GE DVM1950 Technical Service Manual
Over-the-range microwave oven
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Also See for DVM1950:
- Owner's manual (68 pages) ,
- Installation instructions manual (48 pages) ,
- Installation instructions manual (48 pages)
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Summary of Contents for GE DVM1950
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Page 1: Microwave Oven
GE Appliances Technical Service Guide DECEMBER 2011 GE Spacemaker ® Over-the-Range Microwave Oven DVM1950 JNM1951 JVM1950 PNM1971 PVM1970 PVM2170 31-9222 GE Appliances General Electric Company Louisville, Kentucky 40225 – 1 –... - Page 2 OWNER. A MICROWAVE LEAKAGE CHECK TO VERIFY COMPLIANCE WITH THE FEDERAL PERFORMANCE STANDARD SHOULD BE PERFORMED ON EACH OVEN PRIOR TO RELEASE TO THE OWNER. GE Appliances Technical Service Guide Copyright © 2011 All rights reserved. This service guide may not be reproduced in whole or in part in any form without written permission from the General Electric Company.
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Page 4: Table Of Contents
Circuit Board Connectors View ...........................18 Component Locator Views ............................16 Components ..................................19 Control Features ..................................8 Control Panel Assembly ..............................26 Control Performance Test (JVM1950, DVM1950, JNM1951, PVM1970, PNM1971) ......39 Cooling Fan Motor ................................33 Demo Mode ..................................36 Display Board ..................................29 Door Assembly ...................................21 Door Interlocks (Door Latch Switches) ........................40... - Page 5 Schematics and Wiring Diagrams ..........................43 Sensor ....................................41 Smart Board ..................................28 Stirrer Assembly ................................24 Surface Lamps ...................................30 Technical Data Sheet (JVM1950, DVM1950, JNM1951, PVM1970, PNM1971) ........39 Troubleshooting ................................37 Turntable Coupling ................................30 Turntable Motor .................................30 Vent Blower ..................................25 Vent Fan Motor Capacitor.............................31 Vent Thermal Cut Out (TCO)............................32...
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Page 6: Nomenclature
Nomenclature Model Number P V M 2 1 7 0 D P 1 B B Product P = GE Cooking Product Product Color BB = Black Microwave Oven WW = White V = Externally Vented SS = Stainless Steel Over the Range Engineering Model Suffi... -
Page 7: Introduction
Four-speed, 400-CFM venting system – Quickly removes smoke, steam, and odors from the cooktop for fresher, cleaner kitchen air. Recessed turntable with on/off button – Offers the fl exibility to use different sizes of dishes. PVM2170 (2.1 cu. ft. capacity) JVM1950, JNM1951, DVM1950, PVM1970, PNM1971 (1.9 cu. ft. capacity) – 7 –... -
Page 8: Control Features
Control Features PVM2170 Features Throughout this manual, features and appearance may vary from your model. (Continued next page) – 8 –... -
Page 9: Cooking Controls
PVM2170 Controls OOKING AMILY EFROST NACKS TART AUSE ANCEL TEAM IMER ETTINGS 30 S on/off Cooking Controls Check the Convenience Guide before you begin. Time Features Press Enter Press Enter COOKING MENU Food type, Cook Type, etc. COOKING MENU Food Type, Cook Type, etc. DEFROST Time, Weight, Food Type or 1lb Quick Defrost DEFROST... - Page 10 DVM1950, JVM1950, JNM1951 Cook Defrost Settings Popcorn Timer Reheat Family Snacks Soften Steam (Continued next page) – 10 –...
- Page 11 DVM1950, JVM1950, JNM1951 Controls Cook Defrost Settings Timer Popcorn Reheat Family Snacks Soften Steam Cancel Press Enter COOK Amount of cooking time DEFROST Time, Weight or 1 lb Quick Defrost SETTINGS Help, Clock Settings, Turntable On/Off, Auto Night Light, Beeper...
- Page 12 PVM1970, PNM1971 Express Cook EFROST TEAM OWER 30 S EVEL OPCORN EVERAGE TART ANCEL AMILY AUSE OTATO NACKS IMER ETTINGS EHEAT on/off (Continued next page) – 12 –...
- Page 13 PVM1970, PNM1971 Controls EFROST TEAM OWER 30 S EVEL OPCORN EVERAGE TART ANCEL AUSE AMILY OTATO NACKS IMER ETTINGS EHEAT on/off Press Enter COOK Amount of cooking time DEFROST Time, Weight or 1 lb Quick Defrost SETTINGS Help, Clock Settings, Turntable On/Off, Auto Night Light, Beeper Volume, Display Speed, Display Language Timer...
- Page 14 PVM2170 DVM1950, JNM1951, JVM1950 DVM1950, JNM1951, JVM1950, PVM1970, PNM1971 1. Press MyPlate.gov pad. 2. Enter the food group (See Cooking Guide for MyPlate.gov.) code or check the display for the food group. 3. Enter the type (See Cooking Guide for MyPlate.gov.) code or check the display for food types.
- Page 15 Cooking Guide for MyPlate.gov Note: Bold code numbers do not apply to Model PVM2170. The Turn To Select dial is used to select appropriate food group. Food Group Food Type Servings/Details 1 – Grain 1 – Rice 1 – 1/2 cup, 2 – 1 cup, 3 – 1½ cups 2 –...
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Page 16: Component Locator Views
Component Locator Views Front View Vent Grille Control Panel Assembly Turntable Coupling Front View – Control Panel Assembly Removed Cooling Fan Bottom TCO (Continued next page) – 16 –... -
Page 17: Right Side View
Right Side View High Voltage Capacitor Fuses Diode Magnetron TCO Magnetron Cooling Fan Motor Cooling Fan High Voltage Transformer Bottom TCO View From Right Side Vent Motor Capacitor Fuses High Voltage Capacitor View From Top Right Side – 17 –... -
Page 18: Circuit Board Connectors View
Circuit Board Connectors View PVM2170 Smart Board To T/T Motor, Cooktop Lamp, Cooling Motor, To Zero Standby Switch and To Vent Motor and Secondary Interlock Switch – 2 Secondary Interlock Switch – 1 Power-H Relay Power-L Relay To Gas Sensor To Display PCB To Door Sense Switch and Vent TCO To Vent/Cooktop Lamp Tact Switch... -
Page 19: Components
Components Note: In the following section, certain electrical 2. Tilt microwave oven forward, then unhook the terminals that attach to the microwave oven slots at the back, bottom edge from the lower components utilize a locking tab. Some tabs cannot tabs of the mounting plate. -
Page 20: Outer Cover
4. Remove 6 Phillips-head screws from the bottom Outer Cover cover of the oven. To gain access to many of the microwave oven components, it is necessary to remove the outer cover. WARNING: To prevent electrical shock, use extreme caution when diagnosing oven with outer cover removed and power ON. -
Page 21: Door Assembly
Door Assembly The door comes as an entire assembly, although, the door handle can be obtained separately. Lift door to disengage upper and lower door hinge the pins from the hinge arms. Note: A microwave leakage test must be performed any time a door is removed, replaced, disassembled, or adjusted for any reason. -
Page 22: Interior Light
To disassemble the door: Interior Light 1. Place the door, face down, on a protective The interior light is 120 VAC, 50 watt halogen bulb surface. (Part # WB25X10026.) 2. Using a putty knife, carefully pry the choke To remove the interior light: cover away from the door frame. -
Page 23: Power Saver (Energy Saver)
4. Using gloves or a cloth, pull the bulb straight Power Saver (Energy Saver) out of its receptacle. The timekeeping device that keeps the clock running needs to be recharged every few days. It is recommended that once a week the microwave Bulb oven be left powered on by not using the Power Saver (Energy Saver) feature for at least 24 hours. -
Page 24: Stirrer Assembly
Power Saver Battery Stirrer Assembly The rechargeable power saver battery is mounted The stirrer assembly consists of a blade, pin, and in a plastic holder that is mounted to the grille, just cover. The blade is air driven and rotates on a shaft above the control panel assembly. -
Page 25: High Voltage Fuse
Noise Filter Line Fuse The noise fi lter helps to suppress electromagnetic Note: When the line fuse is blown due to operation interference (EMI) radiating from the operation of of the monitor switch, the monitor switch must the microwave oven, and it also protects the oven be replaced. -
Page 26: Control Panel Assembly
2. Remove the Phillips-head screw from the top of Control Panel Assembly the oven and the 2 Phillips-head screws from the rear of the oven. The control panel assembly consists of a smart board, frame, and touch pad assembly. To remove the control panel assembly: 1. -
Page 27: Door Interlock Switches
6. Remove the ribbon cable by gently raising the Door Interlock Switches connector clip that secures the ribbon cable, then pull the ribbon cable from connector. The door has 3 interlock switches: the door sensing, primary interlock, and monitor switches. All switches are removed in the same manner. -
Page 28: Smart Board
To remove the door interlock switches: Smart Board 1. Disconnect wiring to the door switches. To remove the smart board: 1. Remove the control panel assembly. (See Control Panel Assembly 2. Remove the 7 connectors from the smart board Door Sensing Switch 3. -
Page 29: Bottom Thermal Cut Out (Tco)
Display Board Bottom Thermal Cut Out (TCO) To remove the display board: The bottom TCO is located on the bottom-right side of the oven behind the control panel. The bottom 1. Remove the control panel assembly. TCO is not resettable. (See Control Panel Assembly The bottom TCO's contacts open at approximately... -
Page 30: Surface Lamps
Surface Lamps Turntable Coupling The surface lamps are 120 VAC, 20 or 50 watt To remove the turntable coupling: (maximum) halogen bulbs (Part # WB08X10051). Turn the turntable coupling, so the notch in the To remove surface lamp assemblies: coupling is facing the front of the microwave oven, and lift coupling off motor shaft. -
Page 31: Magnetron
Magnetron Thermal Cut Out (TCO) Magnetron The magnetron TCO is located on the magnetron WARNING: Prior to servicing the magnetron, be and opens when the magnetron temperature certain the capacitor is discharged. Manually reaches 302°F. discharge it by placing an insulated-handle screwdriver between the diode connection on the The magnetron TCO is a normally closed switch. -
Page 32: Cavity Thermal Cut Out (Tco)
Slide the cavity TCO from beneath the spring clips. Cavity Thermal Cut Out (TCO) The cavity TCO is a one-shot device that will open at 230°F if a thermal event takes place within the oven cavity. 1. Remove the outer cover. (See Outer Cover Spring Clip Cavity TCO... -
Page 33: Cooling Fan Motor
5. Remove the 6 Phillips-head screws attaching Cooling Fan Motor the bottom cover of the microwave oven cabinet. The cooling fan motor is located on the right side of the microwave oven. To remove the cooling fan motor: 1. Remove the control panel assembly. (See Control Panel Assembly 2. -
Page 34: Capacitor And Diode
8. Move the cooling fan frame out thru the right Capacitor and Diode side of the microwave oven. The capacitor has an internal shunt resistor to automatically discharge the capacitor when the microwave oven turns off. Under normal operation, the capacitor should fully discharge within 30 seconds. -
Page 35: High Voltage Transformer
3. Remove 6 Phillips-head screws from the bottom High Voltage Transformer cover of the microwave oven cabinet. The high voltage transformer is located on the right side of the microwave oven, beneath the magnetron. WARNING: Prior to servicing the transformer, be certain the capacitor is discharged. -
Page 36: Demo Mode
Demo Mode To enter Demo Mode for the 2.1 Series microwave models: 1. Unplug unit or turn off power for at least 3 minutes. 2. Restore power. 3. Within 30 seconds, press and hold the Start/Pause and Back pads at the same time for at least 3 seconds. -
Page 37: Troubleshooting
Troubleshooting PCB? – 37 –... -
Page 38: Error Messages
Oven Performance Test 1. Measure line voltage (loaded). This is based on normal voltage variations of 108V to 132V. Low voltage will lower output power and temperature rise. 2. Place WB64X73 (do not use any other load or dish as results will vary from standard), beaker containing one liter of water (1000 ml, 59°F ~ 75°F) on turntable and record the starting temperature with an accurate thermometer. - Page 39 Control Performance Test (JVM1950, DVM1950, JNM1951, PVM1970, PNM1971) 1. Set Clock – Touch Settings pad 2 times, enter time of day, press Settings pad to select AM/PM, then touch Settings pad again to set. 2. Alternately, touch each function pad and enter time, power level, or selection for the selected function.
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Page 40: Door Interlocks (Door Latch Switches)
Door Interlocks (Door Latch Switches) The interlocks are designed as follows: 6. Test the circuit operation: Primary interlock switch – Bottom switch a. Connect a temporary jumper across the operated by bottom latch pawl connected to relay contacts and primary switch to line (L) leg. -
Page 41: Sensor
Sensor Sensor Cooking The Sensor Cooking function uses a special gas sensor that detects both humidity (steam) and hydrocarbons (food odors) during the cooking process. Before conducting either of the sensor tests below, ensure the unit is plugged into a wall outlet for at least 5 minutes. Do not power the unit during the 5 minutes. If unit is already plugged in, proceed. -
Page 42: Key Panel Test (Jvm1950, Dvm1950, Pvm1970)
Key Panel Test (JVM1950, DVM1950, PVM1970) If necessary, the key panel pads can be verifi ed by a continuity test. For ease of handling, the key panel should be removed and placed on a fl at surface. Check the continuity between the connections at the end of the ribbon. -
Page 43: Schematics And Wiring Diagrams
Schematics and Wiring Diagrams PVM2170 Schematic Diagram (Continued next page) – 43 –... - Page 44 PVM2170 Wiring Diagram (Continued next page) – 44 –...
- Page 45 DVM1950, JNM1951, JVM1950, PVM1970, PNM1971 Schematic Diagram (Continued next page) – 45 –...
- Page 46 DVM1950, JNM1951, JVM1950, PVM1970, PNM1971 Wiring Diagram – 46 –...
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Page 47: High Voltage Half–Wave Doubler
High Voltage Half–Wave Doubler The half wave voltage doubler circuit consists of the secondary winding of the high voltage transformer, high voltage diode (rectifi er), and the high voltage capacitor. The high voltage diode allows alternating current (AC) to fl ow in one direction only and rectifi es it to pulsating direct current (DC). The high voltage capacitor is able to store energy on one half of the AC cycle and release it on the other half cycle. -
Page 48: Warranty
This warranty is extended to the original purchaser and any succeeding owner for products purchased for home use within the USA. If the product is located in an area where service by a GE Authorized Servicer is not available, you may be responsible for a trip charge or you may be required to bring the product to an Authorized GE Service Location for service.