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Sears 721.67902600 Manual 

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Sears 721.67902600 User Manual
Sears 721.67902600 User Guide
Sears 721.67902600 Online Manual

Text of Sears 721.67902600 User Guide:

  • Sears 721.67902600, 4-3 OPERATING SEQUENCE 9. SENSOR TOUCH COOKING • Sensor cook and reheat • Sensor Popcorn 10. AUTO DEFROST 11. EXPRESS DEFROST 12. AUTO BAKE/ROAST 13. CONVECTION TO PREHEAT TO COOK(After preheating) 14. COMBINATION Stop/ Clear Sensor Cook Sensor Reheat Select Sensor menu Stop/ Clear Convection Select Temperature Start/Pause Stop/ Clear Combi Start/Pause Cooking Time Cooking Time Start/Pause Stop/ Clear Auto Defrost Select Food category Enter the Weight Start/Pause Stop/ Clear Express Defrost Select Food Category Start/Pause Stop/ Clear Auto Defrost Number Start/Pause Stop/

  • Sears 721.67902600, 5-13 COMPONENTS TEST PROCEDURE RESULTS CIRCULATION MOTOR (Wire leads removed) TURNTABLE MOTOR (Wire leads removed) DAMPER MOTOR (Wire leads removed) THERMISTOR (Disconnect the 2 pin connector from P.C.B.) RELAY 2, 3, 4 OF P.C.B. (leadwires removed.) RY2 : Microwave RY4 : Convection Measure the resistance. (Multi-meter scale : R x 1) Measure the resistance. (Ohm-meter scale : R x 1000) Measure the resistance. (Ohm-meter scale : R x 1000) Normal : Approx. 29.5 ohm Abnormal : Infinite or several ohm. Normal : Approx. 3.48 Kohm Abnormal : Infinite or several ohm. Nor

  • 5-14 TROUBLE SHOOTING CAUTIONS 1. Check grounding before checking for trouble. 2. Be careful of the high voltage circuit. 3. Discharge the high voltage capacitor. (See page 2-1) 4. When checking the continuity of the switches or of the high voltage transformer, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may resu

  • Sears 721.67902600, 5-16 CONDITION CHECK RESULT CAUSE REMEDY 1. Fuse blows. Continuity. No continuity. Continuity. Shorted contact at the primary switch. Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly. No continuity. Normal. Defective high voltage capacitor. Replace high voltage capacitor. Fuse blows again Defective high volt- age transformer. Replace high volt- age transformer. Malfunction of the monitor switch. Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly. Check continuity of monit

  • Sears 721.67902600, SPECIFICATIONS 1-1 Rated Power Consumption ---------------------------------- 1500W Output Microwave ------------------------------------------------------ 1000W (*IEC60705 Rating standard) Adjustable 100W through 1000W, 10 steps Convection ------------------------------------------------------ 1500W Combination ---------------------------------------------------- 1500W Frequency --------------------------------------------------------- 2450 MHz Power Supply ------------------------------------------

  • Sears 721.67902600, 5-19 CONDITION CHECK RESULT CAUSE REMEDY (TROUBLE 6) Convection oven does not operate at all or convection cook is bad. Convection indicator light but oven does not go into cook cycle when START pad is touched. Temperature in the oven cavity is lower or higher than preset. Abnormal Normal No continuity. Check the connection between P.C.B. assembly and headwire connector. Defective Relay 4 or 6. Replace Relay 4 or 6. Loose connection. Connect them tightly. Check the Relay 4 or 6 of P.C.B. assembly . Check the Relay 4 or 6 of P.C.B. assembly . Check the convection heater element. Abnormal Normal Defective Rel

  • Sears 721.67902600, INSTALLATIONS 3-1 INSTALLING 1. Empty the microwave oven and clean inside it with a soft, damp cloth. Check for damage such as misaligned door, damage around the door, dents inside the cavity, or on the exterior. 2. Put the oven on a counter, table, or shelf at least 39.4 inches(100cm) from floor that is strong enough to hold the oven and the food and utensils you put in it. (The control panel side of the oven is the heavy side. Use care when handling.) 3. Do not block the vent and the air intake openings. Blocking vent or air intake openings can cause damage to the oven and poor cooking resul

  • Sears 721.67902600, A. PRIMARY INTERLOCK SWITCH TEST When the door handle is depressed slowly with the door closed, an audible click should be heard at the same time or successively at intervals. When the door handle is released slowly, the latches should activate the switches with an audible click. If the latches do not activate the switches when the door is closed, the switches should be a adjusted in accordance with the adjustment procedure. Disconnect the wire lead from the primary switch. Connect the ohm meter leads to the common (COM) and normally open (NO) terminal of the switch. The meter should

  • NECESSARY TOOLS Tools normally used for TV servicing are sufficient. Tools needed for service are listed below. • Diagonal pliers • Long nose pliers • Phillips screwdriver • Flat blade screwdriver • Wrench (size 2 inches(5mm)) • Nutdriver (size 2 inches(5mm)) • Adjustable wrench • Soldering iron • Solder • Vinyl insulation tape • Polishing cloth NECESSA

  • Sears 721.67902600, 5-9 COMPONENT TEST PROCEDURE CAUTIONS 1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER. (SEE PAGE 2-1) 2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN. COMPONENTS TEST PROCEDURE RESULTS HIGH VOLTAGE TRANSFORMER (Wire leads removed) MAGNETRON (Wire leads removed) 1. Measure the resistance. (Ohm-meter scale: Rx1 and Rx100) • Primary winding • Secondary winding • Filament wind

  • Sears 721.67902600, D. P.C.B ASSEMBLY REMOVAL 1) Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.) 2) Remove screws which hold the P.C.B. SUB Assembly to the control panel. 3) Pull P.C.B. SUB Assembly carefully from the control panel. E. DOOR ASSEMBLY / REMOVAL 1) Open the door. 2) Remove the choke cover very carefully with a flat-blade screwdriver. CAUTION: Be careful not to damage door seal plate by screwdriver. 3) Lift up and pull the door. NOTE: 1. After replacing the door, be sure to check that the primary switch, monitor switch, and secondary switch operate normally. 2. After

  • Sears 721.67902600, 5-17 (TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched. (TROUBLE 4) Oven seems to be operating but little heat is produced in oven load. CONDITION CHECK RESULT CAUSE REMEDY 1.Setting time does not count down when touching START pad. 2. Fan motor or oven lamp do not turn on. No continuity. Continuity. Continuity No continuity Check the con- nection between CN1 connector and P.C.B assembly. Defective secondary switch. Replace secondary switch

  • Sears 721.67902600, 5-3 A. OUTER CASE REMOVAL 1) Disconnect the power supply cord from the outlet. 2) Remove the screws from the rear of the case. The outer case must be moved backward to be lifted off. B. POWER SUPPLY CORD REMOVAL 1) Remove the outer case. 2) Disconnect two terminals, and remove one screw of the ground terminal. C. CONTROLLER ASSEMBLY REMOVAL 1) Open the door. 2) Remove the screws which hold the CONTROLLER assembly to the cavity and of the ground terminal. 3) Disconnect the leadwires from RELAY and connector of the P.C.B. SUB assembly. 4) Lift up and pull out CONTROLLER assembly carefully from the cavity. CAUTION: DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING (refer to p

  • Sears 721.67902600, MEASUREMENT WITH OUTER CASE REMOVED • When you replace the magnetron, measure for microwave energy leakage around the door view window, the exhaust opening, and air inlet opening before the outer case is installed and after all necessary components are replaced or adjusted. Special care should be taken in measuring the following parts. (Circled area of Fig. below) - Around the magnetron - The waveguide MEASUREMENT WITH A FULLY ASSEMBLED OVEN • After all components, including the outer case, a

  • Sears 721.67902600, 5-12 COMPONENTS TEST PROCEDURE RESULTS FUSE (Wire leads removed.) CONVECTION HEATER (Wire leads removed) MAGNETRON THERMOSTAT FAN MOTOR (Wire leads removed) Normal: Approx. 9.5 ohm (at 20~30°C) Normal: Approx. 49 ohm. Abnormal: Infinite or several ohm. Measure the resistance. (Multi-meter scale : R x 1) Measure the resistance. (Ohm-meter scale : R x 1) Check for continuity of the switch with a Multi-meter. Normal Abnormal NOTE: If the fuse is blown, check the primary, the secondary, and the monitor switches, H.V.D. and H.V.C. before replacing the fuse. If the fuse is blown by improper switch oper

  • CAUTION WARNING TO SERVICE TECHNICIANS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY a. Do not operate or allow the oven to be operated with the door open. b. Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary; (1) Interlock operat

  • OPERATING INSTRUCTIONS 4-1 FEATURES CONTROL PANEL Metal Rack Oven Front Plate Window Door Screen Door Seal Safety Interlock System Control Panel Display Window Glass Tray Rotating Ring 4 6 17 19 1 2 3 14 13 12 10 5 9 11 7 8 15 16 18 22 20 21 1. DISPLAY. The Display includes a clock and indicators to tell you time of day, cooking time settings and cooking function

  • Sears 721.67902600, CAUTIONS 2-1 • DO NOT operate on a 2-wire extension cord during repair and use. • NEVER TOUCH any oven components or wiring during operation. • BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. • For about 30 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must discharge the high voltage capacitor by shorting across the two terminals with an insulated screwdriver. • Remove your watches whenever working close to or replacing the Magnetron. • DO NOT touch any parts of the control panel circuit. A resulting static electric discharge may damage this P.C.B. • N

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