Frigidaire FMV157GS - Microwave User manual

! ATTENTION !
This service manual is intended for use by persons having electrical and mechanical training
and a level of knowledge of these subjects generally considered acceptable in the appliance
repair trade. Electrolux Home Products cannot be responsible, nor assume any liability, for
injury or damage of any kind arising from the use of this manual.
OVER THE RANGE MICROWAVE OVEN
SERVICE MANUAL
Models
FMV157GS
FMV157GB
FMV157GM
FMV157GQ
FMV157GC
CFMV157GS
CFMV157GB
CFMV157GM
CFMV157GQ
CFMV157GC
Part # 316439269Publication # 5995528261 November 2008
https://appliancetechmanuals.com

Page 2
CONTENTS
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY................................................................. 3
BEFORE SERVICING.................................................................................................................................................. 3
WARNING TO SERVICE PERSONNEL....................................................................................................................... 4
MICROWAVE MEASUREMENT PROCEDURE........................................................................................................... 5
FOREWORD AND WARNING ..................................................................................................................................... 6
PRODUCT SPECIFICATIONS ..................................................................................................................................... 7
GENERAL INFORMATION........................................................................................................................................... 7
OPERATION............................................................................................................................................................... 10
TROUBLESHOOTING GUIDE .................................................................................................................................. 14
TEST PROCEDURE .................................................................................................................................................. 16
TOUCH CONTROL PANEL ASSEMBLY..................................................................................................................... 26
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE....................................................................... 30
SCHEMATIC DIAGRAM............................................................................................................................................. 38
WIRING DIAGRAM .................................................................................................................................................... 39
EXPLODED PARTS DIAGRAM.................................................................................................................................. 40
PACKING AND ACCESSORIES ................................................................................................................................ 44
https://appliancetechmanuals.com

Page 3
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPO-
SURE TO EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b) 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.
(c) 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.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave genera-
tion and transmission systems shall be repaired, replaced, or adjusted by procedures described in this
manual before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
(RD8100U)
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave
Measurement Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact ELECTROLUX HOME
PRODUCTS, INC. immediately.
If the unit operates with the door open, service person should 1) tell the user not to operate the
oven and 2) contact ELECTROLUX HOME PRODUCTS, INC. and Food and Drug Administration's
Center for Devices and Radiological Health immediately.
Service personnel should inform ELECTROLUX HOME PRODUCTS, INC. of any certified unit
found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use
the unit until the oven has been brought into compliance.
FMV157GS
FMV157GB
FMV157GM
FMV157GQ
FMV157GC
https://appliancetechmanuals.com

Page 4
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of pro-
ducing very high voltage and current, contact with
following parts
may result in a severe, possibly
fatal, electrical shock.
(Example)
High Voltage Capacitor, High Voltage Power
Transformer, Magnetron, High Voltage Rectifier
Assembly, High Voltage Harness etc..
Read the Service Manual carefully and follow all
instructions.
Before Servicing
1. Disconnect the power supply cord , and then
remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
WARNING:RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.
The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for
60 seconds and then short-circuit the connection of the
high-voltage capacitor (that is the connecting lead of the
high-voltage rectifier) against the chassis with the use of
an insulated screwdriver.
Whenever troubleshooting is performed the power supply
must be disconnected. It may, in some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that these leads remain isolated from other
components and oven chassis by using insulation
tape.
6. After that procedure, reconnect the power supply cord.
When the testing is completed,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case
is installed.
7. Run the oven and check all functions.
After repairing
1. Reconnect all leads removed from components during
testing.
2. Reinstall the outer case (cabinet).
3. Reconnect the power supply cord after the outer case
is installed.
4. Run the oven and check all functions.
Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup
of cold water on the oven turntable, close the door and set
the power to HIGH and set the microwave timer for two (2)
minutes.When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot.If the water remains
cold carry out Before Servicing procedure and re-examine
the connections to the component being tested.
When all service work is completed and the oven is fully
assembled, the microwave power output should be checked
and microwave leakage test should be carried out.
Don't Touch !
Danger High Voltage
FMV157GS
FMV157GB
FMV157GM
FMV157GQ
FMV157GC
https://appliancetechmanuals.com

Page 5
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave
oven should not exceed 1mW/cm2at any point 5cm or more from the external surface of the oven, measured prior to
acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2at any point 5cm or more
from the external surface of the oven.
2) Safety interlock switches:Primary interlock switch shall prevent microwave radiation emission in excess of the requirement
as above mentioned, secondary interlock relay and door sensing switch shall prevent microwave radiation emission in
excess of 5 mW/cm2at any point 5cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard
for microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the oven tray in the oven cavity.
3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5½C (68½F) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.)
and made of an electrically nonconductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
4) Set the cooking control on Full Power Cooking Mode
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement)
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the
oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
the meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity of the
metal has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the
closed latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the primary interlock switch does turn the oven OFF before any door movement.
FMV157GS
FMV157GB
FMV157GM
FMV157GQ
FMV157GC
https://appliancetechmanuals.com