GE JVM2070_H User Manual

GE Consumer & Industrial

TECHNICAL SERVICE GUIDE

Over the Range

Microwave Oven

MODEL SERIES:

JVM2070_H

PUB # 31-9111 2/04

IMPORTANT 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. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

WARNING

To avoid personal injury , disconnect power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.

RECONNECT ALL GROUNDING DEVICES

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.

GE Consumer & Industrial

Technical Service Guide

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PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY.

A. DO NOT OPERATE OR ALLOW THE OVEN TO BE OPERATED

WITH THE DOOR OPEN.

B. IF THE OVEN OPERA TES WITH THE DOOR OPEN, INSTRUCT

THE USER NOT TO OPERATE THE OVEN AND CONTACT THE MANUFACTURER IMMEDIA TEL Y .

C. MAKE THE FOLLOWING SAFETY CHECKS ON ALL OVENS TO

BE SERVICED BEFORE ACTIV A TING THE MAGNETRON OR OTHER MICROWA VE SOURCE, AND MAKE REPAIRS AS NECESSARY:

1. INTERLOCK OPERA TION.

2. PROPER DOOR CLOSING.

3. SEAL AND SEALING SURF ACES (ARCING , WEAR AND OTHER DAMAGE).

4. DAMAGE TO OR LOOSENING OF HINGES AND LA TCHES.

5. EVIDENCE OF DROPPING OR ABUSE.

D. BEFORE TURNING ON MICROWAVE POWER FOR ANY TEST

OR INSPECTION WITHIN THE MICROWA VE GENERA TING COMP ARTMENTS, CHECK THE MAGNETRON, WA VE GUIDE OR TRANSMISSION LINE AND CA VITY FOR PROPER ALIGNMENT , INTEGRITY AND CONNECTIONS.

E. ANY DEFECTIVE OR MISADJUSTED COMPONENTS IN THE

INTERLOCK MONITOR, DOOR SEAL AND MICROW AVE GENERATION AND TRANSMISSION SYSTEMS SHALL BE REPAIRED, REPLACED OR ADJUSTED BY PROCEDURE DESCRIBED IN THIS MANUAL BEFORE THE OVEN IS RELEASED TO THE OWNER.

F . A MICROW AVE LEAKAGE CHECK TO VERIFY COMPLIANCE

WITH THE FEDERAL PERFORMANCE STANDARD SHOULD BE PERFORMED ON EACH OVEN PRIOR TO RELEASE TO THE OWNER.

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Table of Contents

Bottom and Hood Thermal Cutout (TCO) ....................................................................................................18

Cavity Thermal Cutout (TCO) ......................................................................................................................13

Component Locator Views .......................................................................................................................... 7

Components................................................................................................................................................ 9

Control Features ......................................................................................................................................... 6

Control Panel .............................................................................................................................................16

Control Performance T est ...........................................................................................................................20

Cooling F an and Mot or ...............................................................................................................................12

Demonstration Mode ..................................................................................................................................21

Diagnostics Test ........................................................................................................................................21

Door Interlock Switches .............................................................................................................................16

Exhaust Fan ............................................................................................................................................... 9

Fuses ........................................................................................................................................................13

Gas Sensor................................................................................................................................................14

Hidden Vent Motor .....................................................................................................................................15

High Voltage Capacitor...............................................................................................................................18

Illustrated Parts Catalog .............................................................................................................................30

Interior Light ...............................................................................................................................................15

Magnetron..................................................................................................................................................14

Magnetron Thermal Cutout (TCO) ...............................................................................................................13

Microwave Leakage T est ............................................................................................................................22

Microwave Removal and Component Access.............................................................................................. 9

Nomenclature.............................................................................................................................................. 5

Performance T est .......................................................................................................................................22

Primary Interlock System Test ...................................................................................................................17

Schematic..................................................................................................................................................29

Sensor T est (Quick Test)............................................................................................................................20

Side Stirrer.................................................................................................................................................10

Side Stirrer Motor .......................................................................................................................................10

Smart Board...............................................................................................................................................23

Strip Circuits ..............................................................................................................................................24

Surface Lamp Assemblies..........................................................................................................................19

Surface Lamps...........................................................................................................................................19

T op S tirrer................................................................................................................................................... 11

T op S tirrer Motor......................................................................................................................................... 11

Touchscreen Display.................................................................................................................................. 6

Transformer ................................................................................................................................................14

Troubleshooting ..........................................................................................................................................20

Turntable Motor ..........................................................................................................................................18

Warranty ....................................................................................................................................................33

Wiring Diagram ..........................................................................................................................................28

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Model Number

Nomenclature

J V M 2 0 7 0 W H

Product

J = GE Cooking Product

Microwave Oven

V = Over-the-Range Model

Installation

M = Mounts Under Cabinet

Cavity Size (cu. ft.)

20 = 2.0 cu. ft.

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.

The Mini-manual is located behind the hidden vent.

Nomenclature

Model Year Designator

Case Color

S = Stainless W = White C = Bisque B = Black

Feature Pack

Designates features–the higher the number, the more features.

Serial Number

The first two numbers of the serial number identify the month and year of manufacture.

Example: AG123456S = January, 2004 A - JAN 2005 - H

D - FEB 2004 - G F - MAR 2003 - F G - APR 2002 - D H - MA Y 2001 - A L - JUN 2000 - Z M - JUL 1999 - V R - AUG 1998 - T S - SEP 1997 - S T - OCT 1996 - R V - NOV 1995 - M Z - DEC 1994 - L

The letter designating the year repeats every 12 years.

Example:

T - 1974 T - 1986 T - 1998

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Control Features

Touchscreen Display

The touchscreen display provides the access to all cook and defrost controls. If the touchscreen is dark, press the HOME button, the touchscreen, or open the door to access the menu.

For diagnostics displays, see page 20.

• Press TROUBLESHOOTER to find troubleshooting tips for common microwave problems.

• Press SPACEMAKER 2.0 OVERVIEW to find an overview of the features of your microwave.

OFF

WARNING: Pressing OFF does not disconnect

the appliance from the power supply . Pressing OFF while on the HOME screen will put

the touchscreen into standby mode, and the display will be dark. Press the touchscreen or HOME, or open the door to “wake up” the display .

Pressing OFF while on any other screen will cancel the current screen and return the display to the HOME screen.

HOME

HELP

Pressing HELP from the HOME screen allows you to locate feature information and helpful hints.

After pressing HELP:

• Press PRODUCT DETAILS 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.

HOME returns the display to the HOME screen (displayed) at any time. The HOME screen is the starting point for setting any cooking or defrost program, or for setting microwave options. If the touchscreen is dark, press the HOME button to activate the screen.

VENT

Press VENT once for high fan speed. Press a second time for medium fan speed, a third time for low fan speed, and a fourth time to turn the fan off. Press BOOST for extra fan speed.

BOOST

The BOOST button turns the vent fan on HIGH.

LIGHT

Press LIGHT once for bright light. Press a second time for the night light. Press a third time to turn the light off.

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Top View

Component Locator Views

1 - Interior Light 2 - Main and HV Transformer Fuses

3 - Hidden V ent Switch and Motor 4 - V ent Fan and Motor 5 - Top Stirrer Motor 6 - Cavity Thermal Cutout (TCO) 7 - Side Stirrer Motor 8 - Magnetron Antenna Waveguide 9 - Vent Tunnel 10 - Gas Sensor

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Right Side View

1 - Magnetron 2 - Magnetron Thermal Cutout (TCO)

3 - High Voltage Transformer 4 - Magnetron Cooling Fan Motor and Blade 5 - High Voltage Capacitor 6 - Door Sensing Switch (Primary Interlock and Monitor Switch in plastic mount - not shown) 7 - Bottom Thermal Cutout (TCO) 8 - Hood Thermal Cutout (TCO)

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Components

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.

Note: For easier removal and personal safety , it is recommended that 2 people remove the microwave.

Unplug the microwave and remove it from the wall by removing three screws in the cabinet above the microwave.

Exhaust Fan

Resistance through the exhaust fan from the power cord (N) to CN03 pin 7 is approximately

28.7 ohms.

Removal

Remove the microwave (see

and Component Access). Remove the screw on

top of the microwave holding the exhaust adapter in place, then slide the exhaust adapter to the rear and remove.

Top View

Microwave Removal

Tilt the microwave forward and lif t it of f the lower tabs of the rear mounting plate. Route the power cord through the hole.

Place the microwave on a protected counter or table.

To remove the cover, remove 2 screws from the left side, 3 screws from the right side, 5 screws from the top, 5 screws from the rear, and 2 screws from the bottom of the outer cover.

Remove the screw holding the fan in place.

Lift the fan out of the microwave and disconnect the electrical connector.

Disconnect

Open the microwave oven door . Slide the hidden vent to the left and remove the hidden vent.

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Side Stirrer Motor

Side Stirrer

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 7.0 ohms. The door (primary interlock) must be closed to complete circuit. Check motor circuit for 21 V AC when operating.

Removal

Remove the microwave (see

and Component Access).

Microwave Removal

Disconnect the wire connector to the side stirrer motor. Remove the screw and turn the motor

turn CCW. Note: When installing stirrer motor, be sure the

locating pin is inserted in the motor mounting tab and the side stirrer is resting on the support in the cover prior to installing the screw .

Removal

Open the oven door . Pull the plastic rivet out of the stirrer cover. Rotate the stirrer cover CCW until it stops and remove the stirrer cover.

Rivet

Remove the stirrer.

Stirrer

Screw

Disconnect

Note: When assembling, assure that the stirrer rides on the support in the cover .

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+ 23 hidden pages