Sharp R-340A, Service Manual

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R-340A
20
Connector
Power unit
CPU unit
Solder
These should be parallel
Figure C-3. Side view of CPU unit and Power unit
Handle the CPU unit carefully so that the ribbon
cable does not come off. Because the ribbon cable
is sticked on the LCD and the printed wiring board
only by heated paste.
Printed wiring board
of CPU unit
Liquid Crystal
Display (LCD)
Ribbon cable
Figure C-4. CPU unit
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from panel components.
3. Make one (1) tab of the oven cavity front plate straight
holding the control panel assembly to the oven flange.
4. Slide the control panel assembly upward and remove it.
5. Now, individual components can be removed.
NOTE: 1. Before attaching a new key unit, wipe off
remaining adhesive on the control panel frame
surfaces completely with a soft cloth soaked in
alcohol.
2. When attaching the key unit to the control panel
frame, adjust the upper edge and right edge of
the key unit to the correct position of control
panel frame.
3. Stick the key unit firmly to the control panel
frame by rubbing with soft cloth not to scratch.
CPU UNIT AND POWER UNIT
NOTE: When soldering the CPU unit and the power unit,
make sure both the CPU unit and power unit are
parallel, as shown figure C-3.
CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Bend the tab of the partition angle holding the lamp
socket.
3. Lift up the oven lamp socket.
4. Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket with
the small flat type screw driver.
5. Now, the oven lamp socket is free.
OVEN LAMP AND LAMP SOCKET REMOVAL
Oven lamp
socket
Terminal
Wire lead
Terminal hole
Flate type small
screw driver
Figure C-5. Oven lamp socket
TURNTABLE MOTOR REMOVAL
1. Disconnect oven from power supply.
2. Remove turntable and turntable support from oven
cavity.
3. Lay the oven on it's backside. Remove the turntable
motor cover by snipping off the material in four corner.
4. Where the corners have been snipped off bend corner
areas flat. No sharp edge must be evident after removal
of the turntable motor cover.
5. Disconnect wire leads from turntable motor.
(See "Positive lock connector removal")
6. Remove two (2) screws holding turntable motor to oven
cavity.
7. Now the turntable motor is free.
8. After replacement use the one (1) screw to fit the
turntable motor cover.
NOTE: The one (1) screw to fit the turntable motor cover
should be XFPSD40P12K00, XFPSD40P10K00
or XFPSD40P08K00.
COOLING FAN MOTOR REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove two (2) screws holding the chassis support to
magnetron and oven cavity front plate. And remove
chassis support.
4. Release the snap of the main wire harness from the fan
duct.
5. Remove two (2) screws holding the fan duct assembly
to the oven cavity top and front plates.
6. Release the main wire harness from the hole of the fan
duct.
7. Release the fan duct from the waveguide flange.
8. Release the fan duct assembly from the oven cavity.
9. Remove the fan blade from the fan motor shaft according
the following procedure.
1) Hold the edge of the rotor of the fan motor by using a
pair of grove 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 easily 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.