SERVICE MANUAL Microwave Oven EM
Contents
1. See exploded view on page 15 1 Unfasten 1 screw for earth and pull out 2 wires of power cord from terminal plate 2 Remove 1 screw for bottom bracket of cord bushing 3 Install the new power supply cord with reverse procedure of above 1 to 2 WARNING For the changing the power supply cord never use other than following Key No Order No Mail body Parts 1 5 617 208 1472 Power cord Ass y 6 617 180 3211 Cord bush 20 617 140 1349 Bottom bracket G REMOVING CERAMIC TRAY ASS Y See Fig 12 1 Take off the cabinet 2 Put insert a screwdriver in the 9mm diameter hole locating at lower hinge of left side of the oven cav ity And push the tray up with the screwdriver 3 Open the door and take out the tray very carefully Parts Name ole z 38 Q C 898 gee Se ow n NAUES Screw driver Figure 12 H REMOVING DOOR Remove 3 hex nuts securing the upper hinge remove 3 hex nuts securing the lower hinge and remove 1 special screw securing the door arm located at the bottom of the door sash NOTES After replacing the door be sure to check that the primary interlock switch the door sensing switch and the interlock monitor switch operate normally See pages 1 and 6 After replacing the door check for microwave energy leakage with a leakage detector Microwave energy leakage must be below the limit of SmW cm ILHOW TO RESET THE MEMORY OF ACCUMULATIVE COOKING TIME 1 Push the keys step by ste2. IRCUIT BOARD 1 Disconnect all lead wires of the Control panel from the Control PCB and Power PCB 2 Remove 3 screws securing the Control panel Assy to the oven cavity 3 Push up and pull out the Control panel Assy 4 Remove 4 screws securing the Display PCB 5 Take out the Display PCB and push up the lever end of the plastic fastener and remove the FPC connector from the connector socket S101 CAUTION When replacing new Display PCB please take big care that all 10 LED heads should exactly be inserted into the square holes of control frame all at once Never force to push any LED lead in the PCB E REMOVING MAGNETRONS 1 Remove 2 screws securing the thermal limitter 2 Disconnect 2 lead wires from the magnetron ter minals by removing 2 connectors 3 Remove thermistor lower magnetron by pulling horizontally 4 Remove 4 hex nuts upper magnetron or 2 hex nuts lower magnetron securing to the waveguide 5 Remove lower magnetron 6 Take out the magnetron VERY CAREFULLY NOTES When removing the magnetron make sure that its dome does not hit any adjacent parts or it may be damaged 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 After replacing the magnetron check for microwave make sure the microwave energy leakage is below the limit of the regulation SmW cm F CHANGING POWER SUPPLY CORD
3. ORD FROM THE WALL OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT PROCEED WITH TESTS ONLY AFTER DISCHARGING THE windings yy yy HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD __ Filament WIRES ON THE PRIMARY WINDING OF THE HIGH VOLT windings AGE TRANSFORMER SEE FIGURE 2 Figure 2 A TEST PROCEDURES COMPONENT 1 Check for resistance Across the filament Normal reading terminal of the magnetron with an ohm meter Less than 1 ohm MAGNETRON on Rx1 scale G Figure3 2 Check for resistance Between each filament Normal reading terminal of the magnetron and the chassis Infinite ohms ground with an ohm meter on highest scale COMPONENT CHECKOUT PROCEDURE RESULT HIGH VOLTAGE TRANSFORMER HIGH VOLTAGE CAPACITOR Including bleeder resistor HIGH VOLTAGE DIODE 1 Measure the resistance With an ohm meter on Rx1 scale a Primary winding b Filament winding c Secondary winding 2 Measure the resistance With an ohm meter on highest scale a Primary winding to ground b Filament winding to ground Figure 5 Measure the resistance Across two terminals with an ohm meter on highest scale Figure 6 Measure the resistance Across two terminals with an ohm meter on highest scale Measure the resistance Across two terminals with an ohm meter on highest scale Normal reading a Approximately 1 0 ohms b Less than 1 ohm c Approximately 60 ohms Normal reading a Infinite
4. SANYO SERVICE MANUAL Microwave Oven EM C1900 GERMANY X79 ee OREO KKK KAS Treaee SSR RRR KKK IKK NA 1424244244 A SRR RRR RID SRE R RII RRR KKK ROKK KRY LRLS 2 KOO re SOR KK KKK RAI rar ee RK K MRSS Sn PRR RRR RK eo RKO S SNS N NII HES IS SSR SSRI XR SZ xX 2 Q 2 2 2 gt 2 2 Q Q92 2 2 Q ESS E Pro Code No Model No 437 623 01 EM C1900SD Foreword Read this manual carefully especially precaution on microwave energy and follow the procedure strictly careless servicing and testing may expose yourself to the microwave energy leakage PRECAUTIONS 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 compart ments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections d Any defective or mi
5. can be selected The display of remaining cooking time when cooking is temporarily stopped due to door opening can be selected The Accumulative cooking time period will inform the service technician of the life expectation of the magnetron or other parts Key Operation Step KEY OPERATION DISPLAY WINDOW e Press CLEAR key e gJ e Press TIME key e Press 8 three times Key operations at Step 1 thru Step 3 are common to all functions Proceed with the key operation at Step 4 for your desired functions e Select the function to press the number key listed below 1 Accumulative cooking time 2 The number of door operations See HINT at Step 6 3 Indication of remaining cooking time when cooking is interrupted by door opening 4 To cancel remaining cooking time 5 Tone of the buzzer on cooking completion Pip Pip Pip 6 Tone of the buzzer on cooking completion Peep 7 The buzzer off 8 The buzzer on e g Number 1 key is pressed for Accumlative cooking time period K Press START key All 4 digits will be flashing Press START key again The number 215 shows total cooking time in hours When number key other than 1 or 2 is pressed at step 4 0 appears in display window and the setting has been com pleted Note When number 2 is depressd at Step 4 above the displa
6. ch voltage Measure the voltage Between test points TP 1 TP 2 Test point TP 3 and ground See Figure 16 on page 25 TP Voltage CONTROL PCB Note TP 1 DC 5V Proceed with the check of the control P C B to see if TP 2 DC 12V any one of the measured values is different from the TP 3 DC 16V specified values TP 4 DC 35V B TROUBLESHOOTING CONDITION TROUBLE CHECK RESULT REMEDY Power with normal voltage is applied Place a cup of water inside Step down gt Shorted p Replace microwave oven Transformer i C 7 1 ra 0 0 and lt gt keys Fuse 10A blows off H V Capacitor Shorted Replace are touched immediately H V Diode Shorted Replace Connection of gt Incorrect Reconnect FPC from Touch key board No display cook Power circuit Voltage p Replace ing time board incorrect See page 7 Touch key Resistance Replace board incorrect See page 6 Control circuit gt Voltage Replace board incorrect See page 7 Door sensing gt No continuty gt Replace switch See page 6 Cooking operation Interlock switch No continuty gt Replace will not start See page 6 Control gt Voltage Replace circuit board incorrect See pages 7 amp 25 Note Oven will not accept settings of 60 through to 99 seconds TIME must be entered as 1 minute and 39 seconds for 99 seconds CONDITION TROUBLE CHECK RESULT REMEDY Lowmicrowave Magnet
7. cumulative cooking time is observed the following consumable components should be replaced 5 Blower motor Part No 617 196 9245 Page 20 No 1 When slow rotating of blower motor is observed after removing dust from blower motor blower motor must be replaced 6 Door hinge Part No 617 120 3028 Page 21 No 11 When a worn door hinge is observed and proper door adjustments can not be made the door hinge must be replaced 7 Door Assembly Part No 617 239 6354 Page 21 No 8 When a worn door pin is observed and proper door adjustments can not be made the door assembly must be replaced 14
8. e 4 Place the container on the center of oven cavity 5 Set the heating time for 26 seconds and rating full power and then start oven 6 Take the container out immediately when heating time is up 7 Stir water for making even water temperature in the container 8 Measure water temperature Water temperature rise shall be 8 to 12 C 4 PRECAUTIONS AND REPAIR SERVICE TIPS PRELIMINARY A SINCE NEARLY 4 000 VOLTS EXISTS IN SOME CIRCUITS OF THIS MICROWAVE OVEN RE PAIRS SHOULD BE CARRIED OUT WITH GREAT CARE B TO AVOID POSSIBLE EXPOSURE TO MICRO WAVE ENERGY LEAKAGE THE FOLLOWING PRECAUTIONS MUST BE TAKEN BEFORE SER VICING 1 Before the power is applied a Open and close door several times to make sure the door interlock switch and interlock monitor switch operation properly Listen for the click ing sound from switches Make sure the interlock monitor switch is closed after the latch interlock switch is open when the door is opened See pages 1 and 6 b Make sure the perforated screen and the choke dielectric of the door are correctly mounted 2 After the power is applied a Open and close the door to see if the interlock mechanism operates properly b Check microwave energy leakage with a leak age detector and confirm the energy leakage is below 5mW cm 3 Do not operate the unit until it is completely re paired if any of the following conditions exists a Door is not closed firmly a
9. gainst the cavity front b The hinge is broken c The choke dielectric or the door seal is dam aged d The door is bent or warped or there is any other visible damage to the oven that may cause mi crowave energy leakage Note Always keep the seal clean e Make sure that there are no defective parts in the interlock mechanism f Make sure that there are no defective parts in the microwave generating and transmission assem bly especially wave guide 4 Following items should be checked after the unit is repaired a The interlock monitor switch is connected cor rectly and firmly b The magnetron gasket on the magnetron is prop erly positioned c Wave guide and oven cavity are intact No leak age of microwave energy d The door can be properly closed and the safety switches work properly e The oven must be stopped when the door is opened or the time is up The oven must not be operated with any of the above components removed or bypassed HINT FOR LAMP CHANGE Before removing the bulb access panel pull out the main plug Change the faulty bulb and secure the bulb access panel Plug the cord back in and check op eration FUNCTION OF KEY SWITCHES Please read each function key below Power Key Memory Key 1 Start Key Clear Key Time Key Sy eJ elel Primary Winding Secondary 6 TEST PROCEDURES AND TROUBLESHOOTING CAUTION DISCONNECT THE POWER SUPPLY C
10. he immediately CLEAR key is touched The key for lt gt is not Remark The purpose of this This error function will be cancelled when the touched within 1 minute function is to avoid accidental door is opened and closed after the door is opened operation while the user is or closed not attempting to operate the oven Thermistor Chart Thermistor connector Duct se E 7000 cp CO ee 2 wg ee e S A d ces LE A e a e O 5 sooo ae Magnetron 2 2000 a es L ieee Os a C E Rye a a a 0 10 20 30 40 50 60 Temperature C HINT PROCEDURE FOR DETERMING WHETHER THE UPPER MAGNETRON CIRCUIT OR LOWER MAGNETRON CIRCUIT IS DEFECTIVE SYMPTOM One magnetron does not work giving less than normal heat Caution Make sure that cabinet outer wrap and rear plate are not removed from the oven for your safety 1 Operate oven as follows 1 Place a cup of water in the oven 2 Close the door 3 Touch CLEAR TIME 5 0 and START keys to operate the oven for 50 seconds with full power level 2 Determine if the Exhaust air is warm in the following positions 1 Put your hand near the exhaust duct outside of the rear plate to feel the exhaust Never remove the cabinet and rear plate from the oven for your safety when you put your hand near exhausting duct 2 lf air from the upper position of the duct is not warm the upper magnetron circuit is defective If air from the lower position of the d
11. hes Then pull out the switches 3 Make necessary adjustments or replacement of switch by the reversing step 2 and check micro wave energy leakage according to 1 ADJUST MENT PROCEDURE FOR SWITCHES on page 1 after it is replaced with new one and check proper operation of it according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 WHEN REPLACING ANY DOOR MICROSWITCH REPLACE WITH THE SAME TYPE SWITCH SPECI FIED ON THE PARTS LIST C REMOVING FUSE Remove the 10A fuse with screwdriver NOTES When replacing the 10A fuse be sure to use an exact repair part If the 10A fuse blows immediately check the primary 241 interlock switch the relay 3 and 4 on the control circuit board and the interlock monitor switch according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 and make sure to check the microwave energy leak age according to 1 ADJUSTMENT PROCEDURE FOR SWITCHES on page 1 when the primary interlock switch the relay 3 and 4 or the interlock monitor switch is adjusted or replaced If the primary interlock switch the relay 3 and 4 or the interlock monitor switch operate properly determine which of the followings is defective control circuit board blower motor gear motor high voltage transformer high voltage capacitor high voltage diode or magnetron If the high voltage diode is defective replace not only the high voltage diode but also the fuse diode D REMOVING DISPLAY C
12. hes and check for the continuity of the switches connecting an ohm meter to its terminals SWITCHES CHECKOUTPROCEDURE DOOR OPEN DOOR CLOSE See Figure 1 on page 1 INTERLOCK MONITOR Terminals COM and NC CAUTION After checking the switches make sure that the interlock monitor switch is properly connected accord ing to the CIRCUIT DIAGRAM on page 3 WARNING Primary When removing the cabinet you must disconnect the power supply cord from the wall outlet for your safety Only the checkout procedure below needs the power supply on TAKE GREAT CARE to avoid possible shock For your safety proceed with the test only after re moving the wire leads from the primary winding of the high voltage transformer Primary windin Figure 10 COMPONENT CHECKOUT PROCEDURE RESULT Check each voltage at connector S104 and S105 Normal reading after removing each connector female from power circuit board Connection Pin No 3 Ground and 4 5 1 2 at S105 Pin No Voltage Pin No 1 and 2 at S104 105 3 to 4 DC 12V CAUTION 3 to 5 DC 16V Proceed with the test only after removing the 3 to 2 DC 30V wire leads from the primary winding of high volt 3 to 1 DC 35V age transformer for your safety 104 Test procedures 1 to 2 AC 2 4V a Make sure that the power supply cord is not plugged in b Remove the connector S104 and S105 from the power circuit board c Plug the power supply cord d And then measure ea
13. ohms b Infinite ohms Note Remove varnish of measured point Normal reading Momentary indicates several ohms and gradually to 10 meg ohms Abnormal reading Indicates continuity or 10 meg ohms from the beginning Normal reading Indicate about the middle position in one direct forward and infinite onms in the reverse direction using meter with a 9 volts battery NOTE Some digital meter may show over even in a forward direction because low measuring voltage of meter does not allow the meter to pass through the high voltage diode Abnormal reading Indicates continuity or infinite ohms in both directions Normal reading Indicate infinite ohms in both direc tions Abnormal reading Indicates continuity in both directions or continuity in one direction and infinite ohms in reversed direction COMPONENT CHECKOUT PROCEDURE RESULT Measure the resistance between terminals of ated not TOUCH KEY FPC connector after removing it from Resistance touched touched i Value Less than More than BOARD S101 Figure 9 NOTE 1K ohms 1M ohms When reconnecting the FPC connector make sure the holes on the connector are properly inserted in hook of the plastic fastener in S101 MATRIX CIRCUIT FOR TOUCH KEY BOARD When checking 4 key connect ohm meter as illustration below FPC CONNECTOR TERMINAL OF FPC CONNECTOR Figure 9 CHECKOUT PROCEDURE FOR SWITCHES Disconnect the lead wires from the switc
14. p as follows COQ 7878 B71 ae The display will show accumulative cooking time in the display window 2 Then push the keys as follows 7 0 ie Accumulative cooking time will be cleared J CAUTION FOR CUSTOMER ON OPENING AND CLOSING DOOR When the Microwave oven is in operation should the customer open the door slightly and close the breaker of the house will occasionally be cut off It is necessary to explain to the customer not to ex ercise such matter When the Door is opened slightly between 2 or 3mm distance primary interlock switch turn OFF and operation stops However door sensing switch will remain ON and if door is closed primary interlock switch activates and operation resumes immediately At such time microwave oven will start any time Therefore a big In rush current flows and thus breaker will be cut off K RELEASING TYPE CONNECTOR This oven is provied with locked type connector When you remove a connector pull the connector while releasing the lock by pressing A point shown below Do not pull the wire of the connector Connector S1 S2 102 S104 S105 Figure 13 D Figure 13 Figure 14 Pull connector case Never pull the wire Figure 15 L ADDITIONAL FUNCTIONS The following functions can be completed by the key operation described below The Accumulative cooking time and the number of door opening closings can be observed The Type and level of the buzzer sound
15. re is about zero gap between the latch lever and the switch body on the door primary interlock switch and the at the same time there is about zero gap between latch lever and the switch body on the door sensing switch when the door latch is securely locked 3 Tighten the lever stopper screws securely 4 Make sure the interlock monitor switch closes after the primary interlock switch opens the door is opened very slowly according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 5 Make sure the interlock monitor switch opens before the primary interlock switch closes when the door is closed very slowly according to CHECKOUT PRO CEDURE FOR SWITCHES on page 6 Test Procedures and Troubleshooting 4 10 Disassembly Instructions ccecseeeeeeeeeeeeees 11 14 Exploded View and Parts List cceee 15 22 Overall Circuit Diagram cccccceeeeeeeeeeeaeeeeees 23 24 Control Circuit Board cccccecceseeeeeeeeeeeeneeeeeeeeeees 25 6 Make sure the microwave energy leakage should be no greater than 5 mW cm2 to allow to measurement uncertainty when measured with a detector All service adjustments must be made for minimum microwave energy leakage readings NOTE If the interlock monitor circuit operates and at the same time the fuse blows with the door opened be sure to replace the relay circuit board because relay 3 and 4 on the control circuit board the door sensing s
16. ron Poor Replace output oscillation Uneven heating Rotation of top or Gear motor Repair or bottom antenna rotation has replace stopped C ERROR INDICATION The Display will show an error indication for self diagnosis as follows E means that a service technician is required U means that user can correct the operation E 21 Thermistor on duct Oven stops heating Check and remove the cause of the cavity fire senses a temperature of Buzzer continuously beeps or abnormal overheating 120 C or higher Blower motor will stop imme This error function will be cancelled when the diately power cord is unplugged Thermistor on Magnetron Oven stops heating Check for short circuit of thermistor itself or or Duct is shorted Buzzer does not beep wire insulation of thermistor Blower motor will stop This error function be cancelled when the immediately power cord is unplugged Thermistor on Magnetron Oven stops heating Check for open circuit of thermistor itself or or Duct is opened Buzzer does not beep improper connection of wire socket of ther Blower motor is operated mistor This error function be cancelled when the CLEAR key is touched Thermistor on Magnetron Oven stops heating Check and remove cause of abnormal over senses a temperature of Buzzer continuously beeps heating Such as operation with no food 225 C or higher Blower motor will stop This error function will be cancelled when t
17. sadjusted 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 REFERENCE NO SM 6410022 00 TABLE OF CONTENTS Adjustment Procedures cccccecseeeeseeeeeeeeeneeeenaees 1 SPS CICAUOMS nanii e 2 Power output Measurement cccecceeeeeeeeeeeeeeees 2 Precautions and Repair Service TipS 0cceceeeees 2 Circuit Diagram cccceccecseeeceeeeeeeeeeeeeseeeeeseeeeesaeeeeeas 3 CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE FROM THE MAGNETRON OR OTHER MICROWAVE GENE RATING DEVICE IF IT IS IMPROPERLY USE OR CON NECTED ALL INPUT MICROWAVE CONNECTIONS WAVEGUIDE FLANGES AND GASKETS MUST BE SECURE NEVER OPERATE THE DEVICE WITHOUT A MICROWAVE ENERGY ABSORBING LOAD AT TACHED NEVER LOOK INTO AN OPEN WAVE GUIDE OR ANTENNA WHILE THE DEVICE IS ENERGIZED 1 ADJUSTMENT PROCEDURES TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE THE FOLLOWING ADJUST MENTS OF THE INTERLOCK SWITCHES SHOULD BE MADE ONLY BY AUTHORIZED SERVICE PERSONNEL PRIMARY INTERLOCK SWITCH INTERLOCK MONI TOR SWITCH AND DOOR SENSING SWITCH AD JUSTMENT Figure 1 1 Loosen 2 screws securing the lever stopper 2 Adjust the lever stopper position so that it is pushed up and pull backward until the
18. uct is not warm the lower magnetron circuit is defective Cabinet outer wrap Rear Plate aa 7 Rear Plate Upper position I 0 Exhaust Duct Lower position Figure 11 The H V Transformer for operating The H V Transformer for operating the upper Magnetron is located on the lower Magnetron is located on the inside of the rear plate the inside of the rear plate 10 7 DISASSEMBLY INSTRUCTIONS OVEN MUST BE DISCONNECTED FROM ELECTRI CAL OUTLET WHEN MAKING REPLACEMENTS RE PAIRS ADJUSTMENT AND CONTINUITY CHECKS BEFORE PROCEEDING WITH ANY REPAIR WORK AFTER DISCONNECTING WAIT AT LEAST 1 MINUTE UNTIL THE CAPACITOR IN THE HIGH VOLTAGE AREA HAS FULLY DISCHARGED A REMOVING PRIMARY INTERLOCK SWITCH See Figure 1 on page 1 1 Disconnect all lead wires from the primary inter lock switch 2 Remove 2 screws securing the lever stopper 3 Remove 1 screw securing the switches Then pull out the switches 4 Make necessary adjustment and make micro wave energy leakage check according to 1 AD JUSTMENT PROCEDURE FOR SWITCHES and page 1 after it is replaced with new one and check proper operation of it according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 B REMOVING INTERLOCK MONITOR AND DOOR SENSING SWITCH See Figure 1 on page 1 1 Disconnect all lead wires from the interlock moni tor switch and door sensing switch 2 Remove 1 screw securing the these switc
19. witch and the electric circuit related on the door sensing switch which act as Secondary Interlock switch Lever stopper Interlock monitor switch Latch lever Primary Interlock switch Latch lever Door sensing switch Screws Figure 1 2 SPECIFICATIONS Microwave output 1 900W to 190W Frequency cccccceeceeeeeseees 2 450MHz Power supply ccceeeees 220 230V 50HZ Rated current 0000 12 8A Safety Device 00000 Thermal limitter Magnetron 150 C Open Thermal limitter Duct 140 C Open Thermistor Magnetron 165 C Open Thermistor Duct 66 120 C Open Fuse Cartridge Type 250V 10A x2 Micro switch Relay Primary interlock switch Interlock monitor switch Door sensing switch and Relay RL 3 and 4 Max input time Electronic Digital up to Manual 10min Memory 6min power level 10 6 30min power level 5 0 Overall Dimensions 422 W x540 D x335 H mm Oven Cavity size 330 W x330 D x230 H mm Effective Capacity of Oven Cavity 19 1 liters Net WCIGIM iiscciislcticukianledcenettihaintoeegat 32Kg 3 POWER OUTPUT MEASUREMENT 1 Prepare 1000 5g tap water 2 Adjust water temperature to 10 2 C 3 Pour water into a container made of borosilicate Glass 190mm outer diameter cylinder maximum 3mm thickness Note Use the container kept on the room tem peratur
20. yed figure shows the number of door operation 100 e g 20 displayed 2000 door operations e Press CLEAR key to clear the display for the option 1 and 2 e The function is cleared and 0 will appear in the display window O D 43 Maintenaunce The microwave ovens are designed manufactured and tested for years of dependable operation Howevre the oven may require service from time to time if the consumable components listed below are not replaced at the appropriate time For protection from unexpected service calls and undue inconvenience we recommend that the user has the listed parts replaced at the intervals belows at customer cost This will avoid the trouble of repeated service calls after the expiration of the warranty period Consumable components When more than 1 250 hours of accumulative cooking time or more than 200 000 cycles of door opening closing is observed by key operations See page 13 for more information the following consumable components shoud be replaced Maintenance light in window display indicates when accumulativ cooking time reaches 1 250 hours Light 1 Magnetron Tubu Part No 415 003 1709 Page 20 No 2 2 Printed Circuit Board Relay Part No 617 202 0150 Page 17 No 25 3 Switch base Assembly Part No 617 206 7865 Page 20 No 7 4 Door Latch part No 617 068 1087 Page 21 No 16 When more than 2 000 hours of ac
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