Component Replacement And Adjustment Procedure; Control Panel Assembly Removal; Side View Of Cpu Unit And Power Unit; Cpu Unit And Power Unit - Sharp R-310AK Supplemental Service Manual

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE.
DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING
AFTER REMOVING OUTER CASE.
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from the door sensing switch and the
oven cavity front flange.
4. Disconnect the wire leads from panel components.
5. Make one (1) tab of the oven cavity front plate straight
holding the control panel assembly to the oven flange.
6. Slide the control panel assembly upward and remove it.
7. 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-9.
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 voltage capacitor and High voltage rectifier assembly.
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Weveguide flange, Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch, Switch lever, Open button.
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.

CONTROL PANEL ASSEMBLY REMOVAL

WARNING FOR WIRING
Solder
CPU unit
Connector
Figure C-9. 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.
Ribbon cable
Figure C-10. CPU unit
9
R-310AK
R-330AK
R-330AW
These should be parallel
Power unit