Cpu Unit Circuit - Sharp R-380D Service Manual

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
NOTE: 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.
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.
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.
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove the magnetron and the chassis support from
the waveguide, referring to "MAGNETRON REMOVAL".
4. Release the snap of the main wire harness from the fan
duct.
5. Remove one (1) screw holding the fan duct assembly
to the oven cavity.
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.
OVEN LAMP AND LAMP SOCKET REMOVAL
TURNTABLE MOTOR REMOVAL
COOLING FAN MOTOR REMOVAL
Ribbon cable
Figure C-2. CPU unit
Terminal
Wire lead
Flat type small
screw driver
Figure C-3. Oven lamp socket
(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 XHTSD40P08RV0.
* Do not disfigure 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 reuse the removed fan blade because the
hole (for shaft) may be larger than normal.
10.Remove the two (2) screws holding the fan motor to the
fan duct.
11.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 the
following procedure.
1) Hold the center of the bracket which supports the shaft
of the fan motor on the 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.
23
Oven lamp
socket
Terminal hole
R-380D