VMOS201
SERVICE MANUAL
S11326MOS201
MICROWAVE OVEN MODELS
VMOS201RR VMOS201PM VMOS201IB VMOS201SE VMOS201LE VMOS201MJ VMOS201VB VMOS201CB VMOS201MS VMOS201TP VMOS201CW VMOS201OG VMOS201SS VMOS201BK VMOS201WH VMOS201BT VMOS201SG VMOS201GG VMOS201BU VMOS201GM VMOS201SA VMOS201CH VMOS201PL VMOS201AR
In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the following parts may result in a severe, possibly fatal, electrical shock. (Inverter unit that includes High Voltage Capacitor, High Voltage Power Transformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High Voltage Harness etc..)
TABLE OF CONTENTS
| PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO |
|---|
| AVOID POSSIBLE EXPOSURETO EXCESSIVE MICROWAVE ENERGY..........................................................2 |
| BEFORE SERVICING............................................................................................................................................2 |
| WARNING TO SERVICE PERSONNEL.................................................................................................................4 |
| MICROWAVE MEASUREMENT PROCEDURE.....................................................................................................5 |
| FOREWORD AND WARNING ...............................................................................................................................7 |
| PRODUCT SPECIFICATIONS...............................................................................................................................8 |
| GENERAL INFORMATION....................................................................................................................................8 |
| OPERATION.........................................................................................................................................................10 |
| TROUBLESHOOTING GUIDE.............................................................................................................................14 |
| TEST PROCEDURE............................................................................................................................................15 |
| COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE.................................................................26 |
| PICTORIAL DIAGRAM.........................................................................................................................................32 |
| PARTS LIST ........................................................................................................................................................33 |
| PACKING AND ACCESSORIES ..........................................................................................................................37 |
Table Caption: This table appears to be a table of contents for a service manual, likely for a microwave oven, detailing sections on safety precautions, servicing procedures, specifications, operation, troubleshooting, and parts. It provides a structured overview of the information contained within the manual and the page numbers where each section can be found.
Page
This document has been published to be used for after sales service only.
1
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 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 generation 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.
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 Viking Service immediately @ 1-888-845-4641.
If the unit operates with the door open, service person should (1) tell the user not to operate the oven and (2) contact VIKING, plus the Department Of Health, Canada and/or the Food and Drug Administration's Center for Devices and Radiological Health immediately.
Service personnel should inform VIKING of any certified unit found with emissions in excess of 4mW/ cm 2 . The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.
DANGER CAUTION HIGH VOLTAGE
Do not energize a microwave oven with the outer case cabinet removed, because a microwave oven generates High Voltage in the circuit.
If you intend to operate the oven employing the high frequency switching power converter circuit, you should take special precautions to avoid an electrical shock hazard.
The high voltage transformer, high voltage capacitor and high voltage diode have energized high voltage potential approx. 8 KV.
The aluminium heat sink is connected to the switching power transistor Collector pole, and has an energized high voltage potential approx. 650V peak.
DO NOT ACCESS THE HIGH VOLTAGE
