DOWNLOAD Sharp R-86STMA (serv.man11) Service Manual ↓ Size: 266.46 KB | Pages: 7 in PDF or view online for FREE

Model
R-86STMA (serv.man11)
Pages
7
Size
266.46 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Component Replacement And Adjustment Procedure
File
r-86stma-sm11.pdf
Date

Sharp R-86STMA (serv.man11) Service Manual ▷ View online

R86STMA
11 – 2
[3] HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament lead of the high voltage transformer and
the high voltage transformer secondary wire from the high voltage
capacitor.
3. Remove one (1) screw holding earth side terminal of the high volt-
age rectifier assembly.
4. Remove one (1) screw holding fan duct to the oven cavity rear
plate.
5. Remove one (1) screw holding capacitor holder to the oven cavity
rear plate.
6. Release the capacitor holder from the fan duct.
7. Remove the high voltage capacitor from the capacitor holder.
8. Disconnect the high voltage rectifier assembly from the high volt-
age capacitor.
9. Now, the high voltage rectifier assembly and the high voltage
capacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER
ASSEMBLY, ENSURE THAT THE CATHODE (EARTH)
CONNECTION IS SECURELY FIXED TO THE CAPACI-
TOR HOLDER WITH AN EARTHING SCREW.
[4] HIGH VOLTAGE TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament leads of high voltage transformer from high
voltage capacitor and the magnetron.
3. Disconnect the H.V. wire from the magnetron.
4. Disconnect the high voltage transformer secondary wire from the
high voltage capacitor.
5. Disconnect the main wire harness from the high voltage trans-
former.
6. Remove the two (2) screws holding the transformer to the base
plate.
7. Remove the transformer.
8. Now, the high voltage transformer is free.
[5] MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire and filament lead of the transformer from
the magnetron.
3. Remove the one (1) screw holding the chassis support to the mag-
netron.
4. Move the air intake duct to left.
5. Carefully remove four (4) screws holding the magnetron to the
waveguide. When removing the screws hold the magnetron to pre-
vent it from falling.
6. Remove the magnetron from the waveguide with care so the mag-
netron antenna is not hit by any metal object around the antenna.
CAUTION: CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND THE MAG-
NETRON MOUNTING SCREWS ARE TIGHTENED
SECURELY.
[6] FAN MOTOR REPLACEMENT
1. 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 magne-
tron.
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 according to the fol-
lowing procedure.
i)
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.
ii) Remove the fan blade assembly from the shaft of the fan motor
by pulling and rotating the fan blade with your hand.
iii) Now, the fan blade is free.
CAUTION: Do not reuse the removed fan blade as the fixing hole may
be oversize.
13.Remove the two (2) screws holding the fan motor to the fan duct.
14.Now, the fan motor is free.
2. 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.
i)
Hold the centre of the bracket which supports the shaft of the
fan motor on a flat table.
ii) Apply the screw lock tight into the hole (for shaft) of the fan
blade.
iii) 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.
R86STMA
11 – 3
• 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. Reinstall the chassis support to the oven cavity with the one (1)
screw.
7. Refit the one(1) screw to secure the chassis support to the magne-
tron.
8. Install the noise filter to the fan duct and the chassis support with
the one (1) screw.
9. Reconnect the wire leads to the fan motor.
[7] TURNTABLE MOTOR REPLACEMENT
1. REMOVAL
1. Disconnect the oven from the power 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-1(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 DIFFICULT 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 turnta-
ble 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.
2. REINSTALLATION
1. Remove the any sharp edges on the turntable motor cover and the
base plate with the cutting pliers.
2. Reinstall 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. Reconnect 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-1(b).
6. Reinstall the turntable motor cover to the base plate with the screw
(XHTS740P08RV0) as shown in Figure C-1(b).
[8] 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.
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
Rear View
Side View
Screw; -
XHTS740P08RV0
Turntable motor cover
Base plate
Tabs
Slits
Cutting pliers
Bridges
Bridges
Turntable motor -
cover
Figure C-1(a) Turntable Motor Cover Replacement
Figure C-1(b) Turntable Motor Cover Reinstallation
R86STMA
11 – 4
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.
[9] 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 CONNECTING THE POSITIVE LOCK
 CONNEC-
TORS TO THE TERMINALS, CONNECT THE POSITIVE
LOCK
 SO THAT THE LEVER FACES YOU.
Figure C-1. Positive lock
 connector
[10] OVEN LAMP REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the wire leads as Positive lock
 connector removal above.
3. Lift up the oven lamp from its retaining clips.
4. Now, the oven lamp is free.
[11] POWER SUPPLY CORD REPLACEMENT
1. REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the green/yellow wire to the cav-
ity 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.
Figure C-4 (a) Power Supply Cord Replacement
2. REINSTALLATION
1. Insert the moulding cord stopper of power supply cord into the
square hole of the cavity back plate, 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.
Figure C-4(b). Power Supply Cord Replacement
[12] TOP HEATING ELEMENTS 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) 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.
Terminal
Push
Pull down
1
2
Lever
Positive lock¨
connector
Figure C-1. Positive lock, connector
Lock
Socket
Bulb
Oven lamp
Power supply cord
Green/ Yellow-
wire
Brown wire
Oven cavity back plate
Blue wire
Noise filter
Screw
L
TP
F 8 A
TL
RED
20
A
WHT
N
POWER
SUPPLY CORD
MOULDING
CORD STOPPER
OVEN CAVITY
BACK PLATE
SQUARE HOLE
R86STMA
11 – 5
[13] BOTTOM HEATING ELEMENTS REMOVAL
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 pack-
ing to the bottom heater.
5. Remove the heater cover and the heater packing from the bottom
heating element.
6. Remove the two(2) nuts holding the bottom heating element to the
oven cavity.
7. Remove the bottom heating element from the oven cavity.
[14] CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads and the connectors from the control unit.
3. Remove the one (1) screw holding the control panel assembly to
the oven cavity front plate.
4. Lift up the control panel assembly and pull it forward.
Now the control panel assembly is free.
[15] GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT
1. REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly, referring to chapter of CON-
TROL PANEL ASSEMBLY REMOVAL.
3. Disconnect the ribbon cable of the membrane switch from the con-
nector (CN-G) on the control unit.
4. Tear away the graphic sheet from the control panel frame.
5. Tear away the membrane switch from the control panel frame.
2. REINSTALL
1. Remove remaining adhesive on the control panel frame surfaces
with a soft cloth soaked in alcohol.
2. Tear the backing paper from the new membrane switch.
3. Insert the ribbon cable of the membrane switch into the slit of the
control panel frame.
4. Adjust the upper edge and right edge of the membrane switch to
the small depression on the surface of the control panel frame. 
5. Attach the membrane switch to the control panel frame by rubbing
with a soft cloth not to scratch.
6. Tear the backing paper from the new graphic sheet.
7. Adjust the upper edge and right edge of the graphic sheet to the
large depression on the surface of the control panel frame. 
8. Attach the graphic sheet to the control panel frame by rubbing with
a soft cloth not to scratch.
9. Connect the ribbon cable of the membrane switch to the connector
(CN-G) on the control unit.
 Figure C-5. Graphic Sheet and Membrane Switch Replacement
[16] MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to “CONTROL
PANEL ASSEMBLY REMOVAL”.
3. Remove the open lever from the oven cavity front plate by remov-
ing the control panel assembly.
4. Disconnect the leads from all switches.
5. Remove the two (2) screws holding the latch hook to the oven cav-
ity.
6. Remove the latch hook.
7. Remove the switch(es) from the latch hook by pushing the retaining
tab backwards slightly and turning the switch(es) on the post.
8. Now the switch(es) is free
Figure C-5. Switches
Small depression
Control panel frame
Slit
Membrane switch
Ribbon cable
Large
depression
Graphic sheet
MONITOR SWITCH
STOP SWITCH
MONITORED
LATCH SWITCH
TAB
TAB
Post
Post
Post
TAB
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  • Here you can View online or download the Service Manual for the Sharp R-86STMA (serv.man11) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp R-86STMA (serv.man11) Microwave Oven. Information contained in Sharp R-86STMA (serv.man11) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.