Frigidaire CFMV157GC 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

Frigidaire CFMV157GC Specifications

General

Type	Over-the-Range Microwave
Capacity	1.5 cu. ft.
Power	1000 Watts
Control Type	Electronic Touch Control
Color	Stainless Steel
Turntable	Yes
Cooking Presets	Yes
Sensor Cooking	Yes
Child Lock	Yes
Defrost Function	Yes
Voltage	120V
Dimensions	29.875" W x 15" H x 15.875" D
Exterior Dimensions	29.875" W x 15" H x 15.875" D

Summary

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

BEFORE SERVICING

Procedures to follow before beginning any service work on the oven.

WARNING TO SERVICE PERSONNEL

Before Servicing

Steps to take before starting microwave oven service.

When the testing is completed

After repairing

MICROWAVE MEASUREMENT PROCEDURE

A. Requirements

Specifies leakage limits and safety interlock switch requirements.

B. Preparation for testing

Procedures for preparing the oven and load for leakage testing.

C. Leakage test

Detailed steps for performing the closed-door microwave leakage test.

OPERATION

DESCRIPTION OF OPERATING SEQUENCE

Explains the sequence of component functions during oven operation.

POWER LEVEL P-0 TO P-90 COOKING

DESCRIPTION AND FUNCTION OF COMPONENTS

DOOR SENSING SWITCH, PRIMARY INTERLOCK SWITCH

MONITOR SWITCH

TROUBLESHOOTING GUIDE

Important Notes

Critical instructions for troubleshooting and power disconnection.

TEST PROCEDURES

MAGNETRON ASSEMBLY TEST

Procedure to test the magnetron assembly for continuity and shorts.

MICROWAVE OUTPUT POWER

Procedure to measure microwave power output using a water temperature rise test.

POWER TRANSFORMER TEST

Procedure to test the power transformer resistance and continuity.

HIGH VOLTAGE RECTIFIER TEST

Procedure to test the high voltage rectifier for shorts or open circuits.

HIGH VOLTAGE CAPACITOR TEST

Procedure to test the high voltage capacitor for shorts or open circuits.

CAVITY THERMAL CUT-OUT TEST

MAGNETRON TEMPERATURE FUSE TEST

PRIMARY INTERLOCK SWITCH TEST

Procedure to test the primary interlock switch operation.

PRIMARY INTERLOCK SYSTEM TEST

DOOR SENSING SWITCH

Procedure to test the door sensing switch operation.

SECONDARY INTERLOCK RELAY (RY2)

MONITOR SWITCH TEST

HOOD THERMAL CUT-OUT TEST

HOOD FAN MOTOR TEST

TOUCH CONTROL PANEL ASSEMBLY TEST

Procedure to test the touch control panel assembly, including Key Unit and Control Unit.

KEY UNIT TEST

RELAY TEST

DEFROST CENTER TEST

FOIL PATTERN ON THE PRINTED WIRING BOARD TEST

NOISE FILTER TEST

TOUCH CONTROL PANEL ASSEMBLY

OUTLINE OF TOUCH CONTROL PANEL

DESCRIPTION OF LSI

SERVICING

Precautions for Handling Electronic Components

Guidelines for handling electronic components, especially CMOS LSI.

Servicing of Touch Control Panel

Procedures and precautions for servicing the touch control panel.

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING AGAINST HIGH VOLTAGE

Warnings regarding high voltage hazards during servicing.

WARNING FOR WIRING

Precautions to take before and during wiring adjustments.

POWER TRANSFORMER REMOVAL

MAGNETRON REMOVAL

HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL

Schematic Diagram

Wiring Diagram