Sharp R-231NW Service Manual - Page 28

2. INSTALLATION 1. Install the fan blade to the fan motor shaft according to the following procedure. 2. Hold the center of the bracket which supports the shaft of the fan motor on the flat table. 3. Apply the screw lock tight into the hole (for shaft) of the fan blade. 4. 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. R-231NW CAUTION: DO NOT HIT THE FAN BLADE STRONGLY WHEN INSTALLED BECAUSE THE BRACKET MAY BE TRANSFORMED. MAKE SURE THAT THE FAN BLADE ROTATES SMOOTH AFTER INSTALLED. MAKE SURE THAT THE AXIS OF THE SHAFT IS NOT SLANTED. 5. Install the fan motor assembly to the oven cavity back plate with two (2) screws. 6. Connect the wire leads to the magnetron and fan motor, referring to the pictorial diagram. Coil Groove joint pliers Shaft Stator Gap Bracket Rotor Rear View Shaft Axis Stator Rotor Side View These are the positions that should be pinched with pliers. Table Center of bracket [12] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL 1. REMOVAL 1. Disconnect the power supply cord and remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Remove the control panel assembly, referring to section of CONTROL PANEL ASSEMBLY REMOVAL. 5. Remove the switch lever from the oven cavity. 6. Disconnect wire leads from the switches. 7. Remove two (2) screws holding latch hook to oven flange. 8. Remove latch hook assembly from oven flange. 9. Push outward on the two (2) retaining tabs holding switch in place. 10. Switch is now free. 2. REINSTALL 1. Re-install each switch in its place. The secondary interlock/ monitor switches are in the lower position and the door sensing switch is in the upper position. 2. Secure latch hook (with two (2) mounting screws) to oven flange. 3. Re-connect wire leads to each switch. Refer to pictorial diagram. 4. Install the switch lever to the oven cavity. 5. Reinstall the control panel assembly to the oven cavity. 6. Reconnect wire leads to the control unity, referring to the pictorial diagram. 7. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure. [13] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT 1. Adjustment 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. If the door sensing switch, secondary interlock switch and monitor switch do not operate properly due to a misadjustment, the following adjustment should be made. 4. Loosen the two (2) screws holding latch hook to the oven cavity front flange. 5. With door closed, adjust latch hook by moving it back and forth, and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The vertical position of the latch hook should be adjusted so that the door sensing switch and secondary interlock switch are activated with the door closed. The horizontal position of the latch hook should be adjusted so that the plunger of the monitor switch is pressed with the door closed. 6. Secure the screws with washers firmly. 7. Check the operation of all switches. If each switch has not activated with the door closed, loosen screw and adjust the latch hook position. 11 - 5