Menumaster DECS11MA - User Manual

Microwave Oven
Service Manual
DECS11MA
DES11EA
DFS11G
DFS11EA
UCS11MA
US11EA
UFS11EA
CAUTION
BEFORE SERVICING THE UNIT, READ THE
SAFETY PRECAUTIONS IN THIS MANUAL.

Summary

Safety Precautions

Precautions for Microwave Energy Exposure

Safety checks and precautions for servicing to avoid microwave energy exposure.

Cautions

Microwave Radiation

Precautions regarding microwave energy exposure during operation and servicing.

Qualified Service Personnel

Emphasizes that only qualified personnel should service the oven.

Installations

Installing the Oven

Step-by-step instructions for physically installing the microwave oven.

Earthing Instructions

Instructions and warnings regarding proper earthing of the appliance.

Operating Instructions

Features Overview

Highlights the key physical components of the microwave oven.

Control Panel - DES11 EA;US11 EA

Details the control panel layout and functions for DES11EA/US11EA models.

Operating Instructions

Control Panel - DFS11 EA;UFS11 EA

Details the control panel layout and functions for DFS11EA/UFS11EA models.

Operating Instructions

Control Panel - DECS11 MA;UCS11 MA

Details the control panel layout and functions for DECS11MA/UCS11MA models.

Operating Instructions

Control Panel - DFS11 G

Details the control panel layout and functions for the DFS11G model.

Operating Instructions

Cooking Displays

Explains the various indicators and messages shown on the oven's display during cooking.

Programming Displays

Describes the display messages related to programming modes and user options.

Operation

Interrupting Operation

How to pause or stop the microwave oven during operation.

Canceling Mistakes

Procedures for correcting errors or clearing the display.

Operating Preprogrammed Pads

Instructions for using the pre-set cooking programs.

Operating QTY 2 X Pads

How to use the quantity adjustment feature for cooking.

Manual Time Entry

Guide to manually setting cooking time and power levels.

Programming

Preprogrammed Number Pads

Instructions for programming custom heating times and power levels.

Multiple Heating Stages

How to program consecutive heating cycles for complex cooking.

Programming

User Options

Customizing oven settings like beep volume, key beep, and maximum heating time.

Circuit Description

General Circuit Overview

Explanation of the main components and their functions within the circuit.

Power Level and Door Operation

How power levels are selected and how door status affects operation.

Service Information

Tools and Instruments for Servicing

Lists necessary tools and instruments for servicing the microwave oven.

Microwave Leakage Testing

Cautions and procedures for checking microwave leakage before and after servicing.

Service Information

Leakage Measurement Procedures

Methods for measuring microwave leakage with outer case removed or assembled.

Measurement Notes and Records

Precautions during measurement and requirements for record keeping.

Measurement of Microwave Power Output

Procedure for Power Output Measurement

Detailed steps and formula for measuring the microwave oven's power output.

Disassembly and Adjustment

Outer Case Removal

Steps to remove the outer casing of the microwave oven.

Power Supply Cord Removal

Instructions for disconnecting and removing the power supply cord.

Control Panel Assembly Removal

Steps to remove the control panel assembly from the oven.

Door Main Assembly Removal

Procedure for safely removing the microwave oven door assembly.

Disassembly and Adjustment

PCB Assembly Removal

Steps for removing the Printed Circuit Board (PCB) assembly.

Magnetron Removal

Procedure for safely removing the magnetron, including notes on gasket installation.

Stirrer Fan Motor Removal

Steps to remove the stirrer fan motor.

Disassembly and Adjustment

High Voltage Transformer Removal

Steps for removing the high voltage transformer.

Blower Motor Assembly Removal

Steps to remove the blower motor assembly.

High Voltage Capacitor and Diode Removal

Procedure for removing the high voltage capacitor and diode.

Interlock System Installation and Adjustment

Mounting and adjusting the interlock system components for proper door function.

Interlock Continuity Test

Primary Interlock Switch Test

Testing the continuity of the primary interlock switch.

Secondary Interlock Switch Test

Testing the continuity of the secondary interlock switch.

Monitor Switch Test

Testing the continuity of the monitor switch.

Component Test Procedure

High Voltage Transformer Resistance Test

Measuring the resistance of the high voltage transformer windings.

Magnetron Resistance Test

Measuring the resistance of the magnetron filament terminals.

Component Test Procedure

High Voltage Capacitor Test

Measuring the resistance of the high voltage capacitor terminals and case.

High Voltage Diode Continuity Test

Testing the forward and reverse continuity of the high voltage diode.

Component Test Procedure

Relay 2 Continuity Test

Checking the continuity of Relay 2 under different power levels.

Fan Motor Resistance Test

Measuring the resistance of the fan motor.

Stirrer Fan Motor Resistance Test

Measuring the resistance of the stirrer fan motor.

Trouble Shooting

General Troubleshooting Precautions

Cautions and general advice before troubleshooting microwave oven issues.

Troubleshooting Common Issues

Lists common problems like 'does not work', 'low output', 'sparks', 'uneven cooking' with causes and remedies.

Trouble Shooting

Troubleshooting - Defective Control Circuit

Diagnosing problems related to the control circuit and display.

Trouble Shooting

Troubleshooting - Oven Does Not Operate

Diagnosing why the oven does not operate, focusing on fuse, switches, and transformer issues.

Trouble Shooting

Troubleshooting - No Cooking Start

Diagnosing why the oven does not start cooking after setting time and pressing START.

Troubleshooting - Low Heat Output

Diagnosing issues causing low heat production in the oven.

Trouble Shooting

Troubleshooting - No Microwave Oscillation

Diagnosing issues where no microwave oscillation occurs despite other functions running.

Troubleshooting - Incorrect Power Level

Diagnosing why the oven operates at full power regardless of the selected lower power level.

Exploded View

Introduction to Exploded Views

Overview of the exploded view diagrams for different parts of the oven.

Exploded View

Door Parts Overview

General exploded view of the door assembly components.

Door Parts

Door Assembly Components

Detailed exploded view and part numbers for the door assembly.

Control Panel Parts

Control Panel Components - DFS11 G

Exploded view and part numbers for the control panel of the DFS11G model.

Control Panel Parts

Control Panel Components - DECS11 MA;UCS11 MA

Exploded view and part numbers for the control panel of DECS11MA/UCS11MA models.

Control Panel Parts

Control Panel Components - DES11 EA;US11 EA

Exploded view and part numbers for the control panel of DES11EA/US11EA models.

Control Panel Parts

Control Panel Components - DFS11 EA;UFS11 EA

Exploded view and part numbers for the control panel of DFS11EA/UFS11EA models.

Oven Cavity Parts

Oven Cavity Components

Exploded view and part numbers for the main oven cavity and related parts.

Latch Board Parts

Latch Board Assembly Components

Exploded view and part numbers for the latch board assembly and its parts.

Interior Parts

Interior Components and Wiring

Exploded view of interior parts, including wiring and internal assemblies.

Base Plate Parts

Base Plate Components

Exploded view and part numbers for the base plate and associated parts.

Schematic Diagram of P.C.B

PCB Schematic Overview

Detailed schematic diagram of the Printed Circuit Board (PCB) showing components and connections.

Printed Circuit Board

PCB Layout Diagram

Diagram showing the physical layout of components on the Printed Circuit Board.

Menumaster DECS11MA Specifications

General

Category	Microwave Oven
Model	DECS11MA
Power Output	1100 Watts
Power Source	Electric
Capacity	1.1 cu. ft.
Turntable	Yes
Programmable Settings	Yes
Defrost	Yes
Exterior Finish	Stainless Steel
Color	Silver
Voltage	120V
Control Type	Touchpad
Interior Material	Stainless Steel