE THE WIRE LEADS OF THE MOTOR
AND IT IS DIFFICULT TO REMOVE IT OUT
OF THE OVEN.
5. Remove the turntable motor cover from the bottom
plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the single (1) screw holding the turntable
motor to the oven cavity.
8. Remove the turntable motor from the oven cavity.
3. Connect the brown and blue wire leads of power supply
cord to the noise filter correctly, referring to the Pictorial
Diagram.
TURNTABLE MOTOR REPLACEMENT
Figure C-2 (a). Power Supply Cord Replacement
Figure C-2 (b) Power Supply Cord Replacement
Power Supply 
Cord
Oven Cavity 
Back Plate
Square 
Hole
Moulding
Cord Stopper
Power Supply Cord
Oven Cavity 
Back Plate
Screw
Green/Yelow
Wire
Brown Wire
Fuse
Blue Wire
Noise Filter
Figure C-3. Turntable Motor Cover
Figure C-4.  Washer and O-ring Installation and
Grease Applying.
FAN MOTOR REPLACEMENT
Bottom Plate
Bridges
Turnrable
Motor Cover
Tab
Hole
Cutting Pliers
Screw; 
XHTSD40P08RV0
 or
            
XFPSD40P08K00
Washer
O-ring
Base of turntable
motor shaft
Turntable motor
O-ring
Washer
Apply the 
grease hear
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove the one (1) screw holding the chassis support
to the oven cavity front plate.
4. Remove the chassis support .
5. Release the filament lead of the power transformer and
the H.V. wire from the fan duct.
6. Remove the one (1) screw holding the light mounting
plate to the oven cavity.
7. Release the wire leads (to the oven lamp) from the hole
of the fan duct.
8. Remove the one (1) screw holding the fan duct to the
waveguide flange.
9. Release the fan motor assembly from the oven cavity.
10.Remove the fan blade from the fan motor shaft accord-
ing to the following procedure.
R-206(G)
R-206(SL)
R-206(W)
18
11.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 stator of the fan
motor. Because the rotor is easy to be shaven
by pliers and  metal pieces may be produced.
• Do not touch the pliers to the coil of the fan
motor because the coil may be cut or injured.
• Do not disfigure the bracket by touching with
the pliers.
12.Remove the fan blade assembly from the shaft of the
fan motor by pulling and rotating the fan blade with your
hand.
13.Now, the fan blade will be free.
CAUTION:
• Do not re-use the removed fan blade be-
cause the hole (for shaft) may be larger than
normal.
14. Remove the two (2) screws holding the fan motor to
the fan duct.
15. Now, the fan motor is free.
INSTALLATION
1.
Install the fan motor to the fan duct with the two (2)
screws.
2.
Install the fan blade to the fan motor shaft according
to the following procedure.
3.
Hold the center of the bracket which supports the
shaft of the fan motor on the flat table.
4.
Apply the screw lock tight into the hole (for shaft) of
the fan blade.
5.
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 strongly when installed
because the bracket may be transformed.
• Make sure that the fan blade rotates smooth
after installed.
• Make sure that the axis of the shaft is not
slanted.
6.
Install the fan motor assembly to the oven cavity by
fitting the tabs of the fan duct into the holes of the oven
cavity and the waveguide flange.
7.
Re-install the light mounting plate to the oven cavity
with the one (1) screw.
8.
Insert the end of the chassis support into the slit of the
oven cavity rear cabinet.
9.
Re-install the chassis support to the oven cavity front
plate with the one (1) screw.
10. Install the filament lead and the H.V. wire into the hole
of the fan duct .
11. Re-install the wire leads (to the oven lamp) to the hole
of the fan duct.
12. Connect the wire leads to the fan motor, referring to
the pictorial diagram.
MONITORED LATCH SWITCH, LATCH SWITCH AND MONITOR SWITCH REMOVAL
Gap
Rotor
Bracket
Stator
Groove joint pliers
Coil
Shaft
Axis
Stator
Rotor
These are the positions 
that should be pinched 
with pliers.
Shaft
Table
Center of
bracket
Side View
Rear View
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from the switches and control
panel.
3. Remove the control panel assembly from the oven
cavity front flange. Refer to chapter "CONTROL PANEL
ASSEMBLY REMOVAL".
4. Remove two (2) screws holding latch hook to oven
flange.
5. Remove latch hook assembly from oven flange.
6. To remove the monitored latch switch.
6-1. Pull out the monitored latch switch from the latch
hook, by pushing outward on the tab that is holding
the switch. But the switch will be caught by the bar of
the latch hook.
6-2. Then pull out the switch while pushing the plunger of
the switch again.
6-3. Now the  monitored latch switch is free.
7. To remove the monitor switch or latch switch.
7-1. With pushing outward on the tab that is holding the
switch, turn the switch so that the pole is an axis.
7-2. Pull out the switch from the latch hook. Do not break
the pole or tab of the latch hook.
7-3. 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 latch switch is in the upper
position.
2. Re-connect wire leads to each switch. Refer to chapter
"Pictorial Diagram".
3. Secure latch hook (with two (2) mounting screws) to
oven 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".
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