V-ZUG Miwell V2000, CM2T-24021, CM2T-24022 Manual

WIRING DIAGRAM

*Note: The manual may update without prior notice. Please download the latest version of original files in this manual

INSTALLATIONS

INSTALLATION

1. Empty the appliance and clean inside it with a soft, damp cloth. Check for damage such as misaligned door, damage around the door or dents inside the cavity or on the exterior.
2. Put the appliance on a counter, table, or shelf that is strong enough to hold the appliance and the food and utensils you put in it. (The control panel side of the appliance is the heavy side. Use care when handling.)
3. Do not block the vent and the air intake openings. Blocking vent or air intake openings can cause damage to the oven and poor cooking results. Make sure the microwave oven legs are in place to ensure proper air flow.
4. The appliance should not be installed in any area where heat and steam are generated, because they may damage the electronic or mechanical parts of the unit. Do not install the oven next to a conventional surface unit or above a conventional wall oven.
5. Use the appliance in an ambient temperature less than 104°F(40°C).
   

Note: The figure above is shown as a sample, for specific model please refer to the instruction manual.

EARTHING INSTRUCTIONS
This microwave oven is designed to be used in a fully earthed condition.
It is imperative, therefore, to make sure it is properly earthed before servicing

THIS APPLIANCE MUST BE EARTHED

The wires in this mains lead are colored in accordance with the following code:

As the colors of the wires in the mains lead of this appliance may not correspond with the colored markings identifying the terminals in your plug, proceed as follows.
The wire which is colored green-and-yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol () or colored green or green-and-yellow.
The wire which is colored blue must be connected to the terminal in the plug which is marked with the letter N or colored black.
The wire which is colored brown must be connected to the terminal in the plug which is marked with the letter L or colored red

SERVICE INFORMATION

TOOLS AND MEASURING INSTRUMENTS

NECESSARY TOOLS
Tools normally used for TV servicing are sufficient. Standard tools are listed below.

• Diagonal pliers
• Long nose pliers
• Phillips screwdriver
• Flat blade screwdriver
• Wrench (size 5mm)
• Nutdriver (size 5mm)
• Adjustable wrench
• Soldering iron
• Solder
• Vinyl insulation tape
• Polishing cloth

NECESSARY MEASURING INSTRUMENTS

• TESTER(VOLTS-DC, AC., Ohmmeter)
• Isolation tester (500VDC, 100MOhm)
• Microwave survey meter
  • Holaday HI-1500 HI-1501
  • Narda 8100 8200
• Inch scale
• 600 cc nonconductive material beaker (glass or plastic), inside diameter: approx. 8.5 cm (3 1/2 in.)
• Cylindrical and made of borosilicate glass vessel. max. thickness: 3 mm outside diameter: approx. 190mm height: approx. 90mm
• Glass thermometer: 100°C or 212°F (1 deg scale)

MICROWAVE LEAKAGE TEST

• Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to servicing.
• The service personnel should inform the manufacture importer, or assembler of any certified oven unit found to have a microwave emission level in excess of 5 mW/cm² and should repair any unit found to have excessive emission levels at no cost to the owner and should ascertain the cause of the excessive leakage. The service personnel should instruct the owner not to use the unit until the oven has been brought into compliance.
• If the oven operates with the door open, the service personnel should:
  • Tell the user not to operate the oven.
  • Contact the manufacturer.
• The service personnel should check all surface and vent openings for microwave leakage.
• Check for microwave leakage after every servicing. The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 4 mW/cm². Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage.

MEASURING MICROWAVE ENERGY LEAKAGE

• Pour 275±15cc of 20±5°C(68±9°F) water in a glass container which is graduated to 600 cc, and place the container on the center of the turntable.
• Set the energy leakage monitor to 2450 MHz and use it following the manufacturer's recommended test procedure to assure correct result.
• When measuring the leakage, always use the 2- inch (5cm) spacer supplied with the probe.
• Operate the oven at its maximum output.
• Measure the microwave radiation using and electromagnetic radiation monitor by holding the probe perpendicular to the surface being measured
  Move probe along shaded area
  Probe scanning speed
  

MEASUREMENT WITH OUTER CASE REMOVED

• When you replace the magnetron, measure for microwave energy leakage before the outer case is installed and after all necessary components are replaced or adjusted.
  Special care should be taken in measuring the following parts. (Circled area of below Fig.)
  • Around the magnetron
  • The waveguide

AVOID CONTACTING ANY HIGH VOLTAGE PARTS

MEASUREMENT WITH A FULLY ASSEMBLED OVEN

• After all components, including the outer case, are fully assembled, measure for microwave energy leakage around the door viewing window, the exhaust opening, and air inlet openings.
• Microwave energy leakage must not exceed the values prescribed below.

NOTE: Leakage with the outer case removed must be less than 5 mW/cm² . Leakage for a fully assembled appliance (Before the latch switch (primary) is interrupted) with the door in a slightly opened position-less than 2 mW/cm² .sq.

NOTES WHEN MEASURING

• Do not exceed meter full scale deflection.
• The test probe must be moved no faster than 1 inch/sec (2.5 cm/sec) along the shaded area, otherwise a false reading may result.
• The test probe must be held with the grip portion of the handle.
  A false reading may result if the operator's hand is between the handle and the probe.
• When testing near a corner of the door, keep the probe perpendicular to the surface making sure the probe is positioned horizontally along the oven surface

RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT

• After adjustment and repair of any microwave energy interruption or microwave energy blocking device, record the measured values for future reference. Also enter the information on the service invoice.
• The microwave energy leakage should not be more than 4 mW/cm² after determining that all parts are in good condition, functioning properly and genuine replacement parts which are listed in this manual have been used.
• At least once a year, have the electromagnetic energy leakage monitor checked for calibration by its manufacturer.

DISASSEMBLY AND ADJUSTMENT

1. OUTER CASE REMOVAL
   1. Disconnect the power supply cord from the power s uppl y.
   2. Remove the screws from the rear and along the edges of the case.
2. POWER SUPPLY CORD REMOVAL
   1. Remove the top outer case.
   2. Disconnect two terminals and remove the screw of the earth terminal.
      
      DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICE

3. CONTROL PANEL REMOVAL
   1. Disconnect the wire from the c ontr ol PCB.
   2. Remove the screws s ec ur i ng the control panel.
   3. Lift control panel from the appliance

4. DOOR ASSEMBLY REMOVAL
   1. Open the door.
   2. Unlock Hinge to the Cavity
   3. Close half and lift the door to remove it from the cavity

NOTE:

1. After replacing the door, be sure to check that the primary switch, monitor switch, and secondary switch operate normally.
2. After replacing the door, check for microwave energy leakage. Microwave energy l eak age must be below the limit of 5 mW/cm. (with a 275 ml water load)
3. When mounting the door assembly to the oven assembly, be sure to adjust the door assembly parallel to the chassis. Chec k fi x ur e of door hi nge after mounti ng the door. If the door is not mounted properly, microwaves may leak from the clearance between the door and the oven.
   
   

5. HIGH VOLTAGE TRANSFORMER REMOVAL
   1. Discharge the high voltage capacitor.
   2. Disconnect the leadwire from magnetron, high voltage transformer, and capacitor.
   3. Remove the screw holding the high voltage transformer to the baseplate.
6. AIR GUIDE ASSEMBLY REMOVAL
   1. Discharge the high voltage capacitor.
   2. Disconnect the leadwire from fan motor, noise filter and high voltage capacitor.
   3. Remove the two screws holding the Air Guide ASS'Y to the oven cavity and remove the high voltage diode earth screw.
   4. Remove the screw of the capacitor bracket.
   5. Remove the two screws holding the fan motor ASS'Y to the Air Guide ASS'Y.
7. H.V. CAPACITOR AND DIODE REMOVAL
   1. Discharge the high voltage capacitor.
   2. Disconnect the leadwire from fan motor, noise filter and high voltage capacitor.
   3. Remove the screw holding the Air Guide ASS'Y to the oven cavity and remove the high voltage diode earth screw.
   4. Remove the screw holding the high voltage capacitor bracket.
      
8. MAGNETRON REMOVAL

10. TURNTABLE MOTOR REMOVAL
    1. Remove the glass tray.
    2. Remove the pulley shaft VERY CAREFULLY
    3. Lay the unit down on its back.
    4. Remove the turntable motor cover. The turntable base cover is easily removed by pinching the six parts with a wire cutting.
    5. Disconnect the leadwire from the turntable motor terminals.
    6. Remove the screw securing the turntable motor to the oven cavity ASS'Y
    7. After replacing the motor, rotate the removed turntable motor cover.
    8. Fit the turntable motor cover's projecting part to the base plate slit.

NOTE:

1. Remove the wire lead from the turntable motor VERY CAREFULLY.
2. Be sure to grasp the connector, not the wires, when removing

11. POWER PCB ASSEMBLY REMOVAL
    1. Remove the outer case of the appliance
    2. Remove screws which hold the PCB to the air guide
    3. Disconnect all cables from the PCB and remove the PCB.
12. INTERLOCK SYSTEM
    1. INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to stop microwave activity when the door is opened during operation and thus to prevent the danger resulting from microwave.
    2. MOUNTING OF THE PRIMARY/MONI T O R/ SECONDARY SWITCHES TO THE LATCH BOARD
       

INSTALLATION AND ADJUSTMENT OF THE LATCH BOARD TO THE OVEN ASSEMBLY

• Mount the latch board to the oven assembly.
• Adjust the latch board in the arrow direction so that oven door will not have any play in it when the door is closed.
• Tighten the mounting screw.
• Check for play in the door by pull the door handle. Door movement should be less than 0.5 mm. (1/64 inch) Don't pull the door handle while making adjustment. Make sure that the latch moves smoothly after adjustment are completed and that the screws are tight. Make sure the primary, monitor, and secondary switches operate properly by following the int erloc k continuity test procedure.

CONVECTION ASSEMBLY REMOVAL

1. Remove screws at the Backplate
2. Remove the heat insulator then the convection assembly.

INTERLOCK CONTINUITY TEST

FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS.

1. PRIMARY INTERLOCK SWITCH TEST
   If the latches do not activate the switches when the door is closed, the switches should be a adjusted in accordance with the adjustment procedure. Disconnect the wire lead from the primary switch. Connect the ohmmeter leads to the common (COM) and normally open (NO) terminal of the switch. The meter should indicate an open c irc uit in the door open condition. When the door is closed, the meter should indicate a closed circuit. When the primary switch operation is abnormal, make the necessary adjustment or replace the switch only with the same type of switch.

2. SECONDARY INTERLOCK SWITCH TEST
   Disconnect the wire lead from the secondary switch. Connect the ohmmeter leads to the common (COM) and normally open (NO) terminals of the switch. The meter should indicate an open circuit in the door open condition. When the door is closed, meter should indicate a closed circuit. When the secondary switch operation is abnormal, make the necessary adjustment or replace the switch only with the same type of switch.
3. MONITOR SWITCH TEST
   Disconnect the wire lead from the monitor switch. Connect the ohmmeter leads to the common (COM) and normally closed (NC) terminals of the switch. The meter should indicate closed circuit in the door open condition. When the door is closed, meter should indicate an open circuit. When the monitor switch operation is abnormal, replace with the same type of switch.
   NOTE: After repairing the door or the interlock system, it is necessary to do this continuity test before operating the oven.

COMPONENTS	TEST PROCEDURE		RESULTS
SWITCHES (Wireleads removed)	Check for continuity of the switch with an Ohm-meter		Door open	Door closed
	Primary Switch
	Monitor Switch
	Secondary Switch
	NOTE: After checking for the continuity of switches, make sure that are correctly connected.

COMPONENT TEST PROCEDURE

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.
2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN GLASS CONTAINER) IN THE CAVITY.

COMPONENTS	TEST PROCEDURE	RESULTS
HIGH VOLTAGE TRANSFORMER (Wire leads removed) * It depens on H.V.T Spec.	Measure the resistance. (Ohm-meter scale: Rx1) Primary winding Secondary winding Filament winding Measure the resistance. (Ohm-meter scale: Rx1000) Primary winding to ground Filament winding to ground	Approx.: 1.93 ohm Approx.: 162 ohm Less than: 1 ohm Normal: Infinite Normal: Infinite
MAGNETRON (Wireleads removed)	Measure the resistance. (Ohm-meter scale: Rx1) Filament terminal Measure the isolation. (500V-100M ohm insulation resistance meter) Filament to chassis 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.	Normal: Less than 1 ohm Normal: Infinite
HIGH VOLTAGE CAPACITOR	Measure the resistance. (Ohmmeter scale: Rx1000) Terminal to terminal.	Normal: Momentarily indicates several ohms, and then gradually returns to 10M ohms.
	Measure the isolation. (500V-100M ohm insulation resistance meter) Terminal to case.	Normal: ∞
HIGH VOLTAGE DIODE * NOTE : Some inexpensive meters may indicate infinite resistance in both direction.	Measure the continuity (Forward). (Ohm-meter scale: Rx10000)	Normal: Continuity. Abnormal: ∞ *
	Measure the continuity (Reverse). (Ohm-meter scale: Rx10000)	Normal: ∞ Abnormal: Continuity.

Oven is operating but output power is low

Grill malfunction

Convection malfunction

• NEVER put iron tools on the magnetron.
• NEVER put anything into the latch hole and the interlock switches area.
• When repairing product, professional maintenance personnel need to wear protective gloves.

MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating device if it is improperly used or connection. All input and output microwave connections, waveguide, flange and gasket must be secure never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.