GE JVM2070 H How to use

MODEL SERIES:
JVM2070_H
TECHNICALSERVICE GUIDE
GE Consumer & Industrial
Over the Range
Microwave Oven
PUB # 31-9111 2/04

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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
Copyright © 2004
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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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 OPERATES WITH THE DOOR OPEN, INSTRUCT
THE USER NOT TO OPERATE THE OVEN AND CONTACT THE
MANUFACTURERIMMEDIATELY.
C. MAKE THE FOLLOWING SAFETY CHECKS ONALL OVENS TO
BE SERVICED BEFOREACTIVATING THE MAGNETRON OR
OTHER MICROWAVE SOURCE,AND MAKE REPAIRSAS
NECESSARY:
1. INTERLOCK OPERATION.
2. PROPER DOOR CLOSING.
3. SEALANDSEALING SURFACES(ARCING,WEARAND
OTHERDAMAGE).
4. DAMAGE TO OR LOOSENING OF HINGESAND LATCHES.
5. EVIDENCE OF DROPPING OR ABUSE.
D. BEFORE TURNING ON MICROWAVE POWER FORANY TEST
ORINSPECTION WITHINTHEMICROWAVE GENERATING
COMPARTMENTS,CHECKTHE MAGNETRON,WAVEGUIDE
OR TRANSMISSION LINEAND CAVITY FOR PROPER
ALIGNMENT,INTEGRITYANDCONNECTIONS.
E. ANY DEFECTIVEOR MISADJUSTEDCOMPONENTSIN THE
INTERLOCK MONITOR, DOOR SEALAND MICROWAVE
GENERATIONANDTRANSMISSION SYSTEMSSHALLBE
REPAIRED, REPLACED OR ADJUSTED BY PROCEDURE
DESCRIBEDIN THISMANUALBEFORE THEOVEN IS
RELEASED TO THE OWNER.
F. AMICROWAVE LEAKAGECHECKTOVERIFYCOMPLIANCE
WITH THE FEDERALPERFORMANCE STANDARD SHOULD
BE PERFORMED ON EACH OVEN PRIOR TO RELEASE TO
THE OWNER.

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Bottomand Hood ThermalCutout(TCO) ....................................................................................................18
CavityThermal Cutout(TCO) ......................................................................................................................13
ComponentLocator Views .......................................................................................................................... 7
Components................................................................................................................................................ 9
ControlFeatures ......................................................................................................................................... 6
ControlPanel .............................................................................................................................................16
ControlPerformanceTest ...........................................................................................................................20
CoolingFanandMotor ...............................................................................................................................12
DemonstrationMode ..................................................................................................................................21
Diagnostics Test ........................................................................................................................................21
DoorInterlockSwitches .............................................................................................................................16
Exhaust Fan ............................................................................................................................................... 9
Fuses ........................................................................................................................................................13
GasSensor................................................................................................................................................14
HiddenVentMotor .....................................................................................................................................15
HighVoltageCapacitor...............................................................................................................................18
Illustrated PartsCatalog .............................................................................................................................30
InteriorLight ...............................................................................................................................................15
Magnetron..................................................................................................................................................14
MagnetronThermalCutout(TCO) ...............................................................................................................13
MicrowaveLeakageTest ............................................................................................................................22
MicrowaveRemoval and Component Access .............................................................................................. 9
Nomenclature.............................................................................................................................................. 5
PerformanceTest .......................................................................................................................................22
Primary Interlock System Test ...................................................................................................................17
Schematic..................................................................................................................................................29
SensorTest (Quick Test)............................................................................................................................20
SideStirrer .................................................................................................................................................10
SideStirrer Motor .......................................................................................................................................10
SmartBoard...............................................................................................................................................23
Strip Circuits ..............................................................................................................................................24
SurfaceLampAssemblies..........................................................................................................................19
SurfaceLamps ...........................................................................................................................................19
TopStirrer...................................................................................................................................................11
TopStirrerMotor.........................................................................................................................................11
TouchscreenDisplay .................................................................................................................................. 6
Transformer ................................................................................................................................................14
Troubleshooting ..........................................................................................................................................20
TurntableMotor ..........................................................................................................................................18
Warranty ....................................................................................................................................................33
WiringDiagram ..........................................................................................................................................28
Table of Contents

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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.
The Mini-manual is located behind the
hiddenvent.
Cavity Size (cu. ft.)
20 = 2.0 cu. ft. Feature Pack
Designates features–the higher
the number, the more features.
Model Year
Designator
Case Color
S = Stainless
W = White
C = Bisque
B = Black
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-MAY 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
Nomenclature

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Control Features
After pressing HELP:
• Press PRODUCT DETAILS to find information
concerning your model and serial number.
• Press FEATURE HELP to find help locating
information on the microwave features.
• Press SAFETY GUIDE to find help locating
microwave safety information.
For diagnostics displays, see page 20.
HELP
Pressing HELP from the HOME screen allows
you to locate feature information and helpful hints.
• 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
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
TheBOOST buttonturnstheventfanonHIGH.
LIGHT
Press LIGHT once for bright light. Press a
second time for the night light. Press a third time
to turn the light off.
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.

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Component Locator Views
1 - InteriorLight
2 - Main and HV Transformer Fuses
3 - HiddenVentSwitchand Motor
4 - VentFanandMotor
5 - TopStirrer Motor
6 - Cavity Thermal Cutout (TCO)
7 - Side StirrerMotor
8 - MagnetronAntennaWaveguide
9 - VentTunnel
10 - Gas Sensor
Top View
7
2
3
4
5
68
9
10
1

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1 - Magnetron
2 - Magnetron Thermal Cutout (TCO)
3 - High Voltage Transformer
4 - Magnetron CoolingFanMotorandBlade
5 - High VoltageCapacitor
6 - Door Sensing Switch (Primary Interlock and Monitor Switch in plastic mount - not shown)
7 - Bottom Thermal Cutout (TCO)
8 - Hood Thermal Cutout (TCO)
Right Side View
2
1
3
5
4
6
78

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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.
Lift the fan out of the microwave and disconnect
the electrical connector.
Remove the screw holding the fan in place.
Tilt the microwave forward and lift it off 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.
Open the microwave oven door. Slide the hidden
vent to the left and remove the hidden vent.
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 Microwave Removal
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.
Disconnect
Top View
Components

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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 7.0 ohms. The door (primary
interlock) must be closed to complete circuit.
Check motor circuit for 21 VAC when operating.
Removal
Remove the microwave (see Microwave Removal
andComponent Access).
Disconnect the wire connector to the side stirrer
motor. Remove the screw and turn the motor 1/8
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.
Disconnect
Screw
Side Stirrer
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
Stirrer
Note: When assembling, assure that the stirrer
rides on the support in the cover.
Remove the stirrer.