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LIGHT OVEN “SolarDOM” SERVICE MANUAL
Contents
1. 1 SETTING THE CLOCK Co 1 Grill 1 Microwave Power Co 2 Grill 2 Microwave Power Turn Dial Co 3 Grill 3 Microwave Power Stop Clear Clock ds Enter Co 4 Upper Heater 1550W Lower Heater Microwave power Co 5 Upper Heater 1100W Lower Heater Microwave power Turn Dial 3 Pe Enter ex EN Tum Dial minute top Speed Desired Enter Clear Combi Co 1 2 3 4 5 Desired Desired 2 MICROWAVE COOKING gt power gt Enter La cooking Start m Tum Dia level time esire gt Enter Clear power level 7 DEFROST Turn Dial Turn Dial gt Desired Start 0 Defrost Desired defrost Enter 1000 Start cooking time category 9 3 MULTI STAGE COOKING MICROWAVE 8 SPEED COMBI COOK Stage 1 Function Turn Dial atop Speed Desired speed Hm Food gt Start Stop Turn Dial Turn Dial Combi Combi category g cl a le 9 SPEED AUTO COOK Stage 2 z Stop Speed Dial Desired Food ET Beste Clear Auto Speed Auto Cook Enter weight gt gt Start Micro gt power Enter cooking H gt Start Category eve time 10 CHILD LOCK This oven has a CHILD LOCK feature 4 GRILL COOKING To Set CHILD LOCK Turn Dial Stop Stop Clear Clear gt Grill reb gt Enter Stop Clear Touch and Hold Turn Dial To Cancel CHIL
2. MS 998 O end E 2277 god UIEN 22 LN STUY 10 814 Ad 9AH SAH END S v E ino HM HI HM a IN Qu 1no ano 1no 1n9 TIVI NH3HL HM NOH L3NOVIA 28 A EE Id x w oll LNdNI 1412 i O00 OAH ele 8 5 11 No 2 esn4 AH z 12 ADA 2 5 2 d 3SION gt HM HM Q G Jeuuojsuel A H A 8 MS INVHOVIGO OILVINAHOS 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 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 TOUCHING THE START BUTTON 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 4 Turntable
3. 6 5 EV INTERIOR PARTS 1 Se See I SSS I SS I ZT ZT 6 6 EV INTERIOR PARTS Il 6 7
4. Measure the continuity Reverse Ohm meter scale Rx10000 2 5 10 Normal Infinite Abnormal Continuity COMPONENTS TEST PROCEDURE RESULTS FUSE H V FUSE Check for continuity of the fuse with an multi meter Normal Abnormal 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 Replace just the fuse if the switches operate normally HEATER ELEMENT Wire leads removed Measure the resistance Multi meter scale Rx1 Normal Upper sheath heater Approx 47 ohm 230V 1100W Lower sheath heater Approx 74 ohm 230V 700W Upper Halogen heater Approx 15 ohm 230V 450W at 20 30 C Measure the resistance with 500V 100M ohm insulation resistance meter Normal more than 0 5 Mohm NOTE Make sure heater is fully cooled when tested MAGNETRON and OVEN THERMOSTAT 5 11 OVEN Thermostat 0 C 160 C M G T Thermostat 60 C Approx 110 C COMPONENTS TEST PROCEDURE RESULTS Disconnect the 4 pin connector from P C B Refer to schematic diagram Check for P C B connector Cooking Start RELAY OF P C B Wire leads removed Note Relay Relay 1
5. eiii tnnt datnr rte 5 8 COMPONENT TEST PROCEDURE 2 tenent ette there teta ratas 5 9 TROUBLE 400 5 14 EXPLODED VIEW 6 1 REPLACEMENT PARTS LIST rent xir 7 1 SPECIFICATIONS ITEM DESCRIPTION MODEL MP 9485S Power Requirement 230 Volts AC 50 Hz Single phase 3 wire grounded Microwave 1650W Grill Max 1600W Combination Max 2350W Convection 2300W Power Output 900 Watts full microwave power IEC 60705 Microwave Frequency 2450 MHz Magnetron 2M248H B Timer 0 90 Outside Dimensions 527 W x 394 H x 480 D mm Cavity Dimensions 440 W x 204 H x 420 D mm Net Weight 26 kg Shipping weight 29 kg Control Complement 1 Microwave Power level 3 Convection 40 C 100 250 C MAX 900W 600W 360W 180W 90W 4 SPEED COMBI 2 GRILL Display Heater Microwave power selection Category Display Heater operating Co 1 Grill 1 180W 360W 600W Gril gri Upperheater 1550w j 00 Grill 2 180W 360W 600W Grill 2 gr 2 Upper heater 1100W Co 3 Grill 3 180W 360W 600W 03 Upper heater 700W Co 4 Upper heater 1550W Lower heater Microwave power Co 5 Upper heater 1100W Lower heater Mic
6. 5 Gasket Heater Bracket INTERLOCK CONTINUITY TEST TYPE NO SZM V 16 FA 63 FOR PRIMARY SWITCH TYPE NO SZM V 16 FA 62 FOR MONITOR SWITCH TYPE NO SZM V 16 FA 63 FOR SECONDARY SWITCH WARNING FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS A PRIMARY INTERLOCK SWITCH TEST B SECONDARY INTERLOCK SWITCH TEST When the door is closed slowly an audible click should be heard at the same time or successively at intervals When the door is opened 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 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 terminal of the switch The meter should indicate C MONITOR SWITCH TEST an open circuit in the door open condition When the door is closed the meter shoul
7. Microwave power output measurement is made with the oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of 1000 5 g 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 190 mm The oven and the empty vessel are at ambient temperature prior to the start of the test The initial temperature 1 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 shelf 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 AT of 10 2 K is measured where T is the time in seconds and AT 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 The microwave power output P in watts is calculated from the following formula 4187 X AT 0 55 X T2 To XM 2 Temperature after heating To Temperature of bowl M Weight of bowl is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included The water is stirred to equalize temperature throughout the vessel prior to me
8. OVEN COMPONENTS TEST PROCEDURE RESULTS HIGH VOLTAGE TRANSFORMER Wire leads removed FILAMENT WINDING TERMINAL SECONDARY TERMINAL PRIMARY TERMINAL 1 Measure the resistance Ohm meter scale Rx1 and Rx100 Primary winding Approx 1 7 ohm Secondary winding Approx 130 ohm Filament winding Less than 1 ohm 2 Measure the resistance Ohm meter scale Rx1000 Primary winding to ground Normal Infinite Filament winding to ground Normal Infinite MAGNETRON Wire leads removed 1 Measure the resistance Ohm meter scale Rx1 Normal Less than 1 ohm Filament terminal 2 Measure the resistance Ohm meter scale Rx1000 Normal Infinite Filament to chassis 5 9 COMPONENTS TEST PROCEDURE RESULTS 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 NOTE Some inexpensive meters may indicate infinite resistance in both direction Measure the continuity Forward Ohm meter scale Rx10000 Normal Continuity Abnormal Infinite
9. 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 CAUTION MICROWAVE RADIATION DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY CONTENTS Page SAFETY PRECAUTIONS Leere Inside front cover SBE CIFIC A TIONG nankucagncebacaganabaceqacadawagiendacuynandinngaauaceaytestaenbaanbenoas 1 1 CAUTIONS ainia anda dada 20642443 2 1 INSTALLATIONS nda A 3 1 OPERATING INSTRUCTIONS ai 4 1 FEATURES ar gt 4 1 CONTROL 4 1 OPERATING SEQUENCE dete en ent t dnte ntta rata the tnt ink abd 4 2 SCHEMATIC DIAGRAM gt 4 3 CIRCUIT DESCRIPTION 4 4 SERVICE INFORMATION ken 5 1 TOOLS AND MEASURING INSTRUMENTS lt 0siocorniccanacnnenorianccrnaccarnio caricias crean 5 1 MICROWAVE LEAKAGE TEST tnter kid tare genre raa 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT m mnn nennen 5 3 DISASSEMBLY AND ADJUSTMENT cient 5 3 UPPER amp LOWER HEATER eher teen pntat than 5 7 INTERLOCK CONTINUITY TEST
10. oven lamp and fan motor run Display operates properly CONDITION CHECK RESULT CAUSE REMEDY No microwave Disconnectth No continuity Defective P C B Replace P C B oscillation assembly assembly wire leads from relay 4 and check continuity Continuity of relay 4 Operate the unit Check H V Defective high Replace high Di A gt transformer and voltage voltage H V Fuse transformer and transformer and H V Fuse H V Fuse normal Check H V em Defective high Replace high capacitor voltage capacitor voltage capacitor normal Check H V Defective high Replace high diode voltage Diode voltage Diode normal Check Abnormal Defective Replace Magnetron magnetron magnetron 5 18 TROUBLE 6 Oven does not cook properly when programmed for the set power level Operates properly on HIGH CONDITION CHECK RESULT CAUSE REMEDY Output is full when Disconnect the Defective P C B Replace P C B you set lower wire leads from assembly assembly power level relay 4 and check continuity relay 4 Operate the unit TROUBLE 7 Heater Relay 5 Up sheath Heater Relay 6 Lo sheath Heater Relay 7 Halogen H
11. rotates PRIMARY FUSE SWITCH 4 HV MONITOR TRANS SWITCH FORMER 1 SECONDARY PELA PF SWITCH 1 MICOM CONTROLLER YN The fan motor rotates and cools the magnetron by blowing the air coming from the intake on the back cover 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 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 4000 Volts DC is applied to the filament of the magnetron WHEN THE OVEN IS SET AT ANY LEVEL EXCEPT MAXIMUM The micom controller controls the ON OFF time of relay 4 by the applied signal to vary the average output 4 4 power of oven as POWER LEVEL refer to page 1 1 One complete cycle of relay 4 is 32 seconds WHEN THE DOOR IS OPENED DURING COOKING Both the primary switch and relay 4 are cut off primary winding voltage of the high voltage transformer ON OFF of relay 4 is coupled electrically with opening and closing of the secondary switch When the doo
12. side of the wire voltage capacitor voltage capacitor lead connected from transformer Fuse blows again Defective high volt Replace high volt to the high age transformer age transformer voltage capacitor and operate the unit NOTE All these switches must be replaced at the same time Refer to page 5 6 5 8 2 Fuse does not blow 5 16 Check continuity 222 Defective mag Replace mag of magnetron No continuity gt netron thermostat gt netron thermostat thermostat oven thermostat oven thermostat ee and Lower voltage and Lower voltage Continuity transformer transformer gt a m No continuity gt Defective power gt Replace power cord supply cord supply cord TROUBLE 3 Display shows all figures set but oven does not start cooking while desired program times are set and START button is touched CONDITION CHECK RESULT CAUSE REMEDY 1 Setting time does Check continuity ium Defective Replace when touching switch with and secondary and secondary START button door closed gem Switch wire Switch wire Continuity connector connector Check the con Defective P C B Replace P C B gt nection between No assembly assembly gt connector and P C B assembly j Continuity Loose connection
13. D LOCK Aet Start cooking time Stop Clear Grill Categories Stop Clear Touch and Hold Grill 1 Upper Heater 1550W Grill 2 Upper Heater 1100W 11 QUICK START Grill 3 Lower Heater 700W Stop Clear gt Start Quick Start 5 CONVECTION COOKING To cook Turn Dial Sich gt Convection gt Desired convection temp 40 C 100 C 250 C Desired Enter gt cooking gt Start time 4 2 SCHEMATIC DIAGRAM NOyLINOVIA 133121554309 38N1V43dMW31 3ALLISOd O Ld YOLOW 3lH3SSILOH W H HOLON HOLIMS MS HOLON 318V L NYAL ALL 3dlHlS MOTIAA ANY N33H9 9 9 dAVIN3AO YOLOW ALIHM HM qau ad NMOH amp NS8 MOVI8 5IH 31818 N3dO SI 311ON sisseuo oj Joyoedeo an ye au Aq ONIOIAH3S 3HOJ38 ADVLIOA LAVH 13 H3193NNOO3G 3TOINHO3 NOLLNSAYSLNI 1 essejy usnaquean nag JOA J0jesuepuoxsBunuuedsuooH ONNLHOV
14. Fan motor Circulation motor Relay 2 Oven lamp Turntable motor Rotisserie motor Relay 3 P T C Relay Positive Temperature Coefficient Relay 4 Microwave Relay 5 Up sheath heater Relay 6 Lo sheath heater Relay 7 Halogen Heater Relay 1 2 3 4 5 6 7 Cooking Start FAN MOTOR Wire leads removed Measure the resistance Ohm meter scale R x 1 Normal Approx 60 ohm Abnormal Infinite or several ohm TURNTABLE MOTOR Wire leads removed Measure the resistance Ohm meter scale R x 1000 5 12 Normal Approx 10 20 kohm Abnormal Infinite or several ohm COMPONENTS TEST PROCEDURE RESULTS CIRCULATION MOTOR Measure the resistance Normal Approx 170 ohm Wire leads removed Multi meter scale R x 1 Abnormal Infinite or several ohm KEY PCB Check continuity between switch terminals by pressing an appropriate pad on key board The contacts assignment of the respective pads on the key board is as shown left figures NOTE A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON MAKE SURE THE WIRE LEADS ARE CORRECT POSITION WHEN REMOVING THE WIRE LEAD FROM THE PARTS BE SURE TO GRASP THE CONNECTOR NOT THE WIRES 5 13 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
15. OF THE 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 circuitry on the digital programmer circuit since static electric discharge may damage this control panel Always touch yourself ground while working on this panel to discharge any static charge built up in your body CONDITION CAUSE REMEDY The oven gt Inserting many plug into one gt Avoid using other electrical does not work plug outlet and using appliances when you use them at the same time the oven causes overloading a The overi m Insert the oven plug securely Output power is too low gt Low AC input voltage Use the oven at adequate line voltage Food temperature is too low This may not be a defect It is possible that the food should be cooked for a longer time period Sparks occurring Us
16. Replace PCB programmed ection between assembly assembly key assembly and PCB Loose Connect them assembly No continuity connection tightly 2 Some inputs Everything works 1 Replace key as specified r Defective key Replace key assembly and assembly assembly programmed check operation 3 Display showsa Defective PCB Replace PCB number or figire Still have trouble gt assembly assembly different from one touched gt Random programming when touching other pads al Display is fixed at some figure and can not accept any input 5 15 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 Check continuit T Malfunction of the Replace primar 1 Fuse blows Neck continuity Continuity 8 y of monitor monitor switch and monitor switch with switches door closed L No continuity 34 Replace fuse Check continuity __ Continuity L Shorted contact at gt gt BAN p of primary and monitor switch with NIE primary siten switches door opened No continuity Disconnect one gt Normal Defective high Replace high L
17. VAL 1 Disconnect the power cord 2 Open the door from oven insert JIG into the choke cover hole of door 3 Lift the door from front 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 with a survey meter Microwave energy 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 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 Please use the JIG P No 383EW5A224A below for door removal DOOR JIG P No 383EW5A224A F BRACKET ASSEMBLY REMOVAL 1 Remove screws on the bracket assembly and release a lug 2 Disconnect the leadwire from thermostat and lift out the bracket assembly G MAGNETRON REMOVAL 1 Remove controller assembly and bracket assembly 2 Disconnect the leadwire from the high voltage transformer and Magnetron 3 Carefully remove the mounting screws holding the magnetron and the wave guide 4 Remove the magnetron until its dome is clear from the wave guide NOTE 1 When removing the magnetron make sure its dome does n
18. Website http biz Igservice com LG LIGHT OVEN SolarDOM MODEL MP 9485S CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL June 2005 P NO 3828W5S6187 Printed in Korea 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
19. an select five power level settings 5 Speed Auto Cook Speed auto cook allows you to cook most of 11 Stop Clear You can stop over and clear all entries except time of your favorite food quickly by selecting the food type and the weight day of the food 12 Start Quick Start 6 Dial Knob In order to start cooking which is selected press button one time You can set cooking times temperature weight and cooking The quick start feature allows you to set 30 seconds intervals of HIGH categories power cooking with a touch of the quick start button While cooking with auto and manual function you can lengthen or shorten the cooking time at any point by turning the dial knob except defrost mode 7 Display Window You can show time of day cooking time power level and cooking categories OPERATING SEQUENCE The following is a description of component functions during oven operation 6 SPEED COMBI COOKING Speed combi Categories
20. asuring the final water temperature e Stirring devices and measuring instruments are selected in order to minimize addition or removal of heat P WATER LOAD p NS TURNTABLE DISASSEMBLY AND ADJUSTMENT A OUTER CASE REMOVAL 1 Disconnect the power supply cord from the outlet 2 Remove the screws from the rear and along side edges of the case The outer case must be moved backward to be lifted off B POWER SUPPLY CORD 1 Remove the outer case 2 Disconnect two terminals and remove one screw of the earth terminal CAUTION DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING refer to page 2 1 C CONTROL PANEL ASSEMBLY 1 Disconnect the leadwire from the PCB sub assembly 2 Remove the screws for the control bracket and securing the control panel 3 Remove control panel assembly from the oven by the moving control panel assembly right side 9 gt 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 PCB holder 3 Remove the PCB holder amp PCB bracket 4 Remove screws which hold the control panel 5 Disconnect the flat cable from the PCB sub assembly and take off the PCB sub assembly PCB Bracket PCB Sub Main PCB Holder PCB Sub Tact S W Control Panel E DOOR GROSS ASSEMBLY REMO
21. d 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 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 Check for continuity of the switch Wire leads removed with a Multi meter Door Door open close Primary Switch Monitor Switch Secondary Switch correctly connected 5 8 NOTE After checking for the continuity of switches make sure that are 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
22. danger resulting from the microwave leakage 2 MOUNTING OF THE PRIMARY MONITOR SECONDARY SWITCHES TO THE LATCH BOARD ADJUSTMENT DIRECTION MONITOR SWITCH PRIMARY SWITCH SECONDARY SWITCH 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 M UPPER SHEATH HEATER REMOVAL 1 Remove two hex nuts holding the sheath heater 2 Remove the sheath heater from the oven cavity N UPPER HALOGEN HEATER REMOVAL f there are broken glass pieces between the reflector and the oven cavity 1 Remove the magnetron air tunnel and fan motor assembly 2 Remove the latch boards and air tunnel L R 3 Remove two screws holding the insulator U to the back plate and lift it up 4 Remove the heater holder 5 Remove the reflector and glass pieces f the hologen heater isn t broken 1 Remove the heater holder and halogen heater Chamber U Upper Sheath Heater Insulator U 5 7 LOWER HEATER REMOVAL 1 Disconnect the leadwire from the sheath heater Remove the base plate from cavity Remove the nuts from the oven cavity of the side Remove the gasket ring and heater bracket Remove the sheath heater in the oven cavity 2 3 4
23. eakage 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 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 possibly cause probe damage 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 OF MICROWAVE POWER OUTPUT
24. eater CONDITION CHECK RESULT CAUSE REMEDY 1 Heater is not Heater Abnormal Malfunction of the Replace operating heater Normal Thermostat and Malfunction of the lace relay 5 6 7 enorme thermostat and 5 6 7 Normal Wire connection gt No continuity Open or loosen gt connect tightly 2 Lower tempera Heater Abnormal Malfunction of the Replace ture the oven heater Normal Thermostat and Malfunction of the gt relay 5 6 7 Annona thermostat and Repase relay 5 6 7 NOTE Make sure the wire leads correct position When removing the wire leads from 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 5 19 EV EXPLODED VIEW INTRODUCTION INTERIOR PARTS OVEN CAVITY PARTS BASE PLATE PARTS CONTROL PANEL PARTS LATCH BOARD PARTS DOOR PARTS 6 1 DOOR PARTS EV CONTROL PANEL PARTS 6 3 OVEN CAVITY PARTS EV SS SS SS As EV LATCH BOARD PARTS
25. er approx 190mm height approx 90mm Glass thermometer 100 C or 212 F 1 deg scale 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 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 Less than 2 5 cm sec 1in sec 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 WARNING 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 l
26. g enough to hold the oven and the food and utensils you put in it Use care when handling 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 that the microwave oven legs are in place to ensure proper air flow The oven should not be installed in any area where heat and steam are generated because they may EARTHING INSTRUCTIONS This oven is designed to be used in a fully earthed condition It is imperative therefore to make sure it is properly earthed before servicing WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this mains lead are colored in accordance with the following code damage the electronic or mechanical parts of the Green and yellow Earth unit Blue Neutral Do not install the oven next to a conventional Brown Live surface unit or above a conventional wall oven Use the oven in an ambient temperature less than 104 F 40 C Place the oven on a sturdy and flat surface at least 10 cm 4 inches from the wall Place the oven as far away as possible from TV RADIO COMPUTER etc to prevent interference Do not touch the front glass during or after cooking of the Grill and convection and Combination mode This glass is very hot during heater operating Do not operate the oven at microwave and combination mode with Grill rack placed in the cavity when
27. he 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 assembly 7 After repairing the motor rotate the removed turntable motor cover 8 Fit the turntable motor cover s projecting part to the base plate slit and fasten a screw 2 3 4 NOTE 1 Remove the wire lead from the turntable motor VERY CAREFULLY 2 Be sure to grasp the connector not the wires when removing Turntable Motor K C MOTOR THERMISTOR REMOVAL 1 Remove controller assembly 2 Disconnect the leadwire from the circulation motor terminal and oven thermostat 3 Remove three screws of the air tunnel U and lift it up 4 Remove the screws of the thermistor guide assy chamber and lift up the guide assy chamber 5 Remove a hex nut securing the circulation fan to shaft of the C motor 6 Remove screws securing the motor shaft to the guide assy chamber 7 Remove hex nut securing the C motor to the motor shaft Circulation Motor Oven Thermostat Air Tunnel U 5 6 L 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
28. ing metallic ware and Do not use metallic ware for allowing it to touch the oven cooking except where noted wall in the cooking guide Ceramic ware trimmed in Do not use any type of gold or silver powder is used cookware with metallic trimming Uneven cooking Inconsistent intensity of gt 1 Wrap the thinner part with microwave by their aluminum foil characteristics 2 Use plastic wrap or lid 3 Stir once or twice while cooking soup cocoa or milk etc 5 14 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 does not count down with time blinking or up with clock operation 6 Display obviously jumps in time while counting down 7 Display counts down too fast while cooking 8 Each indicator light does not turn on after setting cooking cycle 9 Display time of day does not reappear when cooking is finished 10 Beep sound is not heard when correct key is touched CONDITION CHECK RESULT CAUSE REMEDY 1 No input can be Check the conn Continuity Defective PCB
29. jure 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 2 1 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 MAGNETRON THE OVEN IS TO BE SERVICED ONLY BY PROPERLY QUALIFIED SERVICE PERSONNEL INSTALLATIONS BEFORE YOU BEGIN READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY INSTALLING 1 Empty the 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 Put the oven on a counter table or shelf that is stron
30. ot 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 cm 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 Bracket gt SZ 2 SZ Ss VIE H FAN MOTOR ASSEMBLY REMOVAL 1 Remove controller assembly bracket assembly power cord latch board R from upper 2 Disconnect the leadwire from fan motor latch board R and noise filter 3 Remove the three screws holding the fan motor assembly to the oven cavity 4 Remove the fan motor assembly to the upper plate 1 HIGH VOLTAGE CAPACITOR FUSE TRANSFORMER AND DIODE REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from transformer magnetron Fuse and capacitor 3 Remove the screw holding the transformer and remove the high voltage diode earth screw Bracket 5 5 J REMOVING THE TURNTABLE MOTOR 1 Remove the metal tray Remove the turntable shaft VERY CAREFULLY Lay the unit down on its back Remove t
31. r 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 4 and or secondary switch fails to open the fuse opens due to the large current surge caused by the monitor switch activation which in turn stops PRIMARY FUSE SWITCH 4 HV MONITOR TRANS SWITCH FORMER gt D 2 Ses SECONDARY PEE 9 9 SWITCH CONTROLLER 00 magnetron oscillation WHEN TOUCHING THE START BUTTON WITH THE HEATER COOKING FUNCTION SELECTED The contacts of the primary switch and the secondary switch close the circuit A C voltage is applied to the heater through thermostat as shown by the solid line E HEATER RELAY 56 7 THERMOSTAT Turntable rotates The fan motor rotates The air is also directed into the oven to exhaust the vapor in the oven through the base plate and back plate 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
32. rowave power 5 SPEED AUTO COOK 5 1 SC2 W SC3 f SCH amp Mrozona pizza 58 5 69 Stek wotowy 5 9 Danie mrozone Frytki SC6 GB Piecze wieprzowa SC10 wie e warzywa Kurczak w ca o ci SC7 Piecze wotowa SC11 59 Mrozone warzywa Kawa ki kurczaka SCE CH Ziemniaki w mundurkach SC12 e f Ryz Makaron Rating Label Location Front Plate Accessories Owner s manual amp Cook book High rack Low rack Metal tray This oven is designed for household use only It is not recommended for commercial purposes 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 i Remove your watches whenever working close to or replacing the Magnetron NEVER operate the oven with no load NEVER in
33. tape Polishing cloth 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 cm 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 oven should not exceed 4 mW cm Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage 5 1 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 31 2 in Cylindrical and made of borosilicate glass vessel max thickness 3 mm outside diamet
34. te then 2 Fan motor Check 1 t c motor or ES STAN MOLON P Defective fan Replace fan c motor Abnormal j oven lamp motor c motor motor c motor turntable motor gt Check oven lamp Abnormal Defective oven Replace oven rotisserie turntable motor lamp turntable lamp turntable motor do not motor motor turn on Normal TROUBLE 4 Oven seems to be operation but little heat is produced in oven load CONDITION CHECK RESULT CAUSE REMEDY Output is low Check the Lower than 90 of Decrease inpower Suggest customer power source rating voltage source voltage contact local voltage with load electric power L Normal utility qualified electrician Disconnect the wire leads from Abnormal Defective P C B Replace P C B 5 relay 4 and check assembly assembly on and off time with multitester gt Normal Measure the Abnormal Defective Replace output power magnetron 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 17 TROUBLE 5 No microwave oscillation even though
35. the oven is empty 10cm 3 1 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 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 OPERATING INSTRUCTIONS FEATURES Oven Front Plate Control Panel Deco Window Door Screen Control Panel Door Frame Choke Cover Safety Door Lock System HIGH Rack LOW Rack Metal Tray CONTROL PANEL Start P Sto Zegar Termoobieg Grill Kombi 3 Any Szybki Start 1 2 3 4 5 6 78 9 10 11 12 1 Clock You can set the time of day 8 Enter You can determine the selected cooking category 2 Convection You can select temperature and time of convection microwave power level or temperature 3 Grill You can select the grill categories 9 Defrost You can select the food type and the weight of the food 4 Speed Combi You can select the combination categories 10 Micro You c
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