Sharp R-204EWA Service Manual - Page 27

R-204EWA CAUTION: • Make sure that no metal pieces enter the gap between the rotor and the stator of the fan motor. Because the rotor is easily damaged 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 damaged. • Do not disfigure the bracket by pinching with the pliers. 14.Remove the fan blade assembly from the shaft of the fan motor by pulling and rotating the fan blade with your hand. 15.Now, the fan blade will be free. CAUTION: • Do not re-use the removed fan blade because the hole (for shaft) may be larger than normal. 16.Remove the two (2) screws holding the fan motor to the fan duct. 17.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 to the following procedure. 3. Hold the center of the bracket which supports the shaft of the fan motor on the flat table. 4. Apply the screw lock tight into the hole (for shaft) of the fan blade. Coil Groove joint pliers 5. 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. 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. 6. Install the fan motor assembly to the oven cavity by fitting the tabs of the fan duct into the holes of the oven cavity and the waveguide flange. 7. Hold the fan duct to the waveguide flange with the one (1) screw. 8. Re-install the light mounting plate to the oven cavity with the one (1) screw. 9. Insert the end of the chassis support into the slit of the oven cavity rear cabinet. 10.Re-install the chassis support to the oven cavity front plate with the one (1) screw. 11.Install the filament lead and the H.V. wire into the hole of the fan duct . 12.Re-install the wire leads (to the oven lamp) to the hole of the fan duct. 13.Connect the wire leads to the fan motor, referring to the pictorial diagram. 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 DOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH 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. Disconnect wire leads from the switches and control panel. 5. Remove the control panel assembly from the oven cavity front flange. Refer to chapter "CONTROL PANEL ASSEMBLY REMOVAL" 6. Remove two (2) screws holding latch hook to oven flange. 7. Remove latch hook assembly from oven flange. 8. To remove the secondary interlock switch. 8-1. Pull out the secondary interlock switch from the latch hook, by pushing outward on the tab that is holding the switch. But the switch will be caught by the bar of the latch hook. 8-2. Then pull out the switch while pushing the plunger of the switch again. 8-3. Now the secondary interlock switch is free. 9. To remove the monitor switch or door sensing switch. 9-1. Push outward on the tab that is holding the switch, and turn the switch so that the pole is an axis. 9-2. Pull out the switch from the latch hook. Do not break the pole or tab of the latch hook. 9-3. Now the switch is free. Reinstallation 1. Re-install each switch in its place. The secondary interlock switch is in the lower position and the monitor switch is in the middle position. The door sensing switch is in the upper position. 2. Re-connect wire leads to each switch. Refer to chapter "Pictorial Diagram". 25