Sharp R-230HW Service Manual - Page 28

R-203HW R-220HW R-230HW Re-install 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. Re-connect wire leads to each switch. Refer to pictorial diagram. 3. Secure latch hook (with two (2) mounting screws) to oven flange. 4. Install the switch lever to the oven cavity 5. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure. DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH 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. After adjustment, check the following. 1. In and out play of door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face. Then check lower portion of the latch hook, pushing and pulling lower portion of the door toward the oven face. Both results (play in the door) should be less than 0.5mm. 2. The door sensing switch and secondary interlock switch interrupt the circuit before the door can be opened. 3. Monitor switch contacts close when door is opened. 4. Re-install outer case and check for microwave leakage around door with an approved microwave survey meter. (Refer to Microwave Measurement Procedure.) Latch Heads Latch Hook Door Sensing Switch Door Monitor Switch Switch Lever Secondary Interlock Switch Figure C-4. Latch Switch Adjustments DOOR REPLACEMENT REMOVAL 1. Disconnect the power supply cord. 2. Open the door slightly. 3. Insert a putty knife (thickness of about 0.5mm) into the gap between the choke cover and corner portion of door panel as shown in Figure C-5 to free engaging parts. 4. Pry the choke cover by inserting a putty knife in order shown in figure C-5. 5. Release choke cover from door panel. 6. Now choke cover is free. 7. Release two (2) pins of door panel from two (2) holes of upper and lower oven hinges by lifting up. 8. Now, door panel is free from oven cavity. 9. Release door panel from ten (10) tabs of door frame and remove door frame by sliding the door panel downward. 10.Now, door panel with sealer film is free. 11.Tear sealer film from door panel. 12.Now, door panel is free. 13.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch NOTE: When carrying out any repair to the door, do not head. bend or warp the slit choke (tabs on the door 14.Now, latch head and latch spring are free. panel assembly) to prevent microwave leakage. 15.Remove door screen from door frame. 8 Choke Cover 7 6 9 10 11 16.Now, door screen is free. RE-INSTALL 1. Re-install door screen to door frame. 5 1 2 2. Re-install latch spring to the head. Re-install latch spring to the door frame. Re-install latch head to the door frame. 3 4 Putty Knife 3. Re-install door panel to door frame by fitting ten (10) tabs Door Frame of door frame to ten (10) holes of door panel. 4. Put sealer film on door panel. Refer to "Sealer Film" and figure C-7, on how to handle the new film. Figure C-5. Door Disassembly 26