Anvil MWA1400 Service Manual
  1. Manuals
  2. Brands
  3. Anvil Manuals
  4. Microwave Oven
  5. MWA1400
  6. Service manual

Anvil MWA1400 Service Manual

Commercial microwave oven
Hide thumbs Also See for MWA1400:
Table of Contents

Advertisement

Quick Links

Download this manual
MWA1400
Commercial Microwave Oven
Service Manual

Advertisement

Table of Contents
loading

Related Manuals for Anvil MWA1400

Summary of Contents for Anvil MWA1400

  • Page 1 MWA1400 Commercial Microwave Oven Service Manual...
  • Page 2 Anvil imported and distributed by International Catering Equipment Unit B2, 6-10 Durdans Avenue, Rosebery NSW 2018 Australia Ph: +61 2 8372 0800 www.internationalcatering.com.au Caution: Our ongoing committment to improving performance and reliability means that parts listed in this manual may be changed without prior notice.

  • Page 3: Table Of Contents

    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) Make the following safety checks on all ovens to be serviced before activating the magnetron or other micro- wave 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.

  • Page 4: Cautions

    CAUTIONS CAUTIONS Unlike other appliances, the microwave oven is MICROWAVE RADIATION high-voltage and high-current equipment. Personnel should not be exposed to the Though it is free from danger in ordinary use, microwave energy which may radiate from the extreme care should be taken during repair. magnetron or other microwave generating device if it is improperly used or connection.

  • Page 5: Installations

    accordance with th ven should not be installed in any area where Green-and-yellow INSTALLATIONS nd steam are generated, because they may Blue: ge the electronic or mechanical parts of the Brown: INSTALLATIONS install the oven next to a conventional BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY. e unit or above a conventional wall oven.

  • Page 6: Service Information

    SERVICE INFORMATION SERVICE INFORMATION CIRCUIT DESCRIPTION power of microwave oven as POWER LEVEL. GENERAL DETAILS (refer to page 1-1) • The low voltage transformer supplies the necessary voltage to the micom controller when power cord is WHEN THE DOOR IS OPENED DURING plugged in.

  • Page 7: Parts List

    PARTS LIST Part Code Part Name Qty/unit Positon 12270000000055 Cavity Assembly 12270000008244 Thermostat Bracket 12570000000005 Plate Cover *Inner Assembly 12270000000005 Baseplate 12270000006204 Hinge Assembly 17270000B56728 + 17170000001145 Control Panel Assembly 12170000002937 Control Panel 12270000004436 C/Panel Decoration 17170000022997 Mi Assembly 17170000001145 Membrane Switch 12670000000009 Sealing Ring...
  • Page 8 PARTS LIST Part Code Part Name Qty/unit Positon 17470000002294 Microswitch 17470000002313 Microswitch 17470000002444 Main Wire Harness 12270000010792 Stirrer Fan Assembly 11002014000013 Synchronous Motor 12170000003988 Sealing Water Bracket 12170000004303 Fan Guide 12170000000209 11002017001305 Brushless DC Motor 12270000000150 Wind Guide Cover 12270000033201 MOUNTING PLATE 12270000000158 Wind Guide Cover...

  • Page 9: Parts Diagram

    PARTS DIAGRAM...

  • Page 10: Operations And Functions

    PARTS DIAGRAM...

  • Page 11: Tools And Measuring Instruments

    TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS NECESSARY MEASURING INSTRUMENTS Tools normally used for TV servicing are sufficient. • TESTER(VOLTS-DC, AC., Ohmmeter) Standard tools are listed below. • Microwave survey meter • Diagonal pliers - Holaday HI-1500 • Long nose pliers HI-1501 •...
  • Page 12 MEASUREMENT WITH OUTER CASE NOTES WHEN MEASURING REMOVED • Do not exceed meter full scale deflection. • The test probe must be removed no faster than • When you replace the magnetron, measure for 1 inch/sec (2.5 cm/sec) along the shaded area, microwave energy leakage before the outer case is otherwise a false reading may result.

  • Page 13: Measurement Of Microwave Power Output

    MEASUREMENT OF MICROWAVE POWER OUTPUT • Microwave power output measurement is made with is measured while the microwave generator is the microwave oven supplied at its rated voltage and operating at full power. Magnetron filament heat-up operated at its maximum microwave power setting with time is not included.

  • Page 14: Removing The Door

    5 . AIR GUIDE ASSEMBLY REMOVAL 4 . DOOR ASSEMBLY REMOVAL 1) Disconnect the wire from lamp, release the screws 1) Open the door. fixed between air guides and magnetron. 2) Remove two screws holding the Hinge to the Cavity Ass'y. 2) Take out the lamp and the air guides.

  • Page 15: Removing The Cooling Fan

    NOTE: NOTE: 1. Remove the wire lead from the turntable motor 1. When removing the magnetron, make sure its VERY CAREFULLY. dome does not hit any adjacent parts, or it may be Magnetron Magnetron Gasket Waveguide Bracket Dome Waveguide 7 . FAN ASSEMBLY REMOVAL 1) Release the screws and take out the fan assembly.

  • Page 16: Magnetron Removal

    1 1 . INTERLOCK SYSTEM 9 HIGH VOLTAGE CAPACITOR AND DIODE REMOVAL 1) INTERLOCK MECHANISM The door lock mechanism is a device which has 1) Discharge the high voltage capacitor. been specially designed to eliminate completely 2) Disconnect the leadwire from fan motor, noise filter microwave activity when the door is opened during and high voltage capacitor.

  • Page 17: Interlock Continuity Test

    INTERLOCK CONTINUITY TEST WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS. TYPE NO. KW3A FOR SWITCHS 2 . SECONDARY INTERLOCK SWITCH TEST 1 . PRIMARY INTERLOCK SWITCH TEST Disconnect the wire lead from the secondary When the door release button is depressed slowly switch.

  • Page 18: Interlock Mechanism And Adjustment

    COMPONENT TEST PROCEDURE CAUTIONS 1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER.

  • Page 19: Troubleshooting Guide

    COMPONENTS TEST PROCEDURE RESULTS Antenna Gasket Chassis Filament NOTE: When testing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition. HIGH VOLTAGE Measure the resistance. Normal: Momentarily indicates CAPACITOR (Ohm-meter scale: Rx1000) several ohms, and then...
  • Page 20 COMPONENTS TEST PROCEDURE RESULTS FUSE Check for continuity of the fuse with an Normal Abnormal multi-meter. NOTE: If the fuse is blown, check the primary, the secondary, and the monitor switches, H.V.D. and H.V.C. before replacing the fuse. If the fuse is blown by improper switch operation replace the defective switch and the fuse at the same time.
  • Page 21 COMPONENTS TEST PROCEDURE RESULTS Check for P.C.B. connector. L.V.Transformer of P.C.B Normal Abnormal Disconnect the 3 pin (Refer to schemetic diagram) connector from P.C.B. 1 3 5 Cooking Start RELAY 2, RELAY 3 Relay 3 OF P.C.B. (Wire leads removed.) Relay 1 Note: Relay Relay 1: Fan motor...

  • Page 22: Trouble Shooting

    TROUBLE SHOOTING WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL. CAUTIONS 1. Check grounding before checking for trouble. 2.

  • Page 23: Measurement And Test

    (TROUBLE 1) The following visual conditions indicate a probable defective control circuit. 1. Incomplete segments. • Segment missing. • Partial segment missing. • Digit flickering (NOTE: Slight flickering is normal.) 2. Colon does not turn on or blink. 3. A distinct change in the brightness of one or more numbers in display. 4.

  • Page 24: Microwave Radiation Test

    (TROUBLE 2) Oven does not operate at all ; Display window does not display any figures and no input is accepted. CONDITION CHECK RESULT CAUSE REMEDY Replace primary Malfunction of the Check continuity 1. Fuse blows. Continuity. monitor switch. and monitor of monitor switches.

  • Page 25: Test Procedure

    (TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched. CONDITION CHECK RESULT CAUSE REMEDY Defective Replace Check continuity 1.Setting time does No continuity. secondary switch. secondary switch.

  • Page 26: Wiring Diagram

    (TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run (Display operates properly) CONDITION CHECK RESULT CAUSE REMEDY No microwave Disconnect the Defective P.C.B Replace P.C.B No continuity. oscillation. wire leads from assembly assembly relay 2 and check continuity Continuity.

Table of Contents