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MICROWAVE OVEN SERVICE MANUAL
MODEL : MB-1142DP MB-1142BP
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SAFETY PRECAUTIONS
This device is to be serviced only by properly qualified service personnel. Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy.
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.
CONTENTS
(Page)
SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1 CAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1 INSTALLATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1 OPERATING INSTRUCTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
FEATURES- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1 CONTROL PANEL - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1 OPERATING SEQUENCE- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-2 SCHEMATIC DIAGRAM - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-3 CIRCUIT DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-4
SERVICE INFORMATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
TOOLS AND MEASURING INSTRUMENTS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1 MICROWAVE LEAKAGE TEST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1 MEASUREMENT OF MICROWAVE POWER OUTPUT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3 DISASSEMBLY AND ADJUSTMENT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3 INTERLOCK CONTINUITY TEST- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-7 COMPONENT TEST PROCEDURE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-8 TROUBLE SHOOTING - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-12
EXPLODED VIEW - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1 REPLACEMENT PARTS LIST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1 SCHEMATIC DIAGRAM OF P.C.B. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-1
PRINTED CIRCUIT BOARD - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2
P.C.B. PARTS LIST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9-1
SPECIFICATIONS
ITEM
MODEL
Power Requirement
DESCRIPTION
MB-1142DP/MB-1142BP
120 Volts AC 60 Hz MICROWAVE GRILL 1,400 Watts (12.0) 1,000 Watts
Single phase, 3-wire grounded Power Output Microwave Frequency Magnetron Timer Outside Dimensions Cavity Dimensions Net Weight Shipping weight Control Complement 1,000 Watts full microwave power (IEC60705) 2,450 MHz 2M246 0 ~ 99 min. 99 sec. 530 (W) x 313 (H) x 394 (D) 348 (W) x 222 (H) x 365 (D) 16.3 kg (approx.) 18.3 kg (approx.) Touch Control System Clock : 1:00 - 12:59 Microwave Power for Variable Cooking Power level HIGH ----------------------------------------Full power throughout the cooking time 9 (Saute) -------------------------approx. 90% of Full power, 7 (Med.-High) --------------------approx. 70%, 5 (Med.-Low) --------------------approx. 50%, 3 (Low) ---------------------------approx. 30%, 1 (Warm)--------------------------approx. 10% Nameplate Location 8 (Reheat) --------approx. 80% 6 (Medium) --------approx. 60% 4 (Defrost) ---------approx. 40% 2 (Simmer)--------approx. 20%
Back Side
Owner's manual & cooking guide Accessories Glass turntable Rotating ring Grill Rack This microwave oven is designed for household use only. It is not recommended for commercial purposes.
1-1
CAUTIONS
Unlike other appliances, the microwave oven is high-voltage and high-current equipment. Though it is free from danger in ordinary use, extreme care should be taken during repair.
· DO NOT operate on a 2-wire extension cord during repair and use. · NEVER TOUCH any oven components or wiring during operation. · BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet. · For about 30 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must discharge the high voltage capacitor by shorting across the two terminals with an insulated screwdriver.
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. · Proper operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity. Never operate the magnetron unless it is properly installed. · Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron.
ANTENNA
Gasket
COOLING FIN FILAMENT TERMINALS MAGNETRON CHASSIS GROUND
· Remove your watches whenever working close to or replacing the Magnetron. · DO NOT touch any parts of the control panel circuit. A resulting static electric discharge may damage this P.C.B. · NEVER operate the oven with no load. · NEVER injure the door seal and front plate of the oven cavity. · NEVER put iron tools on the magnetron. · NEVER put anything into the latch hole and the interlock switches area.
MAGNETRON
THE OVEN IS TO BE SERVICED ONLY BY PROPERLY QUALIFIED SERVICE PERSONNEL.
2-1
INSTALLATIONS
BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.
INSTALLING
1. Empty the microwave oven 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 oven on a counter, table, or shelf that is strong enough to hold the oven and the food and utensils you put in it. (The control panel side of the oven 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 oven 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 microwave oven in an ambient temperature less than 104°F (40°C). 6. Place the microwave oven on a sturdy and flat surface at least 10 cm (4 inches) from the wall. 7. Place the microwave oven as far away as possible from TV, RADIO, COMPUTER, etc., to prevent interference.
GROUNDING INSTRUCTIONS
For personal safety, this appliance must be fully grounded at all times. In the event of an electrical short circuit, grounding reduces the risk of electrical shock. The plug must be plugged into an outlet that is properly installed and grounded.
WARNING
Improper use of the grounding plug can result in a risk of electric shock. Do not, under any circumstances, cut or remove the third ground prong from the power cord plug.
PREFERRED METHOD
ENSURE PROPER GROUND EXISTS BEFORE USE
10cm
3-1
OPERATING INSTRUCTIONS
FEATURES
OVEN CAVITY DOOR SEAL
DISPLAY WINDOW CONTROL PANEL
GLASS TURNTABLE SAFETY INTERLOCK SYSTEM ROTATING RING
GRILL RACK
CONTROL PANEL
1. INDICATORS. 2. LOCAL MENU: This menu has been preprogrammed to cook food automatically by one touch. 3. GRILL. 4. COMBI.
1
5. OPTION: You can select sound ON/OFF, demo ON/OFF and scroll speed. 6. TIEMPO: This feature is used for manual cooking or 2 stage cooking.
2
7. HOLD WARM: You can keep the food warming by this key. 8. AUTO DEFROST: This feature provides you with the best defrosting method for frozen foods.
5 6 8 4 3 7 9 11 10 12 13 14
9. QUICK DEFROST: This feature provides you with the quick defrosting method for 0.5kg of beef. 10. NUMBER: These used to set for time of day, cooking time & power level, or defrost weight. 11. POWER: You can select the desired power level for cooking. 12. CLOCK: It is used to set the time of day. 13. START: This feature allows oven to begin functioning. 14. STOP/CLEAR: It used to stop oven and clear all entries except time of day.
4-1
OPERATING SEQUENCE
The following is a description of component functions during oven operation.
7. AUTO WEIGHT DEFROST COOKING
PARAR/BORRAR DESCONGELADO AUTO. NUMBER OF WEIGHT INICIO
1. SETTING THE CLOCK
PARAR/BORRAR RELOJ NUMBER INICIO
8. CHILD LOCK
ex.) To set 4:30, touch number key [4],[3], and [0]. NOTE: 1) Clock will operate as long as power is applied to the oven. This oven has a CHILD LOCK feature TO SET CHILD LOCK · Touch the PARAR/BORRAR pad · Touch and hold PARAR/BORRAR pad BLOQUEADO appear on the display. TO CANCEL CHILD LOCK · Touch the PARAR/BORRAR pad · Touch and hold PARAR/BORRAR pad DESBLOQUEADO disappears.
2. CANCEL FUNCTION
Touch the PARAR/BORRAR pad whenever you need to cancel an entry or a function currently in use. The display will either return to the last item entered or to the clock.
3. QUICK START
PARAR/BORRAR Más Segundos
9. OPTION
You can select ON/OFF of beeper, ON/OFF of demo and scroll speed. · To select sound ON/OFF
4. ONE TOUCH COOKING
PARAR/BORRAR PASTEL DE ACELGA
PARAR/BORRAR
OPCIÓN
INICIO
· To select scroll speed. PARAR/BORRAR OPCIÓN OPCIÓN NUMBER
5. TIME COOKING
PARAR/BORRAR MICRO NUMBER NUMBER INICIO PARAR/BORRAR OPCIÓN OPCIÓN OPCIÓN POTENCIA INICIO · To select demo ON/OFF.
6. MULTI-STAGE COOKING
1ST STAGE
PARAR/BORRAR MICRO NUMBER NUMBER POTENCIA
INICIO
2ND STAGE
MICRO NUMBER NUMBER INICIO POTENCIA
4-2
20A
SCHEMATIC DIAGRAM
IMPORTANT SAFETY NOTE: THE SHADED AREAS ON THIS SCHEMATIC DIAGRAM INCORPORATE SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM MICROWAVE RADIATION, FIRE, ELECTRICAL SHOCK, AND HAZARDS. WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURER S SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC DIAGRAM.
NOTICE: SINCE THIS IS BASIC SCHEMATIC DIAGRAM, THE VALUES OF COMPONENTS AND SOME PARTIAL CONNECTIONS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
4-3
CIRCUIT DESCRIPTION
GENERAL DETAILS
· The low voltage transformer supplies the necessary voltage to the micom controller when power cord is plugged in. · When the door is closed, the primary switch is ON, the secondary switch is ON, and the monitor switch opens (contact COM and NO). · A high voltage of approximately 2100 volts AC is generated in the secondary of the high voltage transformer which is increased by the action of the high voltage diode and charging of the high voltage capacitor. · The negative 4,000 Volts DC is applied to the filament of the magnetron.
WHEN SELECTING COOKING POWER LEVEL AND TIME
· The micom controller memorizes the function you set. · The time you set appears in the display window. · Each indicator light turns on to indicate that the stage has been set.
WHEN THE OVEN IS SET AT ANY LEVEL EXCEPT MAXIMUM.
· The micom controller controls the ON-OFF time of relay 2 by the applied signal to vary the average output power of microwave oven as POWER LEVEL. (refer to page 1-1) · One complete cycle of the relay 2 is 22 seconds.
WHEN TOUCHING THE START PAD
· The coil of the relay is energized by the micom controller. · Power input is supplied to the high voltage transformer through the fuse to the primary switch and relay 2. · Turntable rotates.
PRIMARY SWITCH
WHEN THE DOOR IS OPENED DURING COOKING
· Both the primary switch and relay 2 cut off the primary winding voltage of the high voltage transformer. · ON-OFF of relay 2 is coupled electrically with opening and closing of the secondary switch. · When the door is opened, the secondary switch is opened and when the door is closed, the secondary switch is closed. · The cooking time stops counting down. · Relay stops functioning. · As the door is opened, if the contact of primary switch and relay 2 and/or secondary switch fail to open, the fuse opens due to the large current surge caused by the monitor switch activation, which, in turn, stops magnetron oscillation.
FUSE
L
MONITOR SWITCH H.V. TRANSFORMER
N
RELAY 2
SECONDARY SWITCH
FUSE
PRIMARY SWITCH
MICOM CONTROLLER
L
MONITOR SWITCH H.V. TRANSFORMER
· The fan motor rotates and cools the magnetron by blowing air (coming from the intake on the base-plate). · The air is also directed into the oven to exhaust the vapor in the oven through the upper plate. · Cooking time starts counting down. · 3.3 volts AC is generated from the filament winding of the high voltage transformer. This 3.3 volts is applied to the magnetron to heat the magnetron filament through two noise-preventing choke coils.
N
RELAY 2
SECONDARY SWITCH
MICOM CONTROLLER
4-4
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) · Microwave survey meter - Holaday HI-1500 HI-1501 - Narda 8100 8200 · Inch scale · 600 cc non conductive material beaker (glass or plastic), inside diameter: approx. 8.5 cm (31/2 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
CAUTIONS
· 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 beaker which is graduated to 600 cc, and place the beaker on the center of the turntable. · Set the energy leakage monitor to 2,450 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 Less than 2.5 cm/sec (1 in/sec)
5-1
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 Fig. below) - Around the magnetron - The waveguide
NOTES WHEN MEASURING
· Do not exceed meter full scale deflection. · The test probe must be removed 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 horizontally along the oven surface; this may cause probe damage.
WARNING : AVOID CONTACTING ANY HIGH VOLTAGE PARTS
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/cm.sq. 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.
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 less than 5 mW/cm.sq. Leakage for a fully assembled oven (Before the latch switch (primary) is interrupted) with the door in a slightly opened position-less than 2 mW/cm.sq.
5-2
MEASUREMENT OF MICROWAVE POWER OUTPUT
· Microwave power output measurement is made with the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water. · The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190mm. · The oven and the empty vessel are at ambient temperature prior to the start of the test. · The initial temperature (T1) of the water is (10±2)°C It is measured immediately before the water is added to the vessel. After addition of the water to the vessel, the load is immediately placed on the center of the turntable which is in the lowest position and the microwave power switched on. · The time T for the temperature of the water to rise by a value T of (10±2)° is measured, where T is the time in seconds and T is the temperature rise. The initial and final water temperatures are selected so that the maximum difference between the final water temperature and the ambient temperature is 5°.
· The microwave power output P in watts is calculated from the following formula : P= 4187 x (T) T
is measured while the microwave generator is operating at full power. Magnetron filament heat-up time is not included. (about 3 sec) · The water is stirred to equalize temperature throughout the vessel, prior to measuring the final water temperature. · Stirring devices and measuring instruments are selected in order to minimize addition or removal of heat. WATER LOAD
TURNTABLE
DISASSEMBLY AND ADJUSTMENT
A. OUTER CASE REMOVAL
1) Disconnect the power supply cord from the outlet. 2) Remove the screws from the rear of the case. The outer case must be moved backward to be lifted off. Remove the screw
securing screw
B. POWER SUPPLY CORD
1) Remove the outer case. 2) Disconnect two terminals and remove one screw of the ground terminal.
C. CONTROL PANEL ASSEMBLY
1) Open the door. 2) Disconnect the leadwire from RELAY (RY2) of the PCB SUB ASSEMBLY. 3) Disconnect the leadwire from connector (CN1) of the PCB SUB ASSEMBLY. 4) Lift up and pull out control panel assembly carefully from the cavity. CAUTION: DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING (refer to page 2-1)
ground screw
Lift up and pull out control panel
5-3
D. PCB ASSEMBLY REMOVAL
1) Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.) 2) Remove screws which hold the PCB SUB ASSEMBLY to the control panel. 3) Disconnect the flat cable from the PCB SUB ASSEMBLY and take off the PCB SUB ASSEMBLY.
Remove choke cover
Remove door
Door seal plate
E. DOOR MAIN ASSEMBLY REMOVAL
1) Open the door. 2) Remove the choke cover very carefully with a flat-blade screwdriver. CAUTION: Be careful not to damage door seal plate by screwdriver. 3) Lift up and push the door. 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 with a survey meter. Microwave energy must be below the limit of 4 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. Also, adjust so the door has no play between the inner door surface and oven frame assembly. If the door assembly is not mounted properly, microwaves may leak from the clearance between the door and the oven. Spacer
5-4
F. MAGNETRON REMOVAL
1) Disconnect the leadwire from the magnetron. 2) Carefully remove the mounting screws holding the magnetron and the waveguide. 3) Remove the magnetron ASSEMBLY until the tube is clear from the waveguide. NOTE: 1. When removing the magnetron, make sure its dome does not hit any adjacent parts, or it may be damaged. 2. When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition. 3. After replacing the magnetron, check for microwave leakage with a survey meter around the magnetron. Microwave energy must be below the limit of 5 mW/cm2. (With a 275 ml. water load). Make sure that gasket is rigidly attached to the magnetron. To prevent microwave leakage, tighten the mounting screws properly, making sure there is no gap between the waveguide and the magnetron.
G. REMOVING THE TURNTABLE MOTOR
1) Remove the turntable and rotating ring. 2) Lay the unit down on its back. 3) Remove the turntable motor cover. The turntable base cover is easily removed by pinching the eight parts with a wire cutting. 4) Disconnect the leadwire from the turntable motor terminals. 5) Remove the screw securing the turntable motor to the oven cavity ASSEMBLY. 6) After repairing the motor, rotate the removed turntable motor cover. 7) 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.
Air Duct
Magnetron
Waveguide Dome Waveguide Bracket Magnetron Gasket Magnetron
Turntable Motor
Wire Leads
5-5
H. 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.
K. INTERLOCK SYSTEM
1) INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting from the microwave leakage. 2) MOUNTING OF THE PRIMARY/MONITOR/ SECONDARY SWITCHES TO THE LATCH BOARD 3) 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 pushing the door release button. Door movement should be less than 0.5 mm. (1/64 inch) Don't push the door release button while making this adjustment. Make sure that the latch moves smoothly after adjustment is completed and that the screws are tight. Make sure the primary, monitor, and secondary switches operate properly by following the continuity test procedure.
I. FAN MOTOR ASSEMBLY REMOVAL
1) Discharge the high voltage capacitor. 2) Disconnect the leadwire from fan motor and high voltage capacitor. 3) Remove the two screws holding the the suction guide ASSEMBLY to the oven cavity. 4) Remove the two screws holding the fan motor ASSEMBLY to the suction guide ASSEMBLY.
J. HIGH VOLTAGE CAPACITOR AND DIODE REMOVAL
1) Discharge the high voltage capacitor. 2) Disconnect the leadwire from fan motor and high voltage capacitor. 3) Remove the screw holding the suction guide ASSEMBLY to the oven cavity. 4) Remove the screw holding the high voltage capacitor bracket and remove the high voltage diode earth screw.
Fan Motor ASS'Y
ADJUSTMENT DIRECTION
Suction Guide
SECONDARY SWITCH
H.V . Capacitor H.V . Transformer H.V . Diode
MONITOR SWITCH PRIMARY SWITCH
5-6
INTERLOCK CONTINUITY TEST
WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS. ALL THESE SWITCHES MUST BE REPLACED AT THE SAME TIME.
TYPE NO. SZM-V 16-FA-63 OR VP-533A-OF FOR PRIMARY SWITCH TYPE NO. SZM-V 16-FA-62 OR VP-532A-OF FOR MONITOR SWITCH TYPE NO. SZM-V 16-FA-63 OR VP-533A-OF FOR SECONDARY SWITCH
A. PRIMARY INTERLOCK SWITCH TEST
When the door release button is depressed slowly with the door closed, an audible click should be heard at the same time or successively at intervals. When the button is released slowly, the latches should activate the switches with an audible click. 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 circuit 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.
B. 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 a open circuit in the door open condition. When the door is closed, meter should indicate an closed circuit. When the secondary switch operation is abnormal, make the necessary adjustment or replace the switch only with the same type of switch.
C. 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
SWITCHES (Wire leads removed)
TEST PROCEDURE
Check for continuity of the switch with an Ohm-meter Primary Switch
NO COM
RESULTS
Door open Door closed
Monitor Switch Secondary Switch
NC COM
NO COM
NOTE : After checking for the continuity of switches, make sure that they are connected correctly.
5-7
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. (SEE PAGE 2-1) 2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN.
COMPONENTS
HIGH VOLTAGE TRANSFORMER (Wire leads removed)
TEST PROCEDURE
RESULTS
FILAMENT WINDING
PRIMARY TERMINAL
1. Measure the resistance. (Ohm-meter scale: Rx1 and Rx100) · Primary winding · Secondary winding · Filament winding 2. Measure the resistance. (Ohm-meter scale: Rx1000) · Primary winding to ground · Filament winding to ground MAGNETRON (Wire leads removed) 1. Measure the resistance. (Ohm-meter scale: Rx1) · Filament terminal 2. Measure the resistance. (Ohm-meter scale: Rx1000) · Filament to chassis
Approx.: 0.2 ~ 0.4 ohm Approx.: 60 ~ 90 ohm Less than: 1 ohm
Normal: Infinite Normal: Infinite
Normal: Less than 1 ohm
Normal: Infinite
5-8
COMPONENTS
TEST PROCEDURE
Antenna Gasket Chassis
RESULTS
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 CAPACITOR Measure the resistance. (Ohm-meter scale: Rx1000) · Terminal to terminal. Normal: Momentarily indicates several ohms, and then gradually returns to infinite.
Measure the resistance. (Ohm-meter scale: Rx1000) · Terminal to case.
Normal: Infinite.
HIGH VOLTAGE DIODE
Measure the continuity (Forward). (Ohm-meter scale: Rx10000)
Normal: Continuity. Abnormal: Infinite.
NOTE : Some inexpensive meters may indicate infinite resistance in both direction.
Measure the continuity (Reverse). (Ohm-meter scale: Rx10000)
Normal: Infinite. Abnormal: Continuity.
5-9
COMPONENTS
HEATER ELEMENT (Wire leads removed.)
TEST PROCEDURE
Measure the resistance. (Multi-meter scale:RX1) Normal:
RESULTS
Gill heater Approx.15 ½ (at 20-30ûC)
Measure the resistance with 500V-100M Ohm insulation resistance meter.
Normal: more than 1.0M ½
NOTE: Make sure heater is fully cooled when tested.
THERMOSTAT
0ûC~Approx 110ûC
Over 110ûC
FUSE (Wire leads removed.)
Check the continuity of the switch with an Multi-meter
Normal
Abnormal
NOTE: If the fuse is blown, check primary, the secondary, 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. Replace just the fuse if the switches operate normally.
5-10
COMPONENTS
RELAY 2
TEST PROCEDURE
Check for continuity of relay 2 with an ohm-meter. (Remove wire leads from relay 2 and operate the unit.) POWER LEVEL 1 2 3 4 5 6 7 8 9 10
RESULTS
4 sec 6 sec 8 sec 10 sec 12 sec 14 sec 16 sec 18 sec 20 sec 22 sec
18 sec 16 sec 14 sec 12 sec 10 sec 8 sec 6 sec 4 sec 2 sec 0 sec
Relay 2
Measure the resistance. (Ohm-meter scale: R x 1) Normal: A: Approx. 85 ~ 100 ohm. B: Approx. 10 ~ 25 ohm. Abnormal: Infinite or several ohms.
FAN MOTOR (Wire leads removed)
B
A
TURNTABLE MOTOR (Wire leads removed)
Measure the resistance. (Ohm-meter scale: R x 1 )
Normal: Approx.100~150 ohm Abnormal: Infinite or several ohm.
NOTE : · A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. · MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION. · WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, NOT THE WIRES.
5-11
TROUBLESHOOTING
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. Be careful of the high voltage circuit. 3. Discharge the high voltage capacitor. (See page 2-1) 4. When checking the continuity of the switches or of the high voltage transformer, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter. 5. Do not touch any part of the circuit on the PCB since static electric discharge may damage this control panel. Always touch yourself to ground while working on this panel to discharge any static charge built up in your body. (Micom model only)
CONDITION
Microwave oven does not work.
CAUSE
Inserting many plugs into one outlet and using them at the same time. (blown fuse or breaker) Microwave oven plug is not inserted tightly.
REMEDY
Avoid using other electrical appliances when you use the microwave oven.
Insert microwave oven plug securely. Use the microwave oven at adequate line voltage. This may not be a defect. It is possible that the food should be cooked for a longer time period. Do not use metallic ware for cooking except that noted in the cooking guide. Do not use any type of cookware with metallic trimming. 1. Use plastic wrap or lid. 2. Stir once or twice while cooking soup, cocoa or milk, etc.
Output power is too low.
Low AC input voltage.
Food temperature is too low.
Sparks occur.
Using metallic ware and allowing it to touch the oven wall. Ceramic ware trimmed in gold or silver powder is used.
Uneven cooking.
Inconsistent intensity of microwave by their characteristics.
5-12
(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. One or more digits in the display are not lighting. 5. Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display. 6. Specific numbers (for example 7 or 9) will not display when key pad is touched. 7. Display does not count down with time blinking or up with clock operation. 8. Display obviously jumps in time while counting down. 9. Display counts down too fast while cooking. 10. Each indicator light does not turn on after setting cooking cycle. 11. Display time of day does not reappear when cooking is finished.
CONDITION
1. No input can be programmed.
CHECK
Check the connection between membrane key assembly and PCB assembly. Replace key membrane assembly and check operation.
RESULT
Continuity
CAUSE
Defective PCB assembly. Loose connection. Defective key membrane assembly. Defective PCB assembly.
REMEDY
Replace PCB assembly. Connect them tightly. Replace key membrane assembly. Replace PCB assembly.
No continuity
2. Some inputs cannot be programmed. 3. Display shows a number or figure different from one touched.
Everything works as specified.
Still have trouble.
4. Random programming when touching other pads. 5. Display is fixed at some figure and can not accept any input.
5-13
(TROUBLE 2) Oven does not operate at all, display window does not display any figures, and no input is accepted.
CONDITION
1. Fuse blows.
CHECK
Check continuity of monitor switch (with door closed). Replace fuse Check continuity of primary switch (with door opened).
RESULT
Continuity.
CAUSE
Malfunction of the monitor switch.
REMEDY
Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly.
No continuity.
Continuity.
Shorted contact at the primary switch.
No continuity.
Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly. Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly. Replace high voltage capacitor. Replace high voltage transformer.
Check continuity of secondary switch (with door opened).
Continuity.
Malfunction of secondary switch.
No continuity.
Disconnect one side of the wire lead connected from transformer to the high voltage capacitor and operate the unit.
Normal.
Defective high voltage capacitor. Defective high voltage transformer.
Fuse blows again
NOTE : All these switches must be replaced at the same time. Refer to page 5-7, 5-8
2. Fuse does not blow.
Check continuity of thermostat.
No continuity.
Defective thermostat.
Replace thermostat.
Continuity.
Check continuity of power supply cord.
No continuity.
Defective power supply cord.
Replace power supply cord.
5-14
(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
1. Setting time does not count down when touching START pad.
CHECK
Check continuity of secondary switch (with door closed).
RESULT
No continuity.
CAUSE
Defective secondary switch.
REMEDY
Replace secondary switch.
Continuity.
Check the connection between CN1 connector and PCB assembly. 2. Fan motor or oven lamp do not turn on. Check fan motor. Check oven lamp.
Continuity
Defective PCB assembly. Loose connection.
Replace PCB assembly. Connect them tightly. Replace fan motor. Replace oven lamp.
No continuity
Abnormal Abnormal Normal
Defective fan motor. Defective oven lamp.
(TROUBLE 4) Oven seems to be operating but little heat is produced in oven load. CONDITION
Output is low
CHECK
Check the power source voltage.
RESULT
Lower than 90% of rating voltage. Normal
CAUSE
Decrease in power source voltage with load.
REMEDY
Suggest customer contact local electric power utility company or qualified electrician. Replace PCB assembly.
Disconnect the wire leads from relay 2 and check on and off time with multitester.
Abnormal
Defective PCB assembly.
Normal
Measure the output power.
Abnormal
Defective magnetron.
Replace magnetron.
NOTE : Simple test of power output-conducted by heating one liter water for one min. if available. Minimum 8.5°C temperature rise is normal condition. 5-15
(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run. (Display operates properly) CONDITION
No microwave oscillation.
CHECK
Disconnect the wire leads from relay 2 and check continuity of relay 2. (Operate the unit)
RESULT
No continuity.
CAUSE
Defective PCB assembly.
REMEDY
Replace PCB assembly.
Continuity.
Check high voltage transformer
Abnormal
Defective high voltage transformer.
Replace high voltage transformer.
Normal
Check high voltage capacitor.
Abnormal
Defective high voltage capacitor.
Replace high voltage capacitor.
Normal
Check high voltage diode.
Abnormal
Defective high voltage diode.
Replace high voltage diode.
Normal
Check magnetron.
Abnormal
Defective magnetron.
Replace magnetron.
NOTE : · Make sure the wire leads are in the correct position. · When removing the wire leads from the parts, be sure to grasp the connector, not the wires. · When removing the magnetron, be sure to install the magnetron gasket in the correct position and in good condition.
Output is full power when you set lower power level.
Disconnect the wire leads from relay 2 and check continuity relay 2. (Operate the unit)
Abnormal.
Defective PCB assembly.
Replace PCB assembly.
5-16
EXPLODED VIEW
INTRODUCTION
OVEN CAVITY PART INTERIOR PARTS DOOR PARTS BASE PLATE PARTS LATCH BOARD PARTS CONTROL PANEL PARTS
6-1
DOOR PARTS
13581A
15006A 13536A 13552A
13213A
14890A
13720D
14026A
14970A
6-2
CONTROLLER PARTS
24781M
23572A 268711 WTT028 23506A
24510L
24970A
250201
6-3
OVEN CAVITY PARTS
33112U WTT021
33550H
33052M 340511
WNZ015
WTT010
35300S 35026G
33390G 36549S 35889A
WSZ184
WTP013
6-4
LATCH BOARD PARTS
43501A WSZ085
466001
43500A
466003
466001
6-5
INTERIOR PARTS
WSZ002 568771 56411A
50FZZA 56930V 55006F WTT028 54974S 56549F
WSZ002 55900A
WTT037
WSZ002 34930W
WSZ002 WSZ002 35012A WSZ002 50CZZH 56851D
948501 56324A 56912B WSZ002 55262A 54810C WTT028
6-6
BASE PLATE PARTS
63303L
56170D
63302L
948502 647781
WTT028 63302R WSZ002 63303R
WTT021
6-7
AC INPUT
U01
1K
FUSE
R50
Q50
R51
270
R21 D20 R20
34 Vbz 32 AVcc 33 Vcc
R04 1K Q02
A1266
22K 1K 1K
R22
D0 INT0
D3
37
C107
BZ1
P/NO:6908W3YA01A GPB-B-26B2.1ES
AMS-114YF/114YFA
P/NO:6302W5A015A
1N4148
Q20
1
2
3
4
5
6
7
SCHEMATIC DIAGRAM OF P.C.B.
P/NO:6630W5V021A YW396-08AV(2.4.6V)
P/NO:6010W2P037 120/60 144mA/12V
C107
C20
223P 223P
C21
D7 D8 D9 D10 D11 D12 D13 R80 R81 R82 49 50 52 53 54 55 57 58 59 60 61 64 Vdisp 14 OSC1 R54 1.0K R55 1.0M R90 R91 R92 R93 R11 R12 R13 R20 R21 J54 R22 R23 15 OSC2 P/NO:6212W5M002A CSTS0400MG'
R42 26
HNM-07SS30
Auto Auto Defrost Reheat
Light Menus
Auto Cook
N.C
N.C
Quick Defrost
CN3
DP1
CN1
1
PT1
D01
1N4002 C01
104P
-5V
R03 C06 1K 104P
8
C02 220 /25
C03 220 /25
ZD1
5.1V
13 RESET
D02
1N4002
OVEN THERMOSTAT
R01 1.5K
223P
R02 4.7K C05 Q01
A1266
C04 4.7 /50
VR1
Vry C10
223P
D03 1N4002
Vbz C11
47/50
-5V
12 TEST 16 GND 19 AVss 17 X1 18 X2
41 42 43 44 45 46 47 48
29 28 27 26 25 24 23 20 21 22 14 13 12 11 10 9 8 7 6 62 63 AR1,2 P/NO:0RR4702D610 47K*7 1/10W Vdisp 5 4
a b c d e f g k j h n p r bar G7 G6 G5 G4 G3 G2 G1
Start/
Micro
N.C
N.C
Clock
Option Cancel Q_Start
9
Feijao Mandioca
Arroz Pipoca
Hold Warm
Power
30 Add
10
1
2
3
4
5
6
7
11
8
9
0
N.C
N.C
N.C
N.C
12
P/NO:CQ33026A INR14D271
D10 R10
20
R01
1N4002
1.5K
13
R02
R11
10
1.5K
ZD2 F2
7.5V
AMB-314XF/314XFA
R12
10
1
2
3
4
5
6
7
3
F1
100K
R13
-5V
Auto Auto Defrost Reheat
Light Menus
Auto Cook
Auto Grill
Auto Quick Crisp Defrost
CN3
8
O/L
PRIMARY SWITCH
RY1 MAIN RELAY D30 1N4148 Q30 C3202 Vry
CR1
Micro
F1 P1,2 F2 P31,32
Grill Combi
Clock
Option Cancel Q_Start
Start/
9
36 R30 10K R31 2.7K D2
Feijao Mandioca
R41 R40 R03 R02 R01 25 24 11 10 9
Arroz Pipoca
Hold Warm
Power
30 Add
F/M
5
P/NO:6920W2D010A OJ-SS-112LM OR P/NO:6920W2D010B CS11-12SH OR P/NO:6920W5A007A ALD112 OR P/NO:6920W5A008A DQ1U
D31 1N4148 A
10
1
2
3
4
5
6
7
11
8
9
0
N.C
N.C
N.C
N.C
12
D1
13
RY2
MONITOR S/W
R90
R91
R92
R93
R94
R95
R96
R02
1.5K
POWER
D32 1N4148
AR3
P/NO:6920W5A012A G5G-1A-DT1-LG(1mS)
1
2
3
4
5
6
7
R60
1
C80
R80
Auto Auto Defrost Reheat
8
221P
Light Brazilian Auto Cook Menus Grill
Auto Crisp
CN3
N.C
AMS-116YF/116YFA
RY3 D33 1N4148
P/NO:6920W2YD04A OZF-S-112LM1P
Manual
N.C
N.C
N.C
Option Cancel Q_Start
Start/
39 R61 2
R81
P/NO:6630W5YA19D FCZ254-12D OR P/NO:6630W5V039G YCH200 13PIN
1
2
3
4
5
6
7
Auto Auto Defrost Reheat
Light Brazilian N.C Cook Menus
N.C
Quick Defrost
CN3
8
Micro
GRILL
T.T.M
Q33 C105 A
D5
C81
221P
9
N.C
N.C
Clock
Option Cancel Q_Start
Start/
9
N.C
R62 3
C84
221P
N.C
R84
N.C
10
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
1
N.C
R63 4
C82
221P
10
1
N.C
R82
N.C
11
N.C
N.C
N.C
N.C
ENCODER
3
N.C
N.C
N.C
N.C
N.C
N.C
N.C
3
2 4
N.C
R70 5
R83
12
11
2 4
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
N.C
7
P/NO:6024WRYA06B ES1005A,SEIL
12
R01
DOOR SWITCH
8
D35 1N4148 D25 1N4148
R25 3.9K
-5V
R70 R72 R74
1.5K
-5V D6 40
13
R01
1.5K
13
R02
R26 1.0K C25 223P
Q80
28 R50 Vry
C107
NOTE
R02
1.5K
1.5K
1. The unit of ELECTROLYTIC CAPACITOR is [uF]/[V].
AMB-316XF/316XFA
ex) 220/25V = 220[uF]/25[V].
2. The unit of CERAMIC CAPACITOR is [pF].
R51 29 R52 30
ex) 223P = 22*10 [pF].
OPTION CIRCUIT
0IZZW5A106A/124A MODEL OPTION
MODEL §~¡
1.1/1000W
KEYPAD SOLO
3
3. The unit of RESISTOR is ohm, and K=1000, M=K*K.
R53 31
1.1/1000W
KEYPAD GRILL
4. The transistor in the hidden circle line is transistor
1.1/1000W
DIAL SOLO
1.1/1000W
DIAL GRILL
1.1/1150W
KEYPAD SOLO
1.1/1150W
KEYPAD GRILL
1.1/1150W
DIAL SOLO
1.1/1150W
DIAL GRILL
R71
0IZZW5A124A ,, ¡" OPTION
R73
R70 R71 X 47K 47K 10K 33K 12K 22K 12K 12K 10K 10K 12K 12K 22K 12K 33K 10K 47K 47K
,"-- 1 2 3 4
R75
with built-in bias resistor.
X
Country -- ¡¿>
,£ ..."
~¥·,, 220/50 ¿^ 220/50 ¿^
· 220/60 ,,l
~",¶ 120/60 ,,l
HD404339'S
0IZZW5A106A(
§~¡
R72 R73 0^° X 47K
-5V
) POPCORN OPTION
5^°+ 47K 10K 10^°+ 33K 12K 15^°+ 22K 12K 20^°+ 12K 10K 5^°10K 12K 10^°12K 22K 15^°12K 33K 20^°10K 47K 25^°0IZZW5A124A(B65S) Relay fixcrossing Option
R74 R75 X 47K 47K 10K 33K 12K 22K 12K
47K
,"--
1
2
3
4
5
6
7
8
X
-- ^ ·´
120/60 1000W
120/50 1000W
220/60 1000W
220/50 1000W
120/60 1150W
120/50 1150W
220/60 1150W
220/50 1150W
0IZZW5A106A `/
OPTION
,
¤"
KEY OPTION
MAGNETRON
§~¡
R74 R75
R72
X
47K
33K
22K
12K
10K
12K
12K
120V
X 47K
220V
47K X
MODEL
§~¡ AR3
DIAL KEYPAD 47K 150K
R80
5.6K 22K
R81
5.6K 22K
R82
1K 22K
R83
X 22K
R84
1K 22K
R90~R96
5.6K 22K
R73
47K
10K
12K
12K
10K
12K
22K
33K
8-1
ST/M
Q31 C105
35
R00
8
R01
1.5K
PRINTED CIRCUIT BOARD
8-2
P/NO : 3828W5S3017
March, 2003 Printed in Korea