Sharp R-390B Service Manual page 23

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.
DISPLAY UNIT AND POWER UNIT
NOTE: When soldering the display unit and the power
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly from the oven,
referring to "CONTROL PANEL ASSEMBLY
REMOVAL".
3. Remove the five (5) screws holding the display unit and
the power unit to the control panel frame.
4. Remove the display unit and the power unit from the
control panel frame.
5. Remove the solder holding the tab (near capacitor
C11) of LCD vessel to the printed wiring board.
6. Make the four (4) tabs of LCD vessel straight.
7. Release the LCD vessel from the printed wiring board.
8. Now, the two (2) lamps LMP1 and LMP2 can be found.
9. Remove the solder holding the lamps LMP1 and LMP2
to the printed wiring board.
10.Now, the lamps LMP1 and LMP2 are free.
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 from the waveguide, referring
to "MAGNETRON REMOVAL".
4. Release the snap of the main wire harness from the fan
duct.
CONTROL PANEL ASSEMBLY REMOVAL
DISPLAY UNIT LAMPS REMOVAL
OVEN LAMP AND LAMP SOCKET REMOVAL
TURNTABLE MOTOR REMOVAL
COOLING FAN MOTOR REMOVAL
unit, make sure both the display unit and the power
unit are parallel, as shown figure C-3.
Display unit
Figure C-3. Side view of Display unit and Power unit
LCD
vessel
tab
Figure C-4. Back side view of display unit
Terminal
Wire lead
Figure C-5. Oven lamp socket
®
(See "Positive lock
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.
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.
21
Solder
These should be parallel
Connector Power unit
IC2
IC1
C11
Oven lamp
socket
Terminal hole
Flate type small
screw driver
connector removal")
R-390B
LCD
vessel
tab