g GE Consumer Service Training
IMPORTANT SAFETY NOTICE This information is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use. DISCONNECT POWER BEFORE SERVICING IMPORTANT - RECONNECT ALL GROUNDING DEVICES All parts of this appliance capable of conducting electrical current are grounded. If grounding wires, screws, straps, clips, nuts or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY A. A microwave emission check should be performed prior to servicing if the oven is operative. B. Do not operate or allow the oven to be operated with the door open. C. If the oven operates with the door open: I ) Instruct the user not to operate the oven and 2) contact the manufacturer and the Center for Devices and Radiological Health immediately. D. 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 operation 2. Proper door closing 3. Seal and sealing surfaces (arcing, wear, and other damage) 4. Damage to or loosening of hinges and latches 5. Evidence of dropping or abuse E. Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections. F. Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced or adjusted by procedure described in this manual before the oven is released to the owner. G. A microwave leakage check to verify compliance with the federal performance standard should be performed on each oven prior to release to the owner. MICROWAVE LEAKAGE TEST I. Place 275 ml. water in 600 ml. beaker (WB64X5010). 2. Place beaker in center of oven shelf. 3. Set meter to 2450 MHz scale. 4. Turn oven "ON" for 5 minute test. 5. Hold probe perpendicular to surface being tested and scan surfaces at rate of one inch/second. Test following areas: Entire perimeter of door and control panel Viewing surface of door window Exhaust vents 6. Maximum leakage 4MW/CM 2. 7. Record date on service invoice and microwave leakage report. NOTE: MAXIMUM ALLOWABLE LEAKAGE IS 5MW/CM 2. 4MW/CM 2 IS USED TO AL- LOW FOR MEASUREMENT AND METER ACCURACY. Inform the manufacturer of any oven found to have emission in excess of 5MW/CM 2 Make repairs to bring the unit into compliance at no cost to owner and try to determine cause. Instruct owner not to use oven until it has been brought into compliance. 1
Table of Contents SAFETY INFORMATION... 1 CONTENTS... 2 KEYPADS... 3 KEYPADS/KEYPAD TEST PROCEDURE... 4 MODEL FEATURE COMPARISON... 5 SPECIFICATIONS, INSTALLATION, VENTING... 6 LIGHTS, FILTERS, HELP, CLOCK... 7 DELAY START, TIMER ON/OFF, REMINDER/ START/PAUSE, CHILD LOCKOUT... 8 TURNTABLE, VENT FAN, SURFACE LIGHT, SOUND LEVEL, AUTO NITE LIGHT... 9 CUSTOM COOK, ADD 30 SECONDS, TEMP COOK... 10 POPCORN, REHEAT, BEVERAGE, MESSAGE... 11 COOK, SENSOR COOKING... 13 SINGLE FOOD, OPERATING SEQUENCE... 14 GRILLE REMOVAL, CONTROL PANEL, SMART BOARD... 15 KEYPANEL, TRANSFORMER, INTERLOCK SWITCHES, MONITOR SWITCH... 16 FUSE, PRIMARY INTERLOCK TEST... 17 MONITOR TEST, ADJUST INTERLOCKS, DOOR ADJUSTMENT... 18 DOOR ASSEMBLY... 19 ANTENNA, TURNTABLE, HV CAPACITOR... 20 RECTIFIER/DIODE, THERMAL CUTOUTS... 21 HOOD, BOTTOM THERMAL CUTOUTS... 22 GAS SENSOR TEST, SENSOR TEST... 23 SENSOR DETECTION TEST, PROBE, BLOWER...24 RUN CAPACITOR, POWER TRANSFORMER, MAGNETRON FAN... 25 POWER PERFORMANCE TEST... 27 TROUBLESHOOTING GUIDE... 28 SCHEMATIC/WIRING DIAGRAMS... 29 PARTS PAGES... 33 2
1.4 cu. ft. and 1.6 cu. ft. Keypanels JVM1630 JVM1650 JVM1660 JVM1630/JVM1631 JVM1650/JVM1651 JVM1660 JVM1420 JVM1430 JVM1440/JVM1640 JVM1420 JVM1430 JVM1440 3 (same keypad)
1.4 cu. ft. and 1.6 cu. ft. Keypanels JVM1450 JVM1450 JVM1460 JVM1460 KEYPANEL TEST If necessary the key panel pads can be verified by a continutity test. For ease of handling the key panel should be removed and placed on a flat surface. RIBBON PAD CONN PAD CONN BEEPER VOLUME 9-12 DEFROST 4-15 ADD 30 SEC. 4-11 AM/PM 9-13 POWER LEVEL 3-14 TIMER 4-13 SURFACE LIGHT 7-12 VENT FAN 8-12 CLOCK 7-13 1 9-16 POPCORN 7-11 2 8-16 AUTO NITE LIGHT 6-12 3 7-16 DELAY START 6-13 4 6-16 TURNTABLE 5-12 5 5-16 REMINDER 5-13 6 4-16 TIME COOK 5-15 7 9-15 START 3-11 8 8-15 REHEAT 8-11 9 7-15 VEGETABLE 9-10 0 6-15 BEVERAGE 6-11 BEVERAGE 9-11 POTATOES 6-10 JVM1660 ONLY TEMPCOOK/ROST 3-15 CUSTOM 1 8-10 GROUND MEAT 3-10 CUSTOM 2 7-10 CHICKEN PIECES 4-10 MESSAGE 8-13 FISH FILLETS 5-10 APPOINTMENT 3-13 SCHEDULER JVM 1650 ONLY SNACKS 7-14 COOK 8-14 RIBBON PAD CONN PAD CONN SOUND LEVEL 9-12 DEFROST 4-15 ADD 30 SEC. 4-11 AM/PM 9-13 POWER LEVEL 3-14 TIMER 4-13 SURFACE LIGHT 7-12 VENT FAN 8-12 CLOCK 7-13 1 9-16 POPCORN 7-11 2 8-16 AUTO NITE LIGHT 6-12 3 7-16 DELAY START 6-13 4 6-16 TURNTABLE 5-12 5 5-16 REMINDER 5-13 6 4-16 TIME COOK 5-15 7 9-15 START 3-11 8 8-15 REHEAT 8-11 9 7-15 JVM1460 ONLY TEMPCOOK/ROST 3-15 CUSTOM 1 8-10 GROUND MEAT 3-10 CUSTOM 2 7-10 CHICKEN PIECES 4-10 MESSAGE 8-13 FISH FILLETS 5-10 BEVERAGE 9-11 VEGETABLE 9-10 POTATOES 6-10 JVM 1450 ONLY BEVERAGE 6-11 COOK 8-14 SNACKS 7-14 4
FEATURE COMPARISON JVM1460 VS. JVM1660 JVM1460 JVM1660 CAPACITY Oven Cavity 9cu.ft.) 1. 4 1. 6 Style Over-The-Rang e Over-The-Rang e Watts IEC-705 Test Procedure 950 1000 Electronic Touch Controls SmartControl System Electronic Scrolling Digital Display Clock Ye s Yes Plus AM/PM pad Ye s Ye s Plus AM/PM pad V ariable Scroll Speed 5 speed (sub-pad w/am/pm) 5 speed (sub-pad w/am/pm) Display Help Concurrent On/Off Sensor Controls Beverage Chicken Fish Meats Popcorn Potatoes Reheat Vegetables Pad Programming Ye s Ye s sub-pad w/zero Instant-on Instant-on (chicken pieces) Instant-on (fish) Instant-on (ground meats) Instant-on Instant-on Instant-on Instant-on (canned, frzn, fresh) Ye s Ye s sub-pad w/zero Instant-on Instant-on (chicken pieces) Instant-on (fish) Instant-on (ground meats) Instant-on Instant-on Instant-on Instant-on (canned, frzn, fresh) T ime Preference C ontrol Enhancement (1/9) Control Enhancement (1/9) Express Minute Micro/ Add Cook Cook Time Cook 30 Seconds Instant-on 1-6 minute s Instant-on 1-6 minute s I& I Instant-o n Instant-on 1-6 minute s Instant-on 1-6 minute s I & I Instant-o n E xhaust Fan 2 -Speed High capacity (300 CFM) 2-Speed High capacity (300 CFM) Window Other Weight Colors Available and Dimensions Big View BB; AA; SS;WW Wgt-72lbs 5 Big View BB; WB; SB Wgt. 72lbs 33.4"x19.9"x19.4"
OVER THE RANGE 1.4 CU. FT.(JVM1460), AND 1.6 CU. FT. (JVM1660) SPACEMAKER A complete new redesign 1.4 and 1.6 cu. ft. Spacemaker is being introduced in the model line. The most significant change is in the control and the enlarged cavity size. It now has a scrolling message on the control and the cavity has been increased to 1.4 and 1.6cu.ft. The JVM1660 has 1.6 cu. ft., the JVM1460 is 1.4 cu. ft., another feature has been added for the JVM1660,APPOINTMENT SCHEDULER. The JVM1660 is rated at 1000 watts vs 950 watts for the JVM1460. APPOINTMENT SCHEDULER and CALENDAR The new models are: 1.4 cu. ft. 1.6 cu.ft. JVM1460 JVM1660 JVM1450 JVM1650/51 JVM1440 JVM1640/42 JVM1430 JVM1630/31 JVM1420/25 JVM1660 JVM1460 WEIGHT The microwave oven weighs 72 pounds. INSTALLATION The Spacemaker is supported by a special bracket assembly (mounting system) supplied with the oven. The bracket assembly must be mounted to the wall with toggle bolts through the wall, and a lag screw into a wall stud. The unit is mounted to four tabs on lower mounting plate. Four bolts are run down through the kitchen cabinet bottom and into the oven case to pull the oven up against the bottom of the kitchen cabinet. NOTE: For easier removal and personal safety it is recommended that two people remove this product. MOUNTING SCREWS CAUTION! The mounting surface must be capable of supporting the cabinet load, in addition to the72 pound product, plus additional loads of up to 50 pounds or a total weight of 122 pounds. This product cannot be installed to cabinet arrangements such as an island or peninsula. It must be mounted to both a top cabinet and wall. SURFACE LIGHTS Two 40-watt screw base incandescent tubular bulbs (WB36X10003-40T61/2/2) are located on the bottom outside of the grease filters. The bulbs are user replaceable by removing one screw and lowering access cover. The bulbs could be difficult to remove when replaced for the first time, a silicone glue is used to secure them during shipping. CUT OUT MOUNTED TO WALL PLATE USING FOUR HINGES ON WALL PLATE TO THE FOUR SLOTS ON MICROWAVE ALIGMENT PIN 6
SURFACE LIGHTS Two 40-watt screw base incandescent tubular bulbs (WB36X10003-40T61/2/2) are located on the bottom outside of the grease filters. The bulbs are user replaceable by removing one screw and lowering access cover. The bulbs could be difficult to remove when replaced for the first time, a silicone glue is used to secure them during shipping. CAVITY LIGHT A special 40-watt screw base incandescent bulb (WB02X4235) is located in the top of the oven cavity at the front. It is user replaceable by removing the top grill (2 screws). The bulb is then accessible by removing a metal cover (2 screws). GREASE FILTERS Grease filters should be cleaned once a month. Soak the filter in a solution of hot water and detergent. Use of ammonia products will darken the metal. Rinse, shake and remove moisture before replacing. To remove: grasp the "finger hold" and slide to the rear. Pull filter downward to release. To replace: slide filter into the frame slot on the back of the opening, then lift up until it locks in place. COOKING COMPLETE REMINDER After the completion of all defrost and cook cycles (except Temp. Cook/Hold) the control will scroll "FOOD IS READY" and beep once every minute and rescroll message until door is opened or clear/off pad is touched. HELP HELP pad displays feature information and helpful hints. Press HELP, then select a feature pad. POWER UP At power up or after a power interruption the display lights all segments and function indicator words for 15 seconds, and then "PLEASE PRESS CLOCK" scrolls. CLOCK To set the clock, touch CLOCK and enter the time-of-day. Then enter AM/PM. Press "START" (or CLOCK) to start the clock. NOTE: The display can be turned off by pressing and holding the 0 number pad for 3 seconds. SCROLL SPEED The scroll speed of the display can be changed. Press and hold the AM/PM pad about 3 seconds to bring up the display. Select 1-5 for slow to fast scroll speed. CLEAR/OFF When this pad is touched, it shuts off the oven and erases all settings (except for the time of day). 7
DELAY START The DELAY START function provides a 24-hour delay start for any program or sequence of programs. Since it is a 24-hour timer, the start time can be delayed up to a maximum of 23 HOURS and 59 MINUTES. NOTE: The time-of-day clock must be set for the DELAY START./ function to work. To Use Delay Start: 1. Touch DELAY START pad. 2. Enter the time of day you want the oven to start. Be sure the microwave oven shows the correct time of day. 3. Enter desired cooking program. 4. Touch START pad. The oven will automatically start at the desired time. 5. The delay start time will be displayed plus "DS". TIMER ON/OFF The TIMER ON/OFF operates as a minute timer and can be used at any time, even when the oven is operating. To Use Timer On/Off 1. Press TIMER ON/OFF. 2. Enter time you want to count down. 3. Press TIMER ON/OFF to start. NOTE: When time is up, the oven will signal. To turn the timer signal offpress TIMER ON-OFF. The timer indicator will be lit while TIMER ON-OFF is operating. REMINDER The Reminder feature, like an alarm clock, will signal (fast beeps) when a desired time of day is reached. Unlike earlier models this feature can be used at any time, even when the unit is operating. To Use Reminder: 1. Touch REMINDER pad. 2. Enter the desired time of day (23 hours and 59 minutes maximum) that you want the oven to signal. Clock must show correct TOD. 3. Select AM/PM. 4. Touch REMINDER pad. 5. When set time is reached oven will signal with fast beeps and a scrolling message to touch REMINDER pad. NOTE: To remove setting, touch REMINDER pad, then 0. TIMER ON/OFF START/PAUSE In addition to starting many functions. START/PAUSE allows you to stop cooking without opening the door or clearing the display. CHILD LOCK-OUT This feature is to lock the control panel to prevent the microwave from being accidentally started. To lock or unlock the control press and hold the CLEAR/OFF pad for 3 seconds. When the control panel is locked, an "L" will be displayed to the extreme right. 8
TURNTABLE The turntable should be left on for the best cooking results, however when a large dish must be used the turntable can be turned off and the rack used. Illustrations shown are the correct ways to use the rack and turntable. Press TURN- TABLE to turn the turntable off or on. NOTE: it is normal for the turntable at times to become hot to the touch. VENT FAN The vent fan removes steam and other vapors from surface cooking. Press VENT FAN once for high speed, twice for low speed, and a third time to turn the fan off. NOTE: JVM1600s have TWO shelves. SURFACE LIGHT The surface lights have been moved to the outside of the bottom of the oven and now are a tubular bulb. Press SUR- FACE LIGHT once for bright light, twice for the night light and three times to turn the light off. BEEPER VOLUME The beeper sound level can be adjusted up, down, or off. Touch BEEPER VOLUME and choose 0-3 for mute to loud. AUTO NITE LIGHT This feature will allow the night light to be turned on and off at any time. To Use Auto Nite Light: 1. Press AUTO NITE LIGHT. 2. Enter the time you want the light to turn on and select AM/ PM. 3. Press AUTO NITE LIGHT again and enter the time you want the light to turn off and select AM/PM. 4. Press AUTO NITE LIGHT. NOTE: NITE will stay lit to remind you that the feature is set. You can review the auto nite light settings by pressing AUTO NITE LIGHT. To erase the settings and turn off the feature press AUTO NITE LIGHT, then 0. 9
TIME COOKING FUNCTIONS or CUSTOM COOK I & ll (TIME COOK I & ll) The Custom Cook function can be programmed for one or two time cook cycles in the same program. The two cycle feature is useful if a power level change is desired during the cooking operation. Each function can be set for a maximum of 99 minutes and 99 seconds. Custom Cook I & 2 can be programmed in any sequence but it will always execute Custom Cook I first. EXPRESS COOK This "instant on" feature will provide 1-6 minutes of cooking at power level 10 as soon as it is selected. ADD 30 SECONDS The ADD 30 SECONDS feature provides "instant on" at high power ( 10) for 30 seconds or can be used to add 30 seconds to any timed function. DEFROSTING DEFROST AUTO/TIME When auto defrosting press this pad once then select food weight. For time defrost press this pad twice then select time. TEMPERATURE COOKING FUNCTIONS TEMP COOK/ROAST There are three ways to use this feature for cooking by temperature. 1. Set the temperature needed. 2. Temperature is automatically selected for cooking roasts medium or well. Roast Medium - Press TEMP COOK/ ROAST twice. Roast Well - Press TEMP COOK/ROAST three times. 3. Set for simmer; press TEMP COOK/ROAST 4 times. NOTE: The turntable will not turn when the probe is in use. When setting to the temperature needed, after the temperature is reached the microwave will signal. Food will be held at this temperature for 60 minutes and the oven will beep when the hold time is complete. When using the automatic roast feature (medium or well) the microwave will signal when its time to turn the roast over. The oven continues to cook after the signal whether or not the roast is turned. The simmer feature heats food to 180' F. and will hold at that temperature up to 12 hours or until you remove it and press CLEAR/OFF. 10
CONVENIENCE FEATURES (TIME COOKING) POPCORN The popcorn feature is a pre-timed function that allows cooking prepackaged popcorn in bags of 1.75, to 3.5 ounce bags. To Use Popcorn: HOW TO ADJUST THE POPCORN PROGRAM TO PROVIDE A SHORTER OR LONGER COOKING TIME If popcorn is undercooked you can make an adjustment by adding time. - Touch the POPCORN pad and then touch #9, this will add 20 seconds more cooking time. If popcorn is overcooked you can make an adjustment by subtracting time. - Touch the POPCORN pad and then touch # 1, this will subtract 20 seconds of cooking time. REHEAT GUIDE I - Pasta 2: 10 per serving 2 - Meats, casseroles, pizza 1:25 per serving 3 - Fruits and Vegetables 1: 15 per serving 4 - Beverages. 8-10 ounces 1:35 per serving 5 - Sauces and gravies 1: 15 per serving 6 - Plate of leftovers 3:45. 2-3 foods, 4 ounces each, Turntable on & turntable off & no turntable BEV - I minute 50 seconds per serving Turntable on & turntable off I - BAKERY 20 sec/item (1-4) 2 - SANDWICH 55 sec/sand (1-2) 3 - PIZZA 60 sec/slice (1-4) 4 - TOPPING 20 sec/serv (1-4) 5 - SOUPS 24 sec/oz. (8-40 oz) 6 - CHEESE 9 sec/oz. (4-16 oz) REHEAT This feature reheats 1-3 servings of precooked food. To Use Reheat: 1. Press REHEAT 2. The oven signals when steam is sensed and the time remaining begins counting down To reduce time by 10% --Press 1 after feature pad. To add 10% to cooking time --Press 9 after feature pad. BEVERAGE This feature is used to reheat a beverage the size of a cup, one serving. The serving size can be changed to 2 or 3 serving size by touching that number right after touching the beverage pad. Note: beverages heated with this feature may be very hot, remove container with care. (less time) (more time) MESSAGE The message pad allows you to record a short spoken message. 1. Press MESSAGE. 2. Speak toward the control panel in a clear, normal voice. 3. Press MESSAGE again to save the message, immediately or allow the time to count down to save it automatically. To cancel a message during recording, press 0 To erase a recorded message, press 0 during playback. 11
COOK The oven sets the cooking time and power level for a specific food category. To Use Cook: 1. Touch COOK. 2. Select food type, see guide. 3. Enter weight in ounces. 4. Touch START. NOTE: To display the food type and remaining cooking time, touch the COOK pad. SENSOR COOKING FEATURES (JVM MODELS ONLY) Note: Don't use metal shelf with Sensor Cooking. SENSOR COOKING CONDITION Using the sensor assisted cooking codes, the foods are cooked without calculating time, power level or quantity. When the oven senses enough steam from the food, it relays the information to the microprocessor which will calculate the remaining cooking time and power level needed for best results. When the food is cooked, water vapor is developed. The sensor "senses" the vapor and its resistance increases gradually. When the resistance reaches the value set according to the menu, supplementary cooking is started. The time of supplementary cooking is determined by experiment with each food category and entered into the microprocessor. An example of how the sensor works: (POTATOES) 1. Potatoes at room temperature. Vapor is emitted very slowly. 2. Heated potatoes. Moisture and humidity are emitted rapidly. 3. The sensor detects the moisture and humidity and calculates cooking time and variable power. SENSOR COOKING PREFERENCE CONTROL When using the sensor assisted cooking codes, except for CANNED VEG and FROZEN VEG, it is possible to adjust the oven cooking time by 10%. To Use Sensor Cooking Preference Control: - By immediately touching the number I pad after touching a sensor assisted pad the oven will turn off 10% sooner. - By pressing the number 9 pad after touching a sensor assisted pad the oven will cook 10% longer. BEVERAGE This instant on pad reheats beverages by sensing the steam with the sensor system. NOTE: Maximum heating time is 4: 00, preference control not available on beverage pad. 12
POPCORN The POPCORN feature is a pre-programmed function that uses the humidity sensor to automatically select the correct cooking time. NOTE: Use of the metal shelf with the popcorn pad is not recommended. This feature works best when the popcorn contents are in the 1. 75-3.5 ounces range. Maximum heating time is 4:10. To Use Popcorn: 1. Remove the outer wrapper from the microwave popcorn. 2. Open oven door and place package of popcorn in the center of the oven floor as directed by the manufacturer's instructions. Close oven door. 3. Touch POPCORN pad. "POPCORN" appears on the display. Oven turns on instantly. 4. The popcorn sensor automatically calculates the cooking time. After the popcorn sensor detects steam, the oven signals and displays remaining cooking time needed. 5. When cooking is completed, the oven signals and scrolls "FOOD IS READY". Open the door and remove the popcorn. How to adjust the Popcorn Program to provide a shorter or longer cook time: If popcorn is undercooked you can make an adjustment by adding time. - Touch the POPCORN pad and then touch number pad 9 once. The word "POP +" will appear on the display adding 20 seconds to the cook time. If the 9 pad is pressed for the second time "POP ++" will appear on the display adding another 10 seconds for a total of 30 seconds. If popcorn is overcooked you can make an adjustment by subtracting time. - Touch the POPCORN pad and then touch number pad I once. The word "POP -" will appear on the display subtracting 20 seconds to the cook time. If the I pad is pressed for the second time "POP --" will appear on the display subtracting another 10 seconds for a total of 3 0 seconds. REHEAT With this feature the oven automatically adjusts its heating time to various types and amounts of precooked food by sensing the steam that escapes as food heats. Do not open the oven door while the word "REHEAT" IS DISPLAYED, steam escaping will affect oven performance. REHEAT is an instant on function. No need to press start after selecting REHEAT. NOTE: Best results are obtained with foods you want to steam or retain moisture (must be covered). Maximum heating time is 5:00 13
SENSOR COOKING SINGLE FOOD AUTO COOK Canned vegetables, frozen vegetables, fresh vegetables, potatoes, fish fillets, chicken pieces and ground meats are cooked with their own pad. To Use Sensor Pads: 1. Place covered food in the oven and press the matching pad. Oven starts immediately. 2. The oven signals when steam is sensed and time remaining is counting down. It might be necessary to turn or stir food. 3. When finished the oven will signal again and the control will scroll "FOOD IS READY". Turntable on Pad Max Time Serv limit Canned Vegetables 5:30 4-16 oz Frozen Vegetables 13:00 4-16 oz Fresh Vegetables 8:00 4-16 oz Potatoes 11:00 1/2-2lbs. Fish 5:30 4-16 oz Chicken Pieces 12:30 1-8 pieces Ground Meat 7:30 1/2-3lbs Turntable off Pad Max Time Serv limit Canned Vegetables 6:00 4-16 oz Frozen Vegetables 13:00 4-16 oz Fresh Vegetables 8:00 4-16 oz Potatoes 11:00 1/2-2lbs. Note: Do not open the oven door until time is counting down, Fish 5:30 4-16 oz sensor error message will be displayed. When using the sensor assisted cooking codes, except for CANNED VEG and FROZEN VEG, it is possible to adjust the oven cooking time by 10%. (preference control). Chicken Pieces Ground Meat 12:00 6:30 1-8 pieces 1/2-3 lbs OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. OFF CONDITION Closing the door activates the door sensing and primary interlock switches. (In this condition, the monitor switch contacts are opened.) When oven is plugged in, 120 volts A.C. is supplied to the smart board. The display panel lights up for 15 seconds then "PLEASE PRESS CLOCK" scrolls. Touch the CLOCK pad to set the clock and the oven is ready for use. If power is disrupted at any time, the above sequence recurs, and you must reset the clock after touching the CLEAR/OFF pad. COOKING CONDITION When the START pad is touched the following occurs: 1. Relay contacts are closed and the following components are turned on: Main Relay oven lamp/fan motor/stirrer motor Power Relay power transformer 2. 120 volts A.C. is supplied to the primary winding of the power transformer through the contacts of relay 2 and is converted to about 3.3 volts A.C. output on the filament winding, and approximately 2 100 volts on the high voltage winding. 3. The filament winding voltage heats the magnetron filament and the H.V. is sent to a voltage doubler circuit. 14 4. The microwave energy produced by the magnetron is channeled through the wave guide into the cavity feedbox, and then into the cavity where the food is to be cooked. 5. Upon completion of the cooking time, the power transformer, oven lamp, etc. are turned off and the generation of microwave energy is stopped. The oven will revert to the OFF condition. 6. When the door is opened during a cook cycle, the monitor switch, door sensing switch, primary interlock switch and power relay are deactivated with the following results: The circuits to the cooling fan motor and the high voltage components are deenergized, the oven lamp remains on and the digital readout displays the time remaining in the cook cycle when the door was opened. 7. The monitor switch electrically monitors the operation of the primary interlock switch and the power relay and is mechanically associated with the door so that it will function in the following sequence: When the door opens, the primary interlock switch, power relay and door sensing switch open their contacts, then the monitor switch contacts close.
GRILLE REMOVAL The top full-width grille is removable for service to some components, such as: humidity sensor, oven light, door removal, stirrer motor and flame sensor. To Remove Grille: 1. Disconnect oven power. 2. Remove Phillips-head screws (2) from grille. 3. Lift bottom of grille and push top of grille down to remove. CONTROL PANEL The touch control panel is made up of the key panel and control housing trim (I -piece) and the smart board. Touch control will not be available as one complete assembly. If necessary the key panels can be checked by a continuity test. To Remove Touch Control: 1. Disconnect power and remove grille. 2. Remove I screw at top of control panel. Lift up on control to release tabs. 3. Disconnect grounding screw and connectors. 4. Lift up on control to release hinge from mounting screw (GE Models, others remove mounting screw). CONTROL SMART BOARD (PCB) Note: Most connectors are positive lock, check before pulling wire The control smart board is located on the back of the control panel. The smart board has 7 disconnect plugs and they control the following: CON. I -16 pin ribbon connector CON. 2-07 pin vent blower connection CON. 3-06 pin primary L.V.T. & main relay CON. 4 -door sensing & probe connector CON. 5 -gas sensor connector CON. 6 -speaker and microphone connector (1460/1660) Disconnect plugs can be used for diagnostic circuit tests. To Remove Smart Board: 1. Disconnect power, put control in service position (open door, remove I screw at top), and discharge capacitor. 2. Remove and mark connectors and leads from board. 3. Unscrew the 4 smart board mounting screws. Slide board down to free from the 2 mounting tabs. NOTE: Do not flex board. TOUCH CONTROL PANEL ASSEMBLY TEST The touch control panel assembly is divided into two units, Touch Control Pad and Smart Board, and troubleshooting by unit replacement is described according to the symptoms indicated. 1. Touch Control Pad. The following symptoms indicate a defective touch control pad: a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal. NOTE.- If necessary touch control pad can be checked with ohmmeter. (see page 4) 2. Smart Board The following symptoms indicate a defective smart board: 2-1 In connection with pads a) When touching the pads, a certain group of pads do not produce a signal b) When touching the pads, no pad produce a signal. 2-2 In connection with indicators a) At a certain digit, all or some segments do not light up. b) At a certain digit, brightness is low. c) Only one indicator does not light. d) The corresponding segments of all digits do not light up, or they continue to light up. e) Wrong figure appears. f) A certain group of indicators do not light up. g) The figure of all digits flicker. 2-3 Other possible problems caused by defective smart board a) Buzzer does not sound or continues to sound. b) Clock does not operate properly. c) Cooking is not possible. d) Proper temperature measurement is not obtained. REMOVE SMALL GRILLE TO GAIN ACCESS TO FUSE, SPEAKER, & CAPACITOR 15
KEY PANEL The key panel has I ribbon connector on smart board. If necessary, the key panel pads can be checked by a continuity test. For ease of handling, the key panel or control should be removed and placed on a flat surface. Part of the ribbon connections are on one side and the remainder on the other side. Pad operation can be checked between connections at end of ribbon (use high Ohms scale). Use mini-manual to identify connectors. To Replace Key Panel: Separate smart board and control trim/key panel asm. Replace with new control trim/key panel asm. CONTROL TRANSFORMER The control transformer is mounted on the smartboard. TO SERVICE: Lower control panel and unplug leads to smart board. Remove smartboard and replace. DOOR SENSING AND PRIMARY INTERLOCK SWITCHES The primary interlock switch is mounted to the plastic switch bracket on the bottom, the monitor is in the middle and the door sensing switch is mounted to the upper portion of the plastic switch bracket. The power relay is mounted on the smart board. They are activated by the latch heads on the door. When the door is opened, the switches interrupt the circuit to all components, except the oven lamp. A cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches. The primary interlock system consists of the door sensing switch, primary interlock switch and power relay. MONITOR SWITCH The monitor switch is operated (the contacts opened) indirectly by the bottom latch pawl. The pawl operates a cam switch, which in turn, actuates the monitor switch. The switch is intended to render the oven inoperative by means of blowing the monitor fuse when the contacts of the primary interlock switch and power relay fail to open when the door is opened. Functions: I. When the door is opened, the monitor switch contact closes (to the ON condition). At this time the primary interlock switch and power relay are in the OFF condition (contacts open). 2. As the door goes to a closed position, the monitor switch contacts are first opened and then the door sensing switch and the primary interlock switch contacts close. (On opening the door, each of these switches operate inversely.) EXHAUST FAN MOTOR REMOVE SCREW TO LOWER CONTROL PANEL DOOR SENSING SWITCH *DOOR CLOSED 0 Ω *DOOR OPEN Ω 0 0 MONITOR SENSING SWITCH *DOOR CLOSED Ω *DOOR OPEN 0 Ω 0 0 PRIMARY SWITCH *DOOR CLOSED 0 Ω *DOOR OPEN Ω NOTE: REMOVE WIRES TO CHECK CONTINUITY 0 0 16
3. If the door is opened, and the primary interlock switch and power relay contacts fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts. CAUTION: Before replacing a blown monitorfuse, test the primary interlock switch, door sensing switch, monitor switch andpower relay contactsfor proper operation. 20 AMP FUSE MONITOR/LINE FUSE The fuse is an internal 20A fuse, see mini manual for test procedure. CAUTION: Before replacing a blown monitorfuse, test the primary interlock switch, door sensing switch, monitor switch andpower relay contacts for proper operation. If the monitorfuse is blown by improper switch operation, monitorfuse and switch must he replaced even if the monitor switch operates normally. PRIMARY INTERLOCK SYSTEM TEST Disconnect the oven from power supply. MICROPHONE Door Sensing Switch Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch, the meter should indicate an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the door sensing switch. Power Relay Disconnect two (2) wire leads (plastic - squeeze) from the male tab terminals on the printed wiring circuit board provided in the control panel assembly. The tab terminals are located in the area of the circuit board on the component side, and are connected to the contacts of the power relay. Check the state of the relay contacts using an ohmmeter. The relay contacts should be open. If the relay contacts are closed, replace the circuit board entirely. Primary Interlock Switch Test Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicate an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the primary interlock switch. DOOR SENSING SWITCH *DOOR CLOSED 0 Ω *DOOR OPEN Ω 0 0 MONITOR SENSING SWITCH *DOOR CLOSED Ω *DOOR OPEN 0 Ω 0 0 PRIMARY SWITCH *DOOR CLOSED 0 Ω *DOOR OPEN Ω 0 0 NOTE: REMOVE WIRES TO CHECK CONTINUITY 17
MONITOR SWITCH TEST Disconnect the oven from power supply. Before performing this test, make sure that the primary interlock switch and the power relay are operating properly. The monitor switch is located between the top and bottom interlocks. The monitor switch is operated indirectly by the bottom latch pawl. HOW TO TEST MONITOR: 1. Disconnect power, open control panel, and discharge capacitor. 2. Disconnect monitor switch leads, and test at terminals: Door closed---some Ohms (infinity) Door open--0 Ohms 3. Reconnect switch wiring. 4. Test Circuit Operation: A) Connect temporary jumper across relay contacts and primary switch to simulate shorted switch contacts. Locate convienent connections in circuit to be certain COM and N.O. terminals are used. B) Connect OHM meter (LOW scale) across the two line terminals of appliance power cord. Continuity must show: Door Closed--some Ohms Door open-- 0 Ohms C) Remove 20 Amp. Fuse --Circuit must open ( Ohms). If not, check wiring of monitor and interlock circuits. 5. WARNING: After test, remove temporary jumpers and reconnect monitor switch leads. DOOR SENSING, PRIMARY INTERLOCK AND MONITOR SWITCH REMOVAL This procedure should be followed when replacing switches, otherwise they could be damaged. 1. Disconnect oven from power supply and remove outer case. 2. Discharge high voltage capacitor. 3. Disconnect wire leads from the switch(es). 4. Remove two screws holding the interlock bracket to component compartment flange. 5. Lift latch switch bracket assembly to release catch on bracket (top of bracket) to flange. How To Adjust Interlocks: The switch housing is adjustable for door fit and switch operation. 1. Disconnect power, open control panel, and discharge capacitor. 2. Loosen both switch housing mounting screws at enlarged holes in vertical flange. 3. Adjust switch housing for proper switch operation, and door fit. Retighten screws. MICROWAVE LEAKAGE TEST A microwave leakage test MUST BE PERFORMED an time a door is removed, replaced, disassembled, or adjusted for any reason. THE MAXIMUM LEAKAGE IS 4MW/CM 2 18 GUIDELINES FOR ADJUSTMENT OF DOOR SENSING, PRIMARY INTERLOCK AND MONITOR SWITCH If the door sensing switch, primary interlock switch and monitor switch do not operate properly due to a misadjustment, the following adjustment should be made 1. Loosen the two (2) screws holding latch switch bracket to the component compartment flange. 2. With door closed, adjust latch switch bracket 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 switch bracket should be less than 0.5mm (.02"). The vertical position of the latch switch bracket should be placed where the door sensing switch and primary interlock switch have activated with the door closed. 3. Firmly secure the screws with washers. 4. Check the door sensing switch operation. If the door sensing switch has not activated with the door closed, loosen screw and adjust the latch switch bracket. After adjustment, check the following: 1. In and out play of door remains less than 0.5mm (.02") when in latched position. First check upper position of latch switch bracket, pushing and pulling upper portion of door toward tile oven face. Then check lower portion of the latch switch bracket, pushing and pulling lower portion of the door toward the oven face. Both results (movement of the door) should be less than 0.5mm (.02"). 2. The door sensing switch and primary interlock switch interrupt the circuit before the door can be opened. 3. Monitor switch contacts close when door is opened. 4. Reinstall outer case and check for microwave leakage around door with an approved microwave survey meter.
DOOR ASSEMBLY The door assembly will be available as a complete assembly with handle. The handle will also be available as a separate part as will the rest of the door as seen in the door breakdown. To Adjust Door: (Alignment with control panel) 1. Remove top grille - 2 screws. 2. Remove bottom panel - 3 screws at front. 3. Loosen top and bottom 5/16" hinge screws. The screw holes are slotted to allow for minimal movement. Align door and tighten screws. 5. Check interlocks and monitor for proper operation. Check door for microwave leakage with approved meter. To Remove Door: 1. Remove power, top grille and short out capacitor 2. Remove the 4 (2 on top & 2 on bottom) 5/16" head screws on door hinges and #2 phillips head screw on top. 3. Door will pull away from unit with the hinges attached to the door. 4. When reinstalling door reverse procedure and a to the control panel before securing door hinge screws. NOTE: Door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be airtight, moisture (condensation) tight or light-tight. Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement around oven door is not abnormal an do not of themselves, indicate a leakage of microwave energy from oven cavity. If such were the case, the oven could not be equipped with a vent, the very purpose of which is to exhaust vapor-laden air from oven cavity. To Remove Door Handle: With door open: 1. Remove inner door trim. 2. Remove door handle screws. TOP HINGE TOP HINGE HINGE SCREWS DOOR BOTTOM HINGE BOTTOM HINGE DOOR HINGE SCREWS HANDLE AVAILABLE AS A SEPARATE PART 19
ANTENNA A motor drives the antenna assembly and is located at the top of the cavity. This oven uses a top feed wave guide. The antenna blade rests on a depression inside the antenna cover. An antenna motor shaft fits into the assembly to drive it. When the antenna cover is removed the antenna slides off the antenna motor shaft. To Remove the Antenna: 1. Carefully pry down, using a very small (pocket) flat blade screwdriver, the push pin (fastener) located in the antenna cover. 2. Turn the antenna cover counterclockwise, this will free the tabs that are captured by the spaces built into the ceiling. STIRRER MOTOR STIRRER COVER ANTENNA (stirrer blade) Can be accessed from inside oven cavity by removing stirrer cover. GLASS TURNTABLE COUPLER Coupler drive motor must be removed prior to removing coupler TURNTABLE SUPPORT TURNTABLE DRIVE MOTOR To Remove Antenna Motor: 1. Disconnect power and remove grille. 2. Remove antenna/light cover. 3. Release wiring to motor. 4. Remove two screws (snubby screwdriver) holding motor to waveguide. 5. Lift and remove motor. TURNTABLE The turntable shelf is made of a ceramic type material and the supporter ring that it rests on is plastic. The shelf also sits on and is turned by the motor coupling, which can turn in either direction. The turntable shelf must be used when using oven. The turntable motor is mounted to the bottom of the cavity. The bottom plate of the microwave covers the motor and has to be lowered to gain access to the two screws that secure motor. To Remove Turntable: 1. Disconnect oven from power supply. HIGH VOLTAGE CAPACITOR 2. Remove ceramic shelf and supporter from cavity. The high voltage capacitor should always be discharged 3. Remove 3 screws securing bottom plate to unit and rotate by shorting a terminal with I or 2 screwdrivers or with I down. screwdriver with a grounded wire attached. The capacitor 4. Disconnect motor leads, two screws holding motor, motor has an internal discharge "shunt" resistor, but this mechanical discharge procedure should always be followed coupler will stay in oven. 5. When reinstalling motor it will have a "D" shaft on it that for personal safety. will match the coupling. If the capacitor is open, no high voltage will be available to NOTE: The turntable motor is 23V, and is NOT interchangeable with the antenna motor. short or open between the terminal using an the magnetron. Disconnect input leads and check for ohmmeter. 20
Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity for a short time and should indicate an open circuit once the capacitor is charged. If the above is not the case, check the capacitor with an ohmmeter to see if it is shorted between either of the terminals and case. If it is shorted, replace the capacitor. To Replace Capacitor: 1. Disconnect power. Remove grille. 2. Discharge capacitor and disconnect leads. 3. Remove mounting screw that secures capacitor bracket. 4. Slide mounting bracket out of slot and pull out capacitor. WHITE WIRE TO HV TRANSFORMER RECTIFIER/DIODE The rectifier is located in the upper right hand portion of the service area next to the capacitor. It can be checked for continuity in one direction and an open in the opposite direction (meter must be able to forward bias rectifier). If a short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier is probably defective and should be replaced. To Replace Rectifier/Diode: 1. Disconnect power. Lower control to service position. 2. Discharge capacitor and disconnect leads to capacitor. 3. Remove mounting screw that secures capacitor bracket and diode ground screw. 4. Slide mounting bracket out of slot and pull out capacitor/ diode assembly. 5. Remove diode which is mounted to capacitor with one screw. HUMIDITY SENSOR REMOVE COVER TO ACCESS STIRRER MOTOR AND THERMAL CUTOUT CAVITY THERMAL CUTOUT THERMAL CUTOUTS (TCO'S) There are 4 different thermal cutouts in this unit with 4 different purposes. They are: 1. Oven thermal cutout (flame sensor), on cavity top. 2. Hood thermal cutout, inside control area on duct. 3. Bottom thermal cutout, on floor of control area. 4. Magnetron thermal cutout, on rnagnetron. OVEN THERMAL CUTOUT (FLAME SENSOR) The Oven Thermal cutout (Cavity TCO) is located on the top side of the oven cavity, to the left of the humidity sensor by the cavity exhaust. The thermal cutout is rated at 212 0 F. (100 0 C) and is nonresettable. If thermal cutout opens, look for cause. If there was a fire in the cavity all wiring must be inspected to insure that insulation from the wires was not burned or melted away. 1. Remove screw holding cover and remove cover. 2. Slide cutout from retaining clip and remove wiring. NOTE: if this cutout opened there would only be power up to lead from the fuse. Everything behind it would be dead. STIRRER MOTOR ALL COMPONENTS REPLACEABLE WITHOUT REMOVING OUTER CASE 21 BOTTOM THERMAL CUTOUT HOOD FAN THERMAL CUTOUT
HOOD THERMAL CUTOUT This cutout will protect the touch control from excessive heat by turning the vent fan on at low speed. If the surface units of the range are used for long periods of time heat will build up and could damage the microwave control. In order to prevent this a thermal cut out is installed on the duct behind the control. This cutout will close (158'F- vent fan energized) and open (104'F- vent fan de-energized) depending on temperatures it senses. To Remove Hood Cutout: 1. Disconnect power and put touch control in service position. 2. Remove two wire leads and unscrew two screws capturing cutout on duct. NOTE: If this cutout were to open it would be difficult to detect. The only time it functions is during an overheat condition. It will he normally open when checked with an ohmmeter. BOTTOM THERMAL CUTOUT During a fire on the stove the heat could be intense enough to close the Hood Thermal Cutout and force the fan to run. While at moderate high temperatures we do want it to run, however during a fire it is advantageous to NOT have the vent fan running. So if a fire were to start on the stove top the Bottom Thermostat would open (248'F) and remove all power to the microwave oven. This cutout is designed to not be resettable. To Remove Bottom Thermal Cutout: 1. Disconnect power and put touch control in service position. 2. Remove two wire leads and unscrew two screws holding cutout to floor behind touch control. NOTE: If this cutout were to open the microwave oven would be totally dead. It is a normally closed cutout when checked with an ohmmeter for continuity. MAGNETRON THERMAL CUTOUT The magnetron thermal cutout is located above the leads to the magnetron. It is designed to prevent damage to the magnetron if an overheated condition develops in the tube due to cooling fan failure, obstructed air ducts, dirty or blocked air intake. Under normal operation, the magnetron thermal cutout remains closed. However, when abnormally high temperatures are reached within the magnetron, the magnetron thermal cutout will open at 320F causing the oven to shut down. After the temperature drops to 140 O F it will reset and cooking will be able to resume. To Remove Magnetron Thermal Cutout: 1. See Removing Magnetron. NOTE: The Mag TCO is wired across the neutral (return) leg of the power to the board connector. Therefore, the board will go dead but the vent fan and cooktop lights would still operate if the TCO were to open. BOTTOM THERMAL CUTOUT WHITE WIRE TO HV TRANSFORMER HOOD FAN THERMAL CUTOUT 22
SENSOR The sensor is a plug-in device located in the air exhaust duct, behind the grille on the left side. To Service: 1. Remove grille. 2. Separate retainer from receptacle and unplug sensor. GAS SENSOR TEST Microwave sensor cooking uses a special gas sensor which detects both humidity (steam) and hydrocarbons (food odors) during the cooking process. Checking the initial sensor cooking condition: 1. The oven should be plugged in at least five minutes before sensor cooking. 2. Room temperature should not exceed 95'F (350C). 3. The unit should not be installed in any area where heat and steam are generated, for example, next to a conventional surface unit. 4. Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To permit adequate ventilation, be sure to install so as not to block these vents. There should be some space for air circulation. 5. Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture with a dry cloth or paper towel. 6. The Sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature. 7. Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given off by the spray and turn off before food is properly cooked. 8. After about 2 to 9 minutes if the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off. SENSOR TEST (QUICK TEST) 1. With 2 fingers touch and hold the following pads at the same time: 7 and 8 2. Observe diagnostic number in display (numbers approximate) * 15-185 (Normal -verify with "detection test") * 213 or higher (Sensor failed open, sensor unplugged, wiring, or.smart board) * Less then 6 (shorted sensor, or smart board) NOTE: Only heater terminals (H) can be checked with ohmmeter (30 Ohms). CAUTION- DO NOT ATTEMPT TO CHECK SENSOR TERMINALS (CAN DAMAGE SEN- SOR). 23
SENSOR DETECTION TEST 1. Place 1/3 cup tap water in oven. 2. Touch VEGETABLE (jvm1660), oven starts immediately. POPCORN (jvm1650) 3. Control beeps and shuts off. 4. Touch CLEAR/OFF A) Test OK--Normal B) Test Fails--Check Sensor. (see quick test previous page) PROBE RECEPTACLE Receptacle is located on right hand side of cavity. The probe is a sensor that has a thermistor swagged in the tip of a stainless steel tube. The probe can be checked by using an ohmmeter. If inserted into a container of hot water the resistance will visibly drop. To remove probe receptacle: 1. Disconnect power, put touch control in service position. 2. Remove black access cover (2 screws). 3. Remove nut from inside cavity. 4. Unplug wiring from smart board and remove. CABLE END HANDLE SENSOR THE FOLLOWING COMPONENTS REQUIRE REMOVAL OF MICROWAVE OVEN FROM INSTALLATION FOR SERVICING. VENT EXHAUST BLOWER SERVICE The blower is a two speed (HI-LO) capacitor run blower assembly located on top of the spacemaker. The blower is operated by relays located on the smart board. The blower motor has 3 windings which can be tested for continuity from the front by removing the top grille and opening the control panel. To Test Blower Windings: 1. Disconnect power and remove grille. 2. Open control panel and discharge capacitor. 3. Disconnect two wires to run capacitor. Continuity test across the two wires should be approximately 75 ohms of resistance. This test allows you to read across all three windings at the same time. To Remove Vent Blower: 1. Remove unit from its installation. 2. Remove 1 screw under damper, and 2 screws on rear.(1400 series). 3. Remove 1 screw under damper and 1 screw on rear (1600 series). 3. Disconnect blower plug. NOTE: Place blower wires in routing slots to avoid pinching of wires. 24