Service Manual - Appliance Factory Parts
Contents
1. 167ms sv 1 amp i cat FUSE R22 MIS Ns tae BET P NO 6302W5A002A 7 MT 213GN 3 96mm PT1 x are aT ha J n 2 1 001 im am eR T 9 cosh goa pst 2 2 MAGNETRON 0 aro isk 201 k Y REED por 2 THERMOSTAT m emm TIT mide wil ml 1 ij i S ze 31 Test ME T 25 I av 1 J ze 22 m 2 EE E EE sav sv en 1 i v en Le 2 M 25 ag k um Lm pem L zoz m ES xin en h2 LP EA r prs 14 bar eorowzroosd D13 Fi is n S010W2POO8A bes E mp 266 Le 65 er 5 EUM zs poeme E Yin 5 a 1 paa 2 a2 NN 1 ru 2 ale oven f bso pz oss ps4 oss 096 1 THEBIS IA Tea Finesse oa Tinara rares 5 oh a LS2. CONDITION CHECK RESULT CAUSE REMEDY Check continuity er Malfunction of the Replace fuse 1 Fuse blows Continuity nonitorswitch primary monitor secondary switch with switches and door closed y No continuity RELAY RY3 of P C B Assembly Replace fuse m Replace fuse continuity Continuity Shorted contact at gt primary monitor of primary i secondary switch with the primary Switch switches and door opened ee RELAY RY3 ani of P C B Assembly Check continuity Continuity gt Malfunction of Esa bom of secondary primary secondary switch secondary switch with switches and door opened No continuity RELAY RY3 of P C B Assembly Disconnect one Defective high volt Replace high volt side of the wire al 9 age transformer age transformer lead connected from transformer to the high voltage Normal capacitor and operate the unit Measure to Normal gt Set is good condition resistance high defective fuse only voltage capacitor refer to page 5 9 UE Abnomal Defective high Replace high voltage capacitor voltage capacitor NOTE All these switches must be replaced at the same time Refer to page 5 7 5 8 2 Fuse does not T Check cont
3. CONDITION CHECK RESULT CAUSE REMEDY Lower than 90 of Decrease in power Suggest customer Output is lo gt cdd Shee ie rating voltage source voltage contact local 2 2 with load electric power L Normal utility co or qualified electrician N Disconnect the w Abnormal Defective PCB Replace PCB wire leads from assembly assembly relay 3 and check L Normal on and off time with multitester 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 14 TROUBLE 5 No microwave oscillation even though oven lamp and blower motor run Display operates properly CONDITION CHECK RESULT CAUSE REMEDY No microwave Disconnect the Defective PCB Replace PCB oscillation wire leads from y assembly assembly relay 3 and check continuity of relay 3 Continuity Operate the unit Check high vol Abnormal Defective high Replace high tage transformer voltage voltage transformer transformer Normal Check high vol Abnorm
4. 7 1 PRINTED CIRCUIT BOARD Hera essen nee 7 2 SPECIFICATIONS DESCRIPTION DECS11MA DES11EA UCS11MA US11EA DFS11G DFS11EA UFS11EA Power Requirement 230 Volts AC 50 Hz 240 Volts AC 50 Hz 1 600 Watts 1 700 Watts Single phase 3 wire grounded Power Output 1 100 Watts full microwave power IEC60705 Microwave Frequency 2 450 MHz Magnetron 2M282 Timer 0 60 min Outside Dimensions 213 4 W x 14 4 H x 17718 D Cavity Dimensions 141 4 W x 87 8 H x 163 8 D Net Weight 51 kg Shipping weight 58 kg Control Complement Touch Control System Clock 00 60 Microwave Power for Variable Cooking Power level Full power throughout the cooking time 7096 Med High approx 70 of Full power 5096 Med Low approx 5096 of Full power 20 Low approx 2096 of Full power Nameplate Location Back Side This microwave oven is designed for commercial use only It is not recommended for built in installation 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
5. 4 3 OPERATING INSTRUCTIONS FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL TIME POWER ary ENTRY LEVEL 2X DFS11G Display Some items in display can be seen but will not glow gt cook OZ HEATER Table OFF Pads TIME ENTRY Use to enter heating time without changing preprogrammed number pads Pads 1 0 Use to begin heating with preprogrammed times and power levels or to enter times for Manual Time Entry cooking DIAL Use to enter times for Manual Time Entry cooking POWER Use to select power level Oven can heat at LEVEL full or reduced power If oven power level is set to 0 oven does not heat for programmed time If no power level is selected oven operates at 100 power STOP RESET Use to exit programming mode and stop cooking during cooking cycle START Use to start Manual Time Entry program or restart interrupted cooking cycle Use to advance to next user option Use to save times and power levels when programming pads QTY2x Use to automatically increase the programmed time for double quantities 4 4 Cooking Displays Shows when power is connected to oven Open and close door to clear READY shows when oven control will accept entries Ap
6. adequate line voltage Food temperature is too low gt This may not be a defect It is possible that the food should be cooked for a longer time period Sparks occur Using metallic ware and Do not use metallic ware for allowing it to touch the oven cooking except that noted in wall 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 1 Use plastic wrap or lid microwave by their 2 Stir once or twice while characteristics cooking soup cocoa or milk etc Display CALL SERVICE This may be cause incomplete connect to H V transformer 5 11 TROUBLE 1 The following visual conditions indicate a probable defective control circuit Incomplete segments Segment missing Partial segment missing Digit flickering NOTE Slight flickering is normal Colon does not turn on or blink A distinct change in the brightness of one or more numbers in display One or more digits in the display are not lighting Display indicates a number different from one touched for example key in 5 and 3 appears in the display Specific numbers for example 7 or 9 will not display when key pad is touched
7. OPTION 3 Press number pad that matches desired option OP represents optional program mode first number represents option number and second number represents functions currently selected for option 4 Press STAHT pad to advance to next option See table for options 5 Press number pad 0 1 3 to change option 6 Press START pad to save changes Repeat steps 4 6 to change additional options 7 Press STOP RESET pad or close oven door to exit programming mode Optional Program Indicator Pad Option Number Selected Numbered Pads Display Options Factory Settings in Bold 1 OP 10 3 second beep End of Cycle Beep OP 11 Continuous beep until door is opened OP 12 5 beep bursts until door is opened 2 OP 20 Eliminates beep Speaker Volume OP 21 Sets volume to low OP 22 Sets volume to medium OP 23 Sets volume to high 3 OP 30 Prevents beep when pad is pressed Key Beep OP 31 Allows beep when pad is pressed 4 OP 40 15 seconds after oven door is opened keyboard disabled Keyboard Enable OP 41 30 seconds after oven door is opened keyboard disabled Window OP 42 1 minute after oven door is opened keyboard disabled OP 43 2 minutes after oven door is opened keyboard disabled 5 OP 50 Prevents adding heating time while oven is heating Add Time During OP 51 Allows heating time to be changed while oven is heating when a memory pad Heating is pressed 6 OP 60 Allows oven to resum
8. Display does not count down with time blinking or up with clock operation Display obviously jumps in time while counting down Display counts down too fast while cooking 10 Each indicator light does not turn on after setting cooking cycle O1 O D 11 Display time of day does not reappear when cooking is finished CONDITION CHECK RESULT CAUSE REMEDY 1 No input can be Check the conn Continuily Defective PCB Replace PCB programmed ection between assembly assembly membrane key L C m assembly and y oose onnect them PCB mE MO CODI gt connection tightly 2 Some inputs gt Replace key gt Everything works Defective key gt Replace key cannot be membrane as specified membrane membrane programmed assembly and assembly assembly check operation gt Still have trouble Defective PCB Replace PCB 3 Display shows a i gt assembly gt assembly number or figure different from one touched 4 Random programming when touching other pads 5 Display is fixed at some figure gt and can not accept any input 5 12 TROUBLE 2 Oven does not operate at all Display window does not display any figures and no input is accepted
9. 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 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 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 mag
10. 8 Do not touch the front glass during or after cooking of the Grill and Combination mode This glass is very hot during heater operating 9 Do not operate the oven at microwave and combination mode with Grill rack placed in the cavity when the oven is empty 10cm 3 1 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 WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this mains lead are colored in accordance with the following code Green and yellow Earth Blue Neutral Brown Live 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 OPERATING INSTRUCTIONS FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PAN
11. consecutive heating cycles without interruption 1 Open oven door If door is closed or RESET pad is pressed before finishing programming sequence oven exits programming mode 2 Press pad 7 for approximately 5 seconds After 5 seconds signal sounds 3 Press desired number pad Display shows heating time and preprogrammed number 4 Press number pads to enter desired cooking time For example to heat for 2 minutes 30 seconds 5 Press desired power level pad to change power level If a power level pad is not pressed oven defaults to 100 power For example pressing MEDIUM 50 pad sets oven to 50 power Display shows current power level if other than 100 percent power 6 Press TIME ENTRY pad Display briefly shows STAGE 2 Then cook time and power level for stage show in display Repeat steps 5 6 to create additional stages 7 Press STAHT pad to save new heating time and power level in oven memory 8 Press RESET pad or close oven door to exit programming mode User Options Follow the instructions below to customized the microwave oven s operation End of cycle signal maximum heating time and other options can be changed to meeting your cooking needs 1 Open oven door If door is closed or RESET pad is pressed before finishing programming sequence oven exits programming mode 2 Press and hold pad 2 for approximately 5 seconds After 5 seconds signal sounds Display shows
12. oven then again to clear display f oven door is open and time shows in display close oven door and press STOP RESET pad to clear display Operating Preprogrammed Pads Oven has 10 20 preprogrammed number pads Instructions are written for factory programmed ovens Manual Time Entry Ovens that are reprogrammed can respond differently Manual Time Entry feature allows the operator to enter 2 min 2 min 3 min 3 min 4 min 3 4 5 6 7 8 9 0 5 min than described below time and power levels and heat without changing the 1 Open oven door place food in oven and close oven preprogrammed pads door 1 Open oven door place food in oven and close door If pad is not pressed in 30 seconds open and close Display shows READY oven door again If pad is not pressed in 30 seconds open and close 2 Press desired number pad oven door again Oven operates and time counts down 2 Press TIME ENTRY pad 3 Oven stops heating and oven signal sounds when Display shows 00 00 3 Press number pads to enter desired cooking time For example to heat for 2 minutes 30 seconds press 2 3 and 0 pads 4 Press desired power level pad to change power level heating timing elapses Operating QTY 2X Pads If a power level pad is not pressed oven defaults to 100 power 1 Press ea Pad For example pressing MEDIUM 50 pad sets oven to 50 power 2 Press desired number pad Disp
13. wires when removing 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 bottom plate I BLOWER MOTOR ASSEMBLY REMOVAL 1 Disconnect the leadwire from blower motor 2 Remove the two screws holding the blower motor to the bottom plate J HIGH VOLTAGE CAPACITOR AND DIODE REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from high voltage capacitor 3 Remove the screw holding the high voltage diode earth screw 4 Remove the screw holding the high voltage capacitor bracket f H V C it apacitor 5 lt gt Bottom plate 5 6 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 b oard 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 r
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15. EL Display Some items in display can be seen but will not glow COOK 2 HEATER Table OFF Pads TIME ENTRY Use to enter heating time without changing preprogrammed number pads Pads 1 0 Use to begin heating with preprogrammed times and power levels or to enter times for Manual Time Entry cooking HOLD 0 Use to select power level Oven can heat at DEFROST 20 full or reduced power If oven power level is MEDIUM 50 setto 096 oven does not heat for MED HI 7096 programmed time If no power level is selected oven operates at 10096 power STOP RESET Use to exit programming mode and stop cooking during cooking cycle START Use to start Manual Time Entry program or restart interrupted cooking cycle Use to advance to next user option Use to save times and power levels when programming pads 4 2 3 4 5 6 9 O DES11EA US11EA 4 1 OPERATING INSTRUCTIONS FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL Display Some items in display can be seen but will not glow Pads TIME ENTRY Use to enter heating time without changing preprogrammed number pads Pads 1 0 Use to begin heating with preprogrammed times and power levels or to enter times for Manual Time Entry cooking POWER LEVEL Use to selec
16. MENUMASTER Microwave Oven Service Manual DECS11MA DES11EA DFS11G DFS11EA UCS11MA US11EA UFS11EA 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 ov
17. PCB SUB ASS Y 4 Disconnect the leadwire from connector CN1 of the PCB SUB ASS Y 5 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 5 3 Remove the screw Kg securing screw 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 ASS Y to the control panel 3 Disconnect the flat cable from the PCB SUB ASS Y and take off the PCB SUB ASS Y PCB Sub Asm Control Panel E DOOR MAIN ASSEMBLY REMOVAL 1 Open the door 2 Remove the choke cover cap 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 crr with a 275 ml water load 3 When mounting the door assembly to the oven assembly be sure to adjust the door assembly parallell 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
18. RE TO GRASP THE CONNECTOR NOT THE WIRES 5 10 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 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 CAUSE REMEDY Microwave oven gt Inserting many plugs into one gt Avoid using other electrical does not work outlet and using them at the appliances when you use the same time microwave oven blown fuse or breaker Microwave oven plug is not Insert microwave oven plug inserted tightly securely Output power is too low Low AC input voltage gt Use the microwave oven at
19. S CONTROL PANEL PARTS 6 2 EV DOOR PARTS MODEL DFS11G DECS11MA UCS11MA DES11EA DFS11EA US11EA UFS11EA 6 3 CONTROL PANEL PARTS MODEL DFS11G CONTROL PANEL PARTS MODEL DECS11MA UCS11MA CONTROL PANEL PARTS MODEL DES11EA US11EA CONTROL PANEL PARTS MODEL DFS11EA UFS11EA EV OVEN CAVITY PARTS DECS11MA UCS11MA DES11EA DFS11EA US11EA UFS11EA MODEL DFS11G 6 8 EV LATCH BOARD PARTS MODEL DFS11G DECS11MA UCS11MA DES11EA DFS11EA US11EA UFS11EA 6 9 EV INTERIOR PARTS Discord original for parts supplied Change pieces simultaneously DECS11MA lt lt RI oo San US11EA UFS11EA MODEL DFS11G lt T A N D EV BASE PLATE PARTS MODEL DFS11G DECS11MA UCS11MA DES11EA DFS11EA US11EA UFS11EA AE r C _ A SCHEMATIC DIAGRAM
20. TION POWER TRANSFORMER g o 3 RY7 234 BN al 4 RY1 p SECONDARY PRIMARY INTERLOCK INTERLOCK SWITCH BLOWER MOTOR QN SWITCH 1 o 14 9 PK NTERLOCK MONITOR L SWITCH BN NC CN1 PK NC RD RY3 28 2 l WH Goce ES p o RY8 3 NN Gal Hic CIRCUIT PTC1 PROTECTOR MAGNETRON MEM PEU J H V DIODE CIRCUIT DESCRIPTION GENERAL DETAILS 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 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 PAD coil of the relay is energized by the micom controller Power input is supplied to the high voltage transformer through the fuse to primary switch and realy 3 e Stirrer fan rotates an PRIMARY INTERLLOCK SWITCH INTERLLOCK MONITOR SWITCH 5 TRANS FORMER _ SECONDARY RELAY 3 LY SWITCH go MICOM CONTROLLER fan motor rotates and cools the magnetron by blowing the ai
21. Ur NS Gm INDE Gm N SUB RELAY J38 n D 55 s dd ONN a mon 9 Ez TI P12 P3132 pamane x as Sunc 4148 o a 4 I Sx P gE 1 4 a p 8 o 2 5 T NY EN m AN less mos roe ne ne NC ne Ig a 2 ko 33 n Ta s u DN _ Ai2es por ho E aa e ee 2 d nv us 1 EN nmi srorr 1 gov Power Power Power rime 4 7 nae M row 5 s t ne Joe NC stan vy 4148 ua MEY Ll 1 SP E wc ne ne Im I IN CASE OF KEYPAD E A bibet E IN CASE OF DIAL 5 KEY DECS11MA UCS11MA 6 sy sv NRI EPA de BE BEI iEn 27 le 1 mo 5 Lolo Js fe fa fe fs 2 Rim i El i r Je o ne B m sre ne ne emen sran MONITOR SM OPTION av RT EEPROM RW 5 4 4 we we m 3 Nos Sipos Hx E IN CASE OF DIAL nsv Ver ol I DFS11G iov 8241516 0 5 E INRUSH AL eae T mh 000 il 4 strobe 1 5 i a Power is on MAGNETRON s read 11 D315 1 i 6 ans b Door is closed 2 1 c Door is open EEPROM 5 p PROGRAMMING i CONNECTOR d Oven Lamp Stirrer F
22. al Defective high Replace high tage capacitor voltage capacitor voltage capacitor Normal Check high vol gt Abnormal Defective high Replace high tage diode voltage diode voltage diode Normal Check Abnormal Defective Replace magnetron magnetron magnetron NOTE Make sure the wire leads 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 Disconnect the Abnormal Defective PCB Replace PCB when you set lower wire leads from assembly assembly power level relay 3 and check continuity relay 3 Operate the unit 5 15 EXPLODED VIEW INTRODUCTION MODEL DFS11G DECS11MA UCS11MA OVEN CAVITY PARTS BASE PLATE PARTS APR 952 LATCH BOARD PARTS DOOR PARTS CONTROL PANEL PARTS EV INTRODUCTION MODEL DES11EA DFS11EA US11EA UFS11EA OVEN CAVITY PARTS INTERIOR PARTS 5 e E D Z s f ff Y Y Y BEN Sa A A BASE PLATE PARTS LATCH BOARD PARTS DOOR PART
23. an is operating CN2 2mm 1 e Oven Lamp Stirrer Fan is not operating I f Blower Fan is operating i voles Rz g Blower Fan is not operating 1 h Magnetron is operating caf m N pes s7 102PT Ri21 i Magnetron is not operating vb 1 j Inrush relay is operating DOOR y Sues on res L k Inrush relay is not operating lo Fam C22 Prapre 42 5 NE 28 p32 is touched R25 NA x D22 1 0K 2 m Dial is touched D sov 57 oe n Buzzer is sounded _ 1 i N Ben ps P31 27 60 Ret Re TMP87CM14 PRINTED CIRCUIT BOARD 1 10 2 32 oP TES Fees TIT 6870W1A219A P1
24. any on the center of the turntable certified oven unit found to have a microwave Set the energy leakage monitor to 2 450 MHz and emission level in excess of 5 mW cm and should use it following the manufacturer s recommended repair any unit found to have excessive emission levels test procedure to assure correct result at no cost to the owner and should ascertain the cause When measuring the leakage always use the 2 inch of the excessive leakage The service personnel 5 cm spacer supplied with the probe should instruct the owner not to use the unit until the Operate the oven at its maximum output oven has been brought into compliance Measure the microwave radiation using and If the oven operates with the door open the service electromagnetic radiation monitor by holding the personnel should probe perpendicular to the surface being measured Tell the user not to operate the oven Contact the manufacturer and CDRH Move probe along shaded area Center for Devices and Radiological Health immediately Probe scanning speed NOTE Address on CDRH Less than 2 5 cm sec Office of Compliance HFZ 312 1in sec Center for Devices and Radiological Healthe 1390 Piccard Drive Rockville MD 20850 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
25. ctly 5 7 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 OVEN COMPONENTS TEST PROCEDURE RESULTS HIGH VOLTAGE TRANSFORMER Wire leads removed SECONDARY FILAMENT TERMINAL WINDING PRIMARY TERMINAL 1 Measure the resistance Ohm meter scale Rx1 and Rx100 Primary winding Approx 1 81 2 4 ohm Secondary winding Approx 110 125 ohm Filament winding Less than 1 ohm Measure the resistance Ohm meter scale Rx1000 Primary winding to ground Normal Infinite Filament winding to ground Normal Infinite MAGNETRON Wire leads removed Measure the resistance Ohm meter scale Rx1 Normal Less than 1 ohm Filament terminal Measure the resistance Ohm meter scale Rx1000 Normal Infinite Filament to chassis 5 8 COMPONENTS TEST PROCEDURE RESULTS Antenna Gasket Filament NOTE When testing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket i
26. e 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 cm2 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 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 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 initial temperature T1 of the water is 10 32 It is measured immediately before the water is added to the vessel After addition of the water to the vessel the load
27. e heating time countdown after door is opened during Reset Door Open cycle OP 61 Cancels heating time count down after door is opened during cycle 7 OP 70 Allows 60 minutes of heating time some models some models OP 71 Allows 10 minutes of heating time Maximum Heating Time 8 OP 80 Allows use of preprogrammed pads only Manual Operation OP 81 Allows use of manual time entry and preprogrammed pads 9 OP 90 Allows 10 0 9 preprogrammed pads some models OP 91 Allows 100 00 99 preprogrammed pads Double Digit Operation 0 OP 00 Do not display message Clean Filter Message OP 01 Display message for 24 hours every 7 days OP 02 Display message for 24 hours every 30 days OP 03 Display message for 24 hours every 90 days SCHEMATIC DIAGRAM punojJB sisseuo 01 1 JO euluui91 75 o o lt 2 o E 2 2 gt a lt gt a 2 lt UJ m O m m 2 lt Q Z G Q 2 D 5 2 E 2 lt y NOTE 1 DOOR IS OPENED 2 WIRE COLOR SYMBOL COLOR BN BROWN WH WHITE BK BLACK BL BLUE YL YELLOW PK PINK NOISE FILTER ASSEMBLY AC 230 240V 50Hz BL BN SINGLE PHASE ONLY FUSE BN MAIN PCB MGT TCO CURRENT TRANSFORMER OVEN TCO AUTO o VOLTAGE DETEC
28. elease 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 ADJUSTMENT DIRECTION MONITOR SWITCH PRIMARY SWITCH SECONDARY SWITCH INTERLOCK CONTINUITY TEST WARNING FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS TYPE NO SZM V 21 FC 93 FOR PRIMARY SWITCH TYPE NO SZM V 16 FD 62 OR V 16 2C 25 FOR MONITOR SWITCH TYPE NO SZM V 16 FD 63 OR V 16 3C 25 FOR SECONDARY SWITCH A PRIMARY INTERLOCK SWITCH TEST B SECONDARY 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 leads from the primary switch Connect the ohmmeter leads to Disconnect the wire leads from the secondary switch Connect the ohmmeter leads to the common COM and normally open NO terminals of
29. en 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 CONTENTS Page SAFETY PRECAUTIONS Hr Hm Inside front cover SPECIFICATIONS dcir 1 1 CAUTIONS srssu0000nn00nnn0nunnnnnn 2 1 INSTALLATIONS a en er 3 1 OPERATING INSTRUCTIONS Hmmm 4 1 COOKING DISPLAYS e seine ia nen 4 5 PROGRAMMING DISPLAYS e m meme eene eene 4 5 OPERATION ee ee ee abe een 4 6 PROGRAMMING sem net tn ne 4 7 SCHEMATIC DIAGRAM st meet 4 9 CIRCUIT DESCRIPTION Es 4 10 SERVICE INFORMATION Sa AAA ta eua aen 5 1 TOOLS AND MEASURING INSTRUMENTS a m mee e emen ee 5 1 MICROWAVE LEAKAGE TEST me ee meme eene 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT 5 3 DISASSEMBLY AND 5 3 INTERLOCK CONTINUITY TEST nat ae 5 7 COMPONENT TEST 5 8 TROUBLESHOOTING ee ee Er 5 11 EXPLODED VIEW 6 1 SCHEMATIC DIAGRAM OF P C B
30. inuity H No continuity m Defective Replace blow of thermostat thermostat thermostat gt Continuity Check continuity No continuity Defective power Replace power of power supply supply cord supply cord cord 5 13 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 CHECK RESULT CAUSE REMEDY 1 Setting time Check continuity No continuity y 22 T bei does not count of secondary secondary switch secondary switch down when switch with touching START door closed Continuity pad gt Check the con Continuity Defective PCB Replace PCB nection between assembly assembly CN1 connector gt and Te Connect them assembly No continuity Loose connection gt tightly 2 Blower motor I blower motor gt Abnormal Defective blower motor 3 Replace blower motor or oven lamp do not turn on Check oven lamp x gt Abnormal Defective oven lamp Replace oven lamp Normal TROUBLE 4 Oven seems to be operating but little heat is produced in oven load
31. is immediately placed on the center of the ceramic plate 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 10 2 is measured where 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 5 The microwave power output P in watts is calculated from the following formula 4187 x AT T is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included about 3 sec 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 CERAMIC PLATE AN WATER LOAD 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 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 RMOVAL 1 Open the door 2 Remove the screw for securing the control panel 3 Disconnect the leadwire from RELAY RY3 of the
32. lay shows current power level if other than 100 Example press 4 18 sec percent power 5 Press START pad Oven operates and time counts down 6 Oven stops heating and oven signal sounds when heating timing elapses PROGRAMMING Preprogrammed Number Pads Oven has 10 20 preprogrammed number pads Follow instructions below to program heating times and power levels for customized cooking 1 Open oven door If door is closed or RESET pad is pressed before finishing programming sequence oven exits programming mode 2 Press and hold pad 7 for approximately 5 seconds After 5 seconds signal sounds Display shows PROGRAM indicating program mode 3 Press desired number pad Display shows heating time COOK LEVEL and power level if other than 100 percent power 4 Press number pads to enter desired cooking time For example to heat for 2 minutes 30 seconds press 2 3 and 0 pads 5 Press desired power level pad to change power level If a power level pad is not pressed oven defaults to 100 power For example pressing MEDIUM 50 pad sets oven to 50 power Display shows current power level if other than 100 power 6 Press START pad to save new heating time and power level in oven memory Repeat step 3 6 to program additional pads 7 Press RESET pad or close oven door to exit programming mode Multiple Heating Stages Follow instructions below to program oven to perform 3
33. mounted properly microwaves may leak from the clearance between the door and the oven 5 4 Remove choke cover Remove door Door seal plate 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 ASS Y 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 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 Magnetron 5 5 G REMOVING THE STIRRER FAN MOTOR 1 Disconnect the leadwire from the stirrer fan motor terminals 2 Remove the screw securing the stirrer fan motor to the oven cavity ASS Y 3 After repairing the motor replace the removed leadwire NOTE 1 Remove the wire lead from the stirrer fan motor VERY CAREFULLY 2 Be sure to grasp the connector not the
34. netron ANTENNA x 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 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 Putthe 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
35. not exceed 4 mW cm Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage 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 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 leakage must not exceed the values prescribed below NOTE Leakage with the outer case removedless 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 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 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 prob
36. ondary 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 PRIMARY INTERLLOCK SWITCH INTERLLOCK MONITOR SWITCH SECONDARY PY SWITCH MICOM CONTROLLER SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS NECESSARY MEASURING INSTRUMENTS Tools normally used for TV servicing are sufficient TESTER VOLTS DC Ohmmeter Standard tools are listed below Microwave survey meter Diagonal pliers Holaday HI 1500 Long nose pliers 1501 Phillips screwdriver Narda 8100 Flat blade screwdriver B00 Inch scale Wrench size 5mm 600 cc non conductive material beaker glass or plastic Nutdriver size 5mm inside diameter approx 8 5 cm 3 2 in Adjustable wrench Cylindrical and made of borosilicate glass vessel Soldering iron max thickness 3 mm Solder outside diameter approx 190mm Vinyl insulation tape height approx 90mm Polishing cloth Glass thermometer 100 C or 212 F 1 deg scale MICROWAVE LEAKAGE TEST MEASURING MICROWAVE ENERGY Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to LEAKAGE servicing Pour 275115 cc of 20 5 C 68 9 F water in a beaker The service personnel should inform the which is graduated to 600 cc and place the beaker manufacturer importer or assembler of
37. pears after oven door is opened and closed 33 33 shows heating time When more than 1 heating stage is 71 71 71 71 71 1 programmed total time for all stages displays 71 71 71 m J COOK shows when oven is operating T az zu 20 indicates the microwave power level used If power level does not show oven is heating at 100 power Indicates programming mode See Programming section of manual for programming procedure Indicates programming user options mode See User Options section of manual for programming procedure 4 5 OPERATION Preprogrammed Times and Cook Level A CAUTION All preprogrammed pads arrive set at full power To avoid fire do not dry newspapers or clothes in Option Single Digit Option Double Digit MICTOWaVe Oven Heating Heating Heating Times Times Times 10 sec 10 sec 20 sec Interrupting Operation _ Open oven door to interrupt operation Oven fan continues to operate Close door and press START pad to resume oven operation Press STOP RESET pad to interrupt operation Display continues to show countdown time Press START pad to resume oven operation and countdown timing N 20 sec 20 sec 40 sec 30 sec 30 sec 1 min 45 sec 45 sec 1 30 min 1 min 1 min 2 min 1 30 min 1 30 min Canceling Mistakes If oven is operating press STOP RESET pad once to stop
38. r 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 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 negative 4 000 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 3 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 relay 3 is 12 WHEN THE DOOR IS OPENED DURING COOKING Both the primary switch and relay 3 cut off the primary winding voltage of the high voltage transformer ON OFF of relay 3 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 3 and or sec
39. s in good condition HIGH VOLTAGE Measure the resistance Normal Momentarily indicates CAPACITOR Ohm meter scale Rx1000 several ohms and Terminal to terminal then gradually returns to infinite Measure the resistance Normal Infinite Ohm meter scale Rx1000 Terminal to case HIGH VOLTAGE Measure the continuity Forward DIODE Ohm meter scale Rx10000 Normal Infinite Abnormal Continuity NOTE Some inexpensive meters may indicate infinite resistance in both direction Measure the continuity Reverse Ohm meter scale Rx10000 Normal Continuity Abnormal Infinite 5 9 COMPONENTS TEST PROCEDURE RESULTS RELAY 2 Check for continuity of relay 2 with an POWER ohm meter LEVEL Do oo Remove wire leads from relay 2 and operate the unit 3 sec 4 sec 5 sec 6 sec 7 sec 8 sec 9 sec 10 sec 11 sec 12 sec k o FAN MOTOR Measure the resistance Normal Approx 72 82 ohm Wire leads removed Ohm meter scale R x 1000 Abnormal Infinite or several K ohm STIRRERFAN MOTOR Measure the resistance Normal Approx 12 8 13 5 kohm Wire leads removed Ohm meter scale R x 1000 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 SU
40. t power level Oven can heat at full or reduced power If oven power level is set to 0 oven does not heat for programmed time If no power level is selected oven operates at 100 power STOP RESET Use to exit programming mode and stop cooking during cooking cycle START 1 2 3 5 7 9 O Use to start Manual Time Entry program or restart interrupted cooking cycle Use to advance to next user option Use to save times and power levels when programming pads QTY2x Use to automatically increase the programmed time for double quantities DFS11EA UFS11EA 4 2 OPERATING INSTRUCTIONS FEATURES Window Door Screen Electronic Control Safety Door Lock System CONTROL PANEL I 30 QUICK SET MENUMASTER EL NE DECS11MA UCS11MA Display Some items in display can be seen but will not glow COOK 11 LILI Pads DIAL Use to enter cooking time QUICK SET Use to begin heating with preprogrammed times and power levels 70 Use to select power level Oven can heat at 50 full or reduced power DEFROST START Use to start Manual Time Entry program or restart interrupted cooking cycle Use to advance to next user option Use to save times and power levels when programming pads
41. the switch The meter should indicate a 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 using only the same type of switch the common COM and normally open NO C MONITOR SWITCH TEST 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 using only the same type of switch Disconnect the wire leads 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 Wire leads removed switch with an Ohm meter Door Door open closed Primary Switch MCN CS Monitor Switch ERA pom Secondary Switch Ea connected corre
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