MO30 STA NE BERTAZZONI SERVICE MANUAL S31M332MO30ST MICROWAVE OVEN MO30 STA NE 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.
MO30 STA NE 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.
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MO30 STA NE WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing 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. Don't Touch ! Danger High Voltage When the testing is completed, 1.
MICROWAVE MEASUREMENT PROCEDURE (CANADA) MO30 STA NE After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage test must be performed with survey instrument and test result must be confirmed to meet the requirement of the performance standard for microwave ovens as undermentioned. A.
MO30 STA NE MICROWAVE MEASUREMENT PROCEDURE (USA) A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm2 at 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/cm2 at any point 5cm or more from the external surface of the oven.
MO30 STA NE SERVICE MANUAL BERTAZZONI PRODUCT DESCRIPTION MICROWAVE OVEN MO30 STA NE GENERAL INFORMATION FOREWORD This Manual has been prepared to provide BERTAZZONI Service Personnel with Operation and Service Information for the BERTAZZONI MICROWAVE OVEN. It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service. Check the interlock switches and the door seal carefully.
SPECIFICATION MO30 STA NE ITEM Power Requirements Power Output Case Dimensions Cooking Cavity Dimensions 2.0 Cubic Feet Control Complement DESCRIPTION 120 Volts / 13.0 Amperes/1500Watts 60 Hertz Single phase, 3 wire grounded 1100 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Width 24" Height 13-3/8" Depth 19-1/4" Width 17-3/8" Height 10-1/2" Depth 18-5/8" Tray Size 15" Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min.
MO30 STA NE When installing this appliance, observe all applicable codes and ordinances. A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord. Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer to contact a qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding adapter properly grounded and polarized.
MO30 STA NE OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. 7. The monitor switch electrically monitors the operation of the primary switch and primary and is mechanically associated with the door so that it will function in the following sequence.
MO30 STA NE Cooking Sequence. 1. Touch one of the SENSOR pads and then touch the Start pad. NOTE: The oven should not be operated on SENSOR immediately after plugging in the unit. Wait two minutes before cooking on SENSOR. 2. The coil of shut-off relay (RY-1) is energized, the turntable motor, oven lamp and cooling fan motor are turned on, but the power transformer is not turned on. 3. After about 16 seconds, the cook relay (RY-2) is energized.
MO30 STA NE SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY NOTE: 1. 2. *3. CIRCUITS SUBJECT TO CHANGE WITHOUT NOTICE WIRE COLOR CODES ARE APPLICABLE TO PRIMARY CIRCUIT ONLY AND NOT APPLICABLE TO LOW VOLTAGE CIRCUIT AND SECONDARY CIRCUIT. HOT WIRE(S) MUST BE CONNECTED TO THE TERMINAL WITH BLUE MARK ON THE LAMP SOCKET AND "H" MARK ON THE POWER SUPPLY CORD. S E C ONDAR Y S WIT C H N MAG NE T R ON T E MP . F US E FM C AV IT Y T E MP . F US E 0.
DESCRIPTION AND FUNCTION OF COMPONENTS MO30 STA NE DOOR OPEN MECHANISM The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch head. The latch heads are moved upward and released from latch hook. Now the door will open. Latch Heads Door Sensing Switch Door Monitor Switch Secondary Switch Switch Lever Primary Switch Figure D-1.
MO30 STA NE TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the "Test Procedure "section.
MO30 STA NE CK = Check / RE = Replace TEST PROCEDURE POSSIBLE CAUSE AND DEFECTIVE PARTS PROBLEM CONDITION Home fuse or circuit breaker blows when power cord is plugged into wall receptacle. Monitor fuse blows when power cord is plugged into wall receptacle. OFF CONDITION Any letters or indicators do not appear in display when power cord is first plugged into wall outlet. Display does not operate properly when STOP/CLEAR key is touched.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm. 5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced. 6.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER C COMPONENT TEST HIGH VOLTAGE RECTIFIER TEST 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. Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER F COMPONENT TEST 8. Run the oven and check all functions. CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE TEMPERATURE FUSE. PRIMARY AND SECONDARY SWITCH TEST 1. 2. 3. 4. 5. 6. 7. 8. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Isolate the switch and connect the ohmmeter to the common (COM.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 6. Reinstall the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions. Screw Driver RED WHT/WHT Monitor Switch Ohmmeter Primary Interlock Switch H Secondary Interlock Switch BLOWN MONITOR FUSE TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST The following symptoms indicate a defective key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal. If the Key unit is defective. 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) Replace the Key unit.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 6. Re-install the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions.
TEST PROCEDURES MO30 STA NE PROCEDURE LETTER M COMPONENT TEST AH SENSOR TEST Checking the initial sensor cooking condition Warning: The oven should be fully assembled before following procedure. 1) The oven should be plugged in at least two minutes before sensor cooking. o o 2) Room temperature should not exceed 95 F(35 C). 3) The unit should not be installed in any area where heat and steam are generated. The unit should not be installed for example, next to conventional surface unit.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CHECKING CONTROL UNIT (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 sensor connector that is mounted to control panel. (5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel. (6) Disconnect the leads to the primary of power transformer.
MO30 STA NE TEST PROCEDURES PROCEDURE LETTER N COMPONENT TEST NOISE FILTER TEST 1. 2. 3. 4. 5. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Disconnect the leads to the primary of the power transformer. Using an ohm-meter, check between the terminals as described in the following table: N NOISE FILTER UNIT H MONITOR FUSE 0.22uF/ AC 250V NOISE SUPPRESSION COIL LINE CROSS CAPACITOR LINE BYPASS CAPACITOR 0.
MO30 STA NE ABSOLUTE HUMIDITY SENSOR CIRCUIT With this voltage given, the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R48 ~ R52 of IC1. Changing the resistance value results in that there is the same potential at both F-3 terminal of the absolute humidity sensor and AN6 terminal of the LSI. The voltage of AN5 terminal will indicat about 16 seconds about 2.50 V.
MO30 STA NE COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING AGAINST HIGH VOLTAGE: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1.
MO30 STA NE CAUTION: 1. Disconnect oven from power sup ply before removing outer case. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations. Special screw Screw Driver (Type: TORX T20 H or GTXH20-100) POWER TRANSFORMER REMOVAL Re-install 1. Rest transformer on the bottom plate with its primary terminals toward the oven face plate. 2.
MO30 STA NE OVEN LAMP AND LAMP SOCKET REMOVAL Terminals 1. Disconnect the power supply cord and remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Remove the wire leads from the oven lamp the terminal by pushing on the positive lock lever (Fig C-1). 5. Remove the screw holding the oven lamp, then remove lamp from the magnetron duct. 6. Now, the oven lamp is free to check or replace. Screw Oven lamp Figure C-1.
MO30 STA NE COOLING FAN MOTOR REMOVAL REMOVAL 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 wire leads from the fan motor. 5. Remove the two (2) screws holding the fan motor to the oven cavity back plate. 6. Remove the fan blade from the fan motor shaft according to the following procedure. 7. Hold the edge of the rotor of the fan motor by using a pair of groove joint pliers.
MO30 STA NE 3. Secure latch hook (with two (2) mounting screws) to oven flange. 4. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure. DOOR SENSING SWITCH/PRIMARY SWITCH/SECONDARY SWITCH AND MONITOR SWITCH ADJUSTMENT 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor.
MO30 STA NE SEALER FILM 6. Re-install choke cover to door panel by pushing. Note: After any service to the door; (A) Make sure that door sensing switch and secondary interlock switch are operating properly. (Refer to chapter “Test Procedures”.). (B) An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards. After any service, make sure of the following : 1.
1 2 3 4 32 GRY BLUE N.O. (POWER UNIT) T1 2 WHT ORG OVEN LAMP COM. 5 RED ORG PRIMARY SWITCH NO YLW ORG BLK BLK COM. NO BRN COM. SECONDARY SWITCH COM. GRY BLK TO CN-A on POWER UNIT Figure S-1. Pictorial Diagram N.C. RED BLK CAVITY TEMP. FUSE GRY BRN RED YLW WHT BLK TURNTABLE MOTOR WHT CN-B 1 PNK GRN GRN ORG COM. DOOR SENSING SWITCH MAGNETRON POWER TRANSFORMER H.V. RECTIFIER HIGH VOLTAGE WIRE A N.O.
MO30 STA NE PARTS LIST Note: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. REF. NO. PART NO.
MO30 STA NE REF. NO. PART NO.
MO30 STA NE 2 1 4 3 6 5 OVEN AND CABINET PARTS A A 7-5 7-5 7-7 2-3 B B 7-9 4-7 7-7 4-16 6-9 7-6 C 7-2 1-2 6-10 C 1-9 6-6 1-5 7-6 7-5 4-6 4-11 7-3 1-13 4-15 D 1-8 7-8 4-8 1-4 7-9 7-6 1-6 D 7-8 4-2 4-14 4-9 7-4 4-13 1-10 E 7-4 6-5 7-2 6-12 1-3 7-2 6-4 7-5 4-3 4-10 1-11 1-7 4-5 7-1 1-7 1-12 7-4 F E 1-6 6-3 F 1-7 7-1 4-4 2-1 4-1 1-1 G G 7-5 4-12 2-2 2-2 2-2 7-5 2-2 H 1 2 7-5 H 4 3 35 5 6
MO30 STA NE 2 1 4 3 6 5 CONTROL PANEL PARTS A A 3-1 3-2 6-11 3-5 3-5 B B 3-3 C C 3-4 D D 5-5 DOOR PARTS 5-4 5-1 E E F F 5-2 G MISCELLANEOUS 5-3 G 6-2 H H 6-8 1 2 4 3 36 Actual wire harness may be different from illustration.
MO30 STA NE PACKING AND ACCESSORIES TOP PAD ASSEMBLY DOOR PROTECTION SHEET 6-4 TURNTABLE TRAY PLASTIC BAG ON TOP OF THE OVEN TRAY HOLDER 6-7 OPERATION MANUAL IN TO E TH 6-1 RECIPE CARD 6-3 TURNTABLE SUPPORT PACKING CASE Non-replaceable items.
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MO30 STA NE COPYRIGHT © 2011 BY BERTAZZONI, INC. ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.
