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KitchenAid KHMS105E manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    LIT4317216 Printed in U.S.A. SER VICE MANUAL for the March, 1997 MICROW A VE OVEN HOOD COMBINA TION ( E Model Line)[...]

  • Page 2

    ii THIS MANUAL CONTAINS INFORMATION NECES- SARY FOR SERVICING THE KITCHENAID MICRO- WAVE OVEN HOOD COMBINATION , MODELS: KHMS105E KHMC107E THE MANUAL IS DESIGNED TO BE USED ONLY BY QUALIFIED SERVICE PERSONNEL. THE SERVICE INFORMATION IS ORGANIZED TO HELP YOU EAS- ILY FIND WHAT YOU NEED. CHECK YOUR LOCAL BUILDING CODE FOR THE PROPER MODE OF INSTALLA[...]

  • Page 3

    iii Original 03/97 Page iii Microwave Oven Hood Combo Service Manual — LIT 4317216 T ABLE OF CONTENTS Page Important Safety Information .............................................................................................................. v Theory Of Operation ...............................................................................[...]

  • Page 4

    iv Page Component Description & Testing .................................................................................................. 3 - 1 Important Safety Instructions ..................................................................................................... 3 - 1 The Thermal Fuses .............................................[...]

  • Page 5

    v Original 03/97 Page v Microwave Oven Hood Combo Service Manual — LIT 4317216 IMPORT ANT SAFETY INFORMA TION KITCHENAID ASSUMES NO RESPONSIBILITY FOR ANY REPAIRS MADE ON OUR PRODUCTS BY ANYONE OTHER THAN AUTHORIZED KITCHENAID SERVICE TECHNICIANS. Fire Hazard Do not obstruct the flow of ventilation air. Electrical Shock Hazard It is the customer?[...]

  • Page 6

    vi CAUTION W ARNING T O SERVICE TECHNICIANS • Proper operation of the microwave ovens requires that the magnetron be properly assembled to the waveguide and cavity. Never operate the magnetron unless it is properly installed. • Be sure the “RF” seal is not damaged, and assembled around the magnetron dome properly when installing the magnetr[...]

  • Page 7

    vii Original 03/97 Page vii Microwave Oven Hood Combo Service Manual — LIT 4317216 CAUTION: BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING, ALWAYS UNPLUG THE OVEN FROM ITS POWER SOURCE AND DISCHARGE THE CAPACITOR BY USING A 20,000-OHM DISCHARGE RESIS- TOR. OR USE AN INSULATED PLASTIC- HANDLE SCREWDRIVER AND SHORT ACROSS THE CAPACI- TOR TERMINALS. [...]

  • Page 8

    viii R.F . LEAKAGE TEST When checking for R.F. Ieakage, use an ap- proved R.F. measuring device to assure less than 4 mw/cm 2 emission at 5 cm distance with a maximum scan rate of 2.5 cm/second, in compliance with U.S. Government Department of Health, Education and Welfare 21 CFR1030, performance Standard for Microwave Ovens. A properly operating d[...]

  • Page 9

    Microwave Oven Hood Combo Service Manual — LIT 4317216 Page 1-1 1-1 Original 03/97 THEOR Y OF OPERA TION The microwave oven is powered by the 120- volt line. Whenever the door is closed and a cooking function is programmed through the control panel’s keypad, relay contacts on the control board close, and complete a circuit from the L1 side to t[...]

  • Page 10

    1-2 The normally-closed (N.C.) contacts of relay 4 provide a potential circuit for the Base Thermal Fuse (see the following strip circuit). If the base of the oven exceeds 133 ˚ F, the thermal fuse contacts close, and a circuit for the low-speed side of the blower motor is completed, which turns the motor on. The low-speed blower will operate unti[...]

  • Page 11

    Page 2-1 2-1 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 COMPONENT ACCESS • The Operating Control System Oven Light Socket Control Circuit Board Temperature Probe Socket Fan Motor Power Cord Blower Motor Capacitor Convection Heating Element Gas Sensor Synchronous Motor Cooktop Light Socket • The High Voltage Componen[...]

  • Page 12

    2-2 GENERAL REMOVING THE MICROW A VE OVEN & CABINET WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. CAUTION: Because of the weight and size of the microwave oven, two people are required to safely move and install it. Failure to do so c[...]

  • Page 13

    Page 2-3 2-3 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 POWER CORD POWER CORD COVER BASE PLATE RED WHITE (2) RED (2) WHITE COOKTOP LIGHT ASSEMBLY WIRING WIRES CABINET CABINET SCREW VENT GRILLE SCREWS (2) CABINET SCREWS VENT GRILLE BASE PLATE SCREWS (6) Removing The Cabinet[...]

  • Page 14

    2-4 THE PROTECTION CONTROL SYSTEM REMOVING THE OVEN DOOR WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. CAUTION: Because of the weight and size of the microwave oven, two people are required to safely move and install it. Failure to do so [...]

  • Page 15

    Page 2-5 2-5 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE DOOR CHOKE WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 1. Disconnect the electrical supply to the microwave oven. 2. Open the oven door. 3[...]

  • Page 16

    2-6 WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. REMOVING THE CONTROL P ANEL 1. Disconnect the electrical supply to the microwave oven. 2. Remove the two screws from the top of the cabinet for the vent grille and remove the grille (see t[...]

  • Page 17

    Page 2-7 2-7 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE LINE FUSE Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. WARNING 2. Remove the two screws from the top of the cabinet for the vent grille and remove [...]

  • Page 18

    2-8 REMOVING/ADJUSTING THE INTERLOCK SWITCHES WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 5. Remove the center screw from the fan cover and fold the cover back so you can access the switches (see the illustration below). 6. Remove the t[...]

  • Page 19

    Page 2-9 2-9 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 PRESS BODY IN THIS DIRECTION TO REMOVE SWITCH FROM HOUSING. 2. 1. RAISE THIS LOCKING ARM TO RELEASE SWITCH FROM HOUSING. 1. PUSH THIS LOCKING ARM BACK TO UNLOCK SWITCH. 2. ROTATE SWITCH ON THIS PIN AND REMOVE SWITCH FROM HOUSING. NOTE: THESE POSTS HOLD THE SWITCH I[...]

  • Page 20

    2-10 MAKING ADJUSTMENTS 1. If necessary, adjust the interlock switch housing so that the switches operate prop- erly. NOTE: The Interlock Monitor Switch provides an added safety check on the Primary and Secondary Interlock Switches. If the Primary and Secondary Interlock Switches allow the oven to operate with the door open, the Interlock Monitor S[...]

  • Page 21

    Page 2-11 2-11 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE BASE THERMAL FUSE WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 2. Remove the two screws from the top of the cabinet for the vent grille a[...]

  • Page 22

    2-12 REMOVING THE MAGNETRON THERMAL FUSE WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. Discharge the high voltage capacitor be- fore working inside the oven. Failure to do so could result in death or electrical shock. the grille (see the [...]

  • Page 23

    Page 2-13 2-13 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE CA VITY THERMAL FUSE 1. Disconnect the electrical supply to the microwave oven. 2. Remove the microwave oven from its mounting location (refer to page 2-2 for the procedure). 3. Remove the vent grille and the cabinet from the microwave oven (refer to[...]

  • Page 24

    2-14 REMOVING THE CONVECTION THERMIST OR WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 1. Disconnect the electrical supply to the microwave oven. 2. Remove the microwave oven from its mounting location (see page 2-2). 3. Remove the vent g[...]

  • Page 25

    Page 2-15 2-15 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 PHILLIPS SCREW SENSOR COVER CONVECTION THERMISTOR WHITE WIRES CAUTION: WHEN REPLACING THE THERMISTOR, DO NOT CUT AND SPLICE THE WHITE WIRES, OR AN IMPROPER SIGNAL WILL BE SENT FROM THE THERMISTOR TO THE MICROCOMPUTER BOARD BRACKETS CIRCULATION PULLEY COVER[...]

  • Page 26

    2-16 THE OPERA TING CONTROL SYSTEM WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. REMOVING THE OVEN LIGHT SOCKET 1. Disconnect the electrical supply to the microwave oven. 2. Remove the two screws from the top of the cabinet for the vent g[...]

  • Page 27

    Page 2-17 2-17 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE CONTROL CIRCUIT BOARD WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 1. Disconnect the electrical supply to the microwave oven. 2. Remove t[...]

  • Page 28

    2-18 FAN COVER COVER SCREW FOLD BACK FLAT WASHER HEX NUT BLUE WIRE BROWN WIRE TEMPERATURE PROBE SOCKET REMOVING THE TEMPERA TURE PROBE SOCKET 4. From the top and back of the control panel, lift the top locking tab and pull the top of the panel out slightly, then lift the bottom tabs of the panel out of the slots and pull it forward. Set the panel i[...]

  • Page 29

    Page 2-19 2-19 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE F AN MOT OR WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 2. Remove the microwave oven from its mounting location. 3. Remove the vent gril[...]

  • Page 30

    2-20 REMOVING THE POWER CORD WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. CAUTION: Because of the weight and size of the microwave oven, two people are required to safely move and install it. Failure to do so could result in personal inj[...]

  • Page 31

    Page 2-21 2-21 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE BLOWER MOT OR CAP ACIT OR 2. Remove the microwave oven from its mounting location (refer to page 2-2 for the procedure). 3. Remove the vent grille and the cabinet from the microwave oven (refer to page 2-2 for the procedure). 4. Disconnect the two wi[...]

  • Page 32

    2-22 REMOVING THE CONVECTION HEA TING ELEMENT WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 1. Disconnect the electrical supply to the microwave oven. 2. Remove the microwave oven from its mounting location (see page 2-2). 3. Remove the v[...]

  • Page 33

    Page 2-23 2-23 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 CONVECTION THERMISTOR TOP PLATE MOUNTING SCREWS BRACKETS CIRCULATION PULLEY COVER TOP PLATE CONVECTION HEATING ELEMENT YELLOW WIRES UNCLIP ELEMENT HERE HEATING ELEMENT HEATING ELEMENT MOUNTING SCREWS VIEWED FROM UNDER TOP PLATE GAS SENSOR SENSOR COVER[...]

  • Page 34

    2-24 REMOVING THE GAS SENSOR WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. Discharge the high voltage capacitor be- fore working inside the oven. Failure to do so could result in death or electrical shock. 1. Disconnect the electrical sup[...]

  • Page 35

    Page 2-25 2-25 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE SYNCHRONOUS MOT OR WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 3. Open the oven door and pry up the bottom panel and remove it from the [...]

  • Page 36

    2-26 REMOVING A COOKT OP LIGHT SOCKET WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. 2. Remove the base plate from the micro- wave oven (refer to page 2-2 for the pro- cedure). 3. Pull the connectors off the cooktop light socket terminals [...]

  • Page 37

    Page 2-27 2-27 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 THE HIGH VOL T AGE COMPONENTS The components for service in this section include the: Magnetron High Voltage Rectifier High Voltage Capacitor High Voltage Transformer The locations of the high voltage components are shown in the illustration below. To access the [...]

  • Page 38

    2-28 ACCESSING THE HIGH VOL T AGE COMPONENTS 3. Remove the vent grille, the cabinet, and base plate from the microwave oven (re- fer to page 2-2 for the procedure). 4. Remove the control panel from the micro- wave oven, unplug the wire connectors from the control board, and set the control panel aside (see page 2-17 for the proce- dure). 5. Unplug [...]

  • Page 39

    Page 2-29 2-29 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 REMOVING THE MAGNETRON WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. CAUTION: Because of the weight and size of the microwave oven, two people are requ[...]

  • Page 40

    2-30 REMOVING THE HIGH VOL T AGE RECTIFIER AND THE HIGH VOL T AGE CAP ACITOR WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. CAUTION: Because of the weight and size of the microwave oven, two people are required to safely move and install i[...]

  • Page 41

    Page 2-31 2-31 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 HIGH VOLTAGE CAPACITOR MOUNTING STRAP TAB & SLOT HIGH VOLTAGE RECTIFIER MOUNTING FLANGE RED WIRE INSULATED RED WIRE WHITE WIRE HV CAPACITOR SCREW Removing The High Voltage Rectifier & Capacitor[...]

  • Page 42

    2-32 REMOVING THE HIGH VOL T AGE TRANSFORMER WARNING Personal Injury Hazard Disconnect from the electrical supply be- fore servicing the unit. Failure to do so could result in death or electrical shock. CAUTION: Because of the weight and size of the microwave oven, two people are required to safely move and install it. Failure to do so could result[...]

  • Page 43

    Page 3-1 3-1 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 W arning T o Service T echnicians! To avoid possible exposure to microwave radiation or energy, visually check the oven for damage to the door and door seal before operating any oven. Use a microwave survey meter to check the amount of leakage before servicing. In [...]

  • Page 44

    3-2 KitchenAid microwave ovens have a monitoring system designed to assure proper operation of the safety interlock systems. The interlock monitor switch will immediately cause the oven fuse to blow if the door is opened and the primary door interlock switch and/or the secondary interlock switch contacts fail in a closed position. CAUTION: REPLACE [...]

  • Page 45

    Page 3-3 3-3 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 CAUTION • High voltages are present during the cook cycle. Extreme caution should be observed at all times. • Abrasive cleansers, steel-wool pads, gritty wash cloths, etc. can damage the control panel and the interior and exterior oven surfaces. Use a sponge wi[...]

  • Page 46

    3-4 THE THERMAL FUSES The base thermal fuse is located directly be- hind the control panel. It is a normally-open fuse that, when closed, activates the blower motor at a low speed. There are three thermal fuses in the OTR Microwave Oven. They are: the magnetron thermal fuse, the cavity thermal fuse, and the base thermal fuse. The magnetron and cavi[...]

  • Page 47

    Page 3-5 3-5 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 THE BLOWER MOT OR CAP ACIT OR TESTING 1. Set the ohmmeter to the R x 10K scale. 2. Measure across the capacitor ter- minals. The ohmmeter should indicate several ohms, then gradually re- turn to infinity . The blower motor capacitor is located directly behind the c[...]

  • Page 48

    3-6 THE GAS SENSOR TESTING 1. Set the ohmmeter to the R x 1 scale. 2. Remove the 3-pin connector from the control circuit board and mea- sure the resistance between the: a) Red & white wire terminals. You should measure 20 Ω @ 68 ˚ F. b) White & yellow wire terminals. You should measure infinity. The gas sensor is used during the “ Sen[...]

  • Page 49

    Page 3-7 3-7 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 thermistor signal going back to the microcom- puter causes the heater relay to open and close, and cycles the heating element on and off. NOTE: Verify that the heating element is work- ing correctly before replacing a thermistor. The convection thermistor is locate[...]

  • Page 50

    3-8 THE CONVECTION HEA TING ELEMENT and the heater relay on the microcomputer board. During a convection, or combination cooking cycle, the heater cycles on and off to maintain the programmed cavity temperature. The heating element surrounds the convec- tion fan blade and is not visible through the oven cavity. The 1400-watt convection heating elem[...]

  • Page 51

    Page 3-9 3-9 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 BLOWER MOTOR FAN MOTOR SYNCHRONOUS MOTOR Blower Motor — Removes smoke and odors from the kitchen cooking area through outside venting or recirculation. Synchronous Motor — Distributes microwave energy into the oven during microwave cooking. Fan Motor — Cools [...]

  • Page 52

    3-10 PROGRAMMING CHECKS If any of the switches are closed, you will see the following display: – f 2 – – f 1 – If the sensor is defective, or if the wires are not properly connected, you will see the following display: TOUCH P ANEL CONTINUITY TEST 1. Unplug the microwave oven ’ s power sup- ply cord. 2. Open the oven door. 3. Plug the pow[...]

  • Page 53

    Page 3-11 3-11 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 CONTROL PANEL MTG SCREW LOCKING TAB (LIFT TO RELEASE) REMOVING THE CONTROL P ANEL THINGS T O KNOW COMBINA TION BAKE The combination bake temperature range is 150 ˚ F to 450 ˚ F. The combination bake time will be limited to a maximum of 199-minutes, 99-seconds. [...]

  • Page 54

    3-12 CHARTS TEST PROCEDURE OR CORRECTION Shorted wire in power cord, wiring harness, or overload circuit. Line fuse blows when power cord is plugged into a wall receptacle. 1. Check wiring with ohm- meter for continuity. 2. Use separate 15- to 20- ampere circuit. 1. No power at wall plug. 1. Check fuse or breaker box. 2. Check wiring with ohm- mete[...]

  • Page 55

    Page 3-13 3-13 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 TEST PROCEDURE OR CORRECTION 1. High voltage transformer. Little or no heat is produced in the oven load. 1. Check the high voltage transformer. 2. Check the high voltage rectifier diode. 3. Check the high voltage capacitor. 4. Check the magnetron. 5. Check the p[...]

  • Page 56

    3-14 TEST PROCEDURE OR CORRECTION 1. Blower motor. 2. Control board. 3. Open or loose wiring in circuit to blower motor. Blower motor will not oper- ate. 1. Check blower motor. 2. Check control board. 3. Use ohmmeter to check continuity, and repair wiring. 1. Bulb burned out. 2. Control board. 3. Lamp sockets. 4. Open wiring between the above compo[...]

  • Page 57

    Page 3-15 3-15 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 TEST PROCEDURE OR CORRECTION 1. No power at wall plug. Console will not display data, or has incorrect data. 1. Check fuse or breaker box. 2. Replace line fuse. 3. Check thermal fuse. 4. Check magnetron ther- mal fuse. 5. Check interlock safety switches. Replace,[...]

  • Page 58

    3-16 CHECKING FOR MICROW A VE ENERGY LEAKAGE CAUTION On every service call, checks for microwave energy emission must be made according to the following manner. 1. Remove the cooking rack from the oven cavity, if the microwave oven is so equipped. 2. Place a 275 ML (9. oz.) glass of water in the center of the oven bottom. 3. Select “ HlGH ” coo[...]

  • Page 59

    Page 3-17 3-17 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 MAKING THE MEASUREMENTS Measuring The Oven With The Cabinet Installed MEASUREMENT NOTES: • When measuring for leakage, use the 2 " (5 cm ) spacer that is provided with the probe. • Leakage with the outer panels removed should be less than 5 mW/cm.sq . ?[...]

  • Page 60

    3-18 MEASURING MICROW A VE POWER OUTPUT USING THE IEC-705 RA TING ST ANDARD When determining the microwave oven ’ s power output using the IEC-705 rating standard, the following conditions must be met: • When making microwave power output mea- surements, the oven is supplied with its rated line voltage, and operated at its maxi- mum power outpu[...]

  • Page 61

    Page 3-19 3-19 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 TEST CHARTS TEST PROCEDURE RESULT COMPONENT 1. Set the ohmmeter to the R x 1 scale, and measure the: a) Primary winding. b) Secondary winding. c) Filament winding 2. Set the ohmmeter to its R x 1000 scale, and mea- sure the: a) Primary to ground. b) Filament to g[...]

  • Page 62

    3-20 TEST PROCEDURE RESULT COMPONENT Terminal-To-Terminal Set the ohmmeter to the R x 10 k scale, and measure the resistance across the capacitor terminals. High-Voltage Capacitor a) Normal - The meter indi- cates several ohms, then gradually returns to in- finity. b) Abnormal - The meter indicates infinity, or zero ohms (a short) immedi- ately. Te[...]

  • Page 63

    Page 3-21 3-21 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 Ambient Resistance Temp. ( ˚ F) Value 60 75.24 k Ω ( ± 11 k Ω ) 68 62.57 k Ω ( ± 8 k Ω ) 70 59.79 k Ω ( ± 8 k Ω ) 80 45.80 k Ω ( ± 7 k Ω ) 90 36.94 k Ω ( ± 6 k Ω ) TEST PROCEDURE RESULT COMPONENT N.O. and C Terminals Set the ohmmeter to [...]

  • Page 64

    3-22 TEST PROCEDURE RESULT COMPONENT a) Normal = 155 K to 350 K ohms @ 68 ˚ F. Set the ohmmeter to the R x 10 K scale. Remove the 6-pin connector from the circuit board and measure across terminals 5 & 6. b) Abnormal = Infinity, or zero ohms (a short). Convection Thermistor Set the ohmmeter to the R x 1 scale, and measure across the terminals.[...]

  • Page 65

    Page 3-23 3-23 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 TEST PROCEDURE RESULT COMPONENT Touch Keyboard (see below). Measure the resistance between the terminal pins of the keypad (shown below) that you wish to check. For example: To measure the “ TEMP PROBE ” keypad, refer to the illustration, and: 1. Find the fir[...]

  • Page 66

    3-24 TEST PROCEDURE RESULT COMPONENT Relay 2 WARNING: When you apply power to the unit, be careful not to touch any of the high voltage circuits. Set the ohmmeter to the R x 1 scale, and check for continuity between the two relay terminal pins. Use the following steps. 1. Remove the wire connectors from the relay terminals. 2. Use a pair of alligat[...]

  • Page 67

    Page 3-25 3-25 Microwave Oven Hood Combo Service Manual — LIT 4317216 Original 03/97 PRIMAR Y , MONITOR, & SECONDAR Y SWITCH CHECKOUT PROCEDURE L1 RELAY #2 SECONDARY INTERLOCK SWITCH OVEN LIGHTS SWITCH MONITOR SWITCH N.C. N.O. C N DOOR CLOSED DOOR OPEN L1 RELAY #2 SECONDARY INTERLOCK SWITCH OVEN LIGHTS SWITCH MONITOR SWITCH N.C. N.O. C N NOTE[...]

  • Page 68

    3-26 — NOTES —[...]