Instruction/ maintenance manual of the product JVM2070_H GE
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MODEL SERIES: JVM2070_H TECHNICAL SER VICE GUIDE GE Consumer & Industrial Over the Range Microwave Oven PUB # 31-9111 2/04.
– 2 – IMPORT ANT SAFETY NOTICE The information in this service guide 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.
– 3 – PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO A VOID POSSIBLE EXPOSURE TO EXCESSIVE MICROW A VE ENERGY . A . DO NOT OPERA TE OR ALLOW THE OVEN T O BE OPERA TED WITH THE DOOR OPEN. B. IF THE OVEN OPERA TES WITH THE DOOR OPEN, INSTRUCT THE USER NOT T O OPERA TE THE OVEN AND CONT ACT THE MANUF ACTURER IMMEDIA TEL Y .
– 4 – Bottom and Hood Thermal Cutout (TCO) .................................................................................................... 1 8 Cavity Thermal Cutout (TCO) .......................................................................
– 5 – Product J = GE Cooking Product Microwave Oven V = Over-the-Range Model Installation M = Mounts Under Cabinet Model Number Nomenclature J V M 2 0 7 0 W H The nomenclature plate is located on the microwave cabinet inside the door . In addition to model and serial number , this plate also shows power ratings.
– 6 – Control Features After pressing HELP: • Press PRODUCT DET AILS to find information concerning your model and serial number . • Press FEA TURE HELP to find help locating information on the microwave features. • Press SAFETY GUIDE to find help locating microwave safety information.
– 7 – Component Locator Views 1 - Interior Light 2 - Main and HV T ransformer Fuses 3 - Hidden V ent Switch and Motor 4 - V ent Fan and Motor 5 - T op S tirrer Motor 6 - Cavity Thermal Cutout (TCO.
– 8 – 1 - Magnetron 2 - Magnetron Thermal Cutout (TCO) 3 - High V oltage Transformer 4 - Magnetron Cooling Fan Motor and Blade 5 - High V olt age Capacitor 6 - Door Sensing Switch (Primary Interlo.
– 9 – Microwave Removal and Component Access Note: Some components can be accessed without removing the microwave. If the 2 end screws on top of the outer cover are accessible ( see illustration below ), the hidden vent can be removed without removing the microwave from its installation.
– 10 – Side Stirrer Motor The side stirrer motor is located on the left side of the microwave oven. Resistance through the side stirrer motor from the power cord (L) to CN04 pin 5 is approximately 6.7 ohms. Isolated, the side stirrer motor is approximately 7.
– 11 – Disconnect the electrical connector from the motor . Remove 2 screws that hold the motor in place and remove the motor . T op Stirrer Motor Resistance through the top stirrer motor from the power cord (L) to CN04 pin 5 is approximately 6.7 ohms.
– 12 – Cooling Fan and Motor Resistance through the cooling fan motor from the power cord (L) to CN04 pin 7 is approximately 24.7 ohms. The door (primary interlock) must be closed to complete circuit. The cooling fan motor , in series with the drive motors, provides voltage reduction to 21 V AC.
– 13 – Magnetron Thermal Cutout (TCO) The magnetron TCO is located on the magnetron and shuts off when the magnetron temperature reaches 150°F (65.5°C). The magnetron TCO is a normally closed switch. An open reading across the TCO indicates a failed TCO.
– 14 – Gas Sensor The gas sensor detects humidity changes during sensor cook functions and transmits this information to the main board. The gas sensor is located in the air exhaust duct, behind the grille on the left side. T o check, run diagnostics ( see Diagnostics T est ).
– 15 – Interior Light Resistance through the interior light from the CN02 pin 7 to the power cord (L) is approximately 24.9 ohms. Removal Note: This component may be able to be accessed without removing the microwave.
– 16 – Control Panel The control panel contains the smart board, the touchscreen panel, and a three-button circuit board. Run the test for the control panel (see Control Performance Test ). The control panel is replaced as an assembly . Removal Remove the hidden vent (see Microwave Removal and Component Access ).
– 17 – Primary Interlock System T est W ARNING : Disconnect the oven from the power supply . 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.
– 18 – High V oltage Cap acitor Removal and Replacement W ARNING: Prior to servicing, be certain the capacitor is discharged. Manually discharge by placing an insulated-handle screwdriver between the diode connection of the capacitor and the oven chassis ground.
– 19 – Surface Lamps Removal Remove the screw on the surface lens panel and open the panel. Surface Lamp Assemblies Resistance through the surface lamps from the CN04 pin 3 to the power cord (N) is approximately 62 ohms. Removal Remove 5 screws from the bottom of the microwave oven cabinet and remove the bottom plate.
– 20 – Control Performance T est Set T ime: 1 . T ouch OPTIONS on the HOME display . 2 . T ouch SET CLOCK on the OPTIONS display . 3 . Using the numbers on the touchscreen, enter the time of day . Press ENTER when finished or CLEAR to erase the time you entered.
– 21 – Diagnostics T est Simultaneously press the LIGHT and OFF keys for 3 seconds. The diagnostics screen will appear in the LCD display . Sample Diagnostics Screen Displayed Information • MODEL - Identified at power-up by the keytail ID option.
– 22 – Performance T est 1 . Measure the line voltage (loaded). This test is based on normal voltage variations of 108V to 132V . Low voltage will lower output power and temperature rise.
– 23 – Smart Board The smart board contains the power relay , L VT , vent blower triac, surface light relays, and other components to perform the proper switching circuits. Several disconnect plugs are also located on the smart board. CN01 - Ribbon connector .
– 24 – Strip Circuits V ent Motor Does Not Work Fan Motor Does Not Work Louver Motor Does Not Work.
– 25 – Note: The Magnetron Tube TCO automatically resets when the conditions return to normal. The Cavity TCO is not resetable. It must be replaced. Dead Unit - Cavity or Magnetron TCO Does Not Work T op Stirrer , Side Stirrer , or Drive Motor Does Not Work Note: The Bottom TCO is not resetable.
– 26 – Interior Light Does Not Work Surface Lamps Do Not Work.
– 27 – Magnetron Does Not Work 1 2 1 - Red 2 - White 3 - Blue 4 - Black 3 4 2 Re pl ac e t he HV t rans fo r me r . Do es t he ma gn etron w ork? Rep la c e t h e m a gn et r on . Rep lace th e pri ma r y in t er lo ck swit ch or r epai r fau l ty w i ring be tw ee n th e HV tra nsfor m er an d the pri m ary in t er lo ck switch.
– 28 – Note: For servicing replacement use 16GA. 105°C thermoplastic covered leads or as noted on special leads. W ARNING: Power must be disconnected before servicing this appliance.
– 29 – Code No. : DE99-00125F W ARNING: Power must be disconnected before servicing this appliance. Schematic.
– 30 – Illustrated Part s Cat alog.
– 31 – V I EW NUM BER CAT AL O G NUM BER DES CRI P T I O N Q UANT I T Y 1 W B 15X 10135 HANDLE W H 1 5 W B 55X 10673 DOOR -A AS M 1 6 W B 55X 10668 DOOR MA I N A S M 1 7 W B 05X 10012 DOOR - KEY 2.
– 32 – V I EW N UM BER CAT AL O G NUM BER DES CRI P T I O N Q UANT I T Y 81 W B 06X 10436 H OO D DAM P E R A S M 1 82 W B 06X 10165 BRA CKE T -V / T MOT O R 1 83 W B 26X 10138 MOT O R- V E NT ILA .
– 33 – OTR MICROW A VE OVEN W ARRANTY For the period of: GE will replace: Full one-year Entire oven W arranty What GE will not cover • Service trips to your home to teach you how to use the product. • Replacement of home fuses or resetting of circuit breakers.
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If you already are a holder of GE JVM2070_H, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime GE JVM2070_H.
However, one of the most important roles played by the user manual is to help in solving problems with GE JVM2070_H. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device GE JVM2070_H along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
