WARNING - ServiceMatters
Contents
1. 5 e q OVEN oR BROIL 3000W og SHUTDOWN oai us Bic b ARR THERMAL DLB RELAY d FUSE OGN RELAY LOGIC LOWER OVEN RELAY LOGIC MICROWAVE OVEN ef MODES DT EE OFF RELAY LOGIC KEY BAKE OFF CUSTOM BROIL LON CONV BROIL CONV BAKE CLEAN PREHEAT BAKE PREHEAT CONV PREHEAT CLEAN 3K IF LOWER OVEN IS IN CLEAN WILL NOT FUNCTION KR ON OR OFF zE ODE MICROWAVE A CYCLING MAX PERIOD 23 SEC CYCLING MAX PERIOD 90 SEC CYCLING MAX PERIOD 60 SEC CONV QUICK PREHEAT CONV COOK SPEED FOR SERVICE TECHNICIAN S USE ONLY PART NO 8302004 4 TECH SHEET DO NOT DISCARD PAGE 5 STRIP CIRCUITS The following individual circuits are for use in diagnosis Before starting diagnosis check the line voltage and for blown fuses BAKE AND PREHEAT BAKE OVEN L1 ELECTRONIC CONTROL N L2 UPPER BLOWER LOWER BLOWER R BAKE 2000W OVEN SHUTDOWN OR OR m E THERMAL DLB RELAY BROIL 3000w FUSE CONVECTION BAKE OVEN ELECTRONIC CONTROL THERMAL FUSE LOWER BLOWER e WIBK wek w RELAY ONTACT c Re RW BROIL 3000W OVEN SHUTDOWN o aa THERMAL FUSE DLB RELAY CONVECTION BROIL OVEN ELECTRONIC CONTROL N L2 RELAY contact BROIL 3000W OVEN SHUTDOWN THER2. x Thermal Fuse Secondary Interlock Switch Grill r amp Thermal Fuse Rectifier 15 Amp Line Fuse High Voltage Capacitor Magnetron Interlock Switch 23 Thermal Fuse Primary s MD High Voltage Interlock Switch LA Air Vont Transformer Cooling Fan Motor u Solenoid Magnetron Lower Blower Incandescent Lights Sensor Rear Panel Door Latch Assembly Latch and Latch Motor Convection d Fan Motor 2 Oven Shutdown Thermal Fuse Rear Panel CONTROL TRANSFORMER Low Voltage uu 1st LT Al Secondary 3 Bx 2nd gt Primary Secondary P17 1 Y SEC1 26VAC P17 2 Y BLK P17 8 P17 3 TAN TRONAS mu SEC2 24VAC W P17 10 P17 4 TAN 17 8 V 7 5VAC 17 6 V PART NO 8302004 FOR SERVICE TECHNICIAN S USE ONLY TECH SHEET DO NOT DISCARD PAGE 7 TESTING THE MICROWAVE OVEN COMPONENTS COMPONENT TEST PROCEDURE RESULTS HIGH VOLTAGE 1 Remove the leads from the terminals TRANSFORMER 2 Setthe ohmmeter to Rx1 and touch the leads to the terminals Primary Normal Less than 1 Q Secondary Normal Less than 1 Q Filament to Ground Normal 0 3 Measure resistance Rx100 Primary Normal Infinity Filament Normal Infinity MAGNETRON 1 Remove the leads from the terminals 2 Setthe ohmmeter to Rx1 and touch the leads to the F and FA Normal approximately 0 terminals 3 Set the ohmmeter to Rx1k and
3. LOGEN MICROWAVE e BA CAVITY LIGHT J1 5 L1 MAGNETRON FAN MONITOR SWITCH O FUSE TURNTABLE J1 4 PRIMARY INTERLOCK UPPER SWITCH BLOWER SPEED COOK MICROWAVE ELECTRONIC CONTROL LIGHT POWER SUPPLY HALOGEN MICROWAVE CAVITY LIGHT J1 5 MAGNETRON FAN GY MONITOR DOOR SHOWN R TURNTABLE ga SWITCH IN CLOSED oO POSITION CAVITY E o 20A 15A TOD MAGNETRON OUTPUT 2 TOD R b o PRIMARY O INTERLOCK SWITCH SECONDARY INTERLOCK P8 3 BR BR gy Coviron 09 CONVECTION TEMP SENSOR 280k Q 70 F 21 1 C UPPER BLOWER ELECTRONIC CONTROL N L2 LIGHT POWER SUPPLY L1 o DOOR SHOWN IN CLOSED POSITION CAVITY 15A MONITOR SWITCH O 1 INTERLOCK SWITCH CONVECTION TEMP SENSOR 280k Q 70 F 21 1 C GRILL GRILL 1200W w J1 6 w O oo PART NO 8302004 FOR SERVICE TECHNICIAN S USE ONLY PART NO 8302004 PAGE 6 TECH SHEET DO NOT DISCARD CAN BE TESTED AT CONTROL PANEL Microwave Light Transformer M W Rear FRONT TOP REAR COMPONENTS SERVICEABLE CHECK POINTS RESULTS Electronic Control Front Electronic Filter Front Membrane Switch Front Incandescent Light D
4. MAL FUSE DLB RELAY CLEAN OVEN ELECTRONIC CONTROL RETURN LINE MUST BE CONNECTED TAN DOOR SWITCH ON FT 1 LATCH ASSY BR DOOR LOCK MOTOR LATCH LATCH SWITCH OPERATED BY MOTOR TAN TAN CATY SIZE TAN S SELECT UPPER BLOWER LOWER BLOWER a ER OR ear RW 5 BAKE 2000W OVEN SHUTDOWN LOR OR THERMAL ane EDAAZO BROIL 3000w FUSE PEPER FULL POWER VARIABLE N POWER MICROWAVE LIGHT POWER SUPPLY BK 9 a MAGNETRON FAN DOOR SHOWN IN CLOSED MONITOR POSITION SWITCH TURNTABLE 20 15 CAVITY BK FUSE gk FUSE tan 900W OUTPUT o X o e 2 A i PRIMARY MAGNETRON SECONDARY D INTERLOCK TOD INTERLOCK SWITCH SWITCH UPPER BLOWER MANUAL CRISP ELECTRONIC CONTROL N 12 LIGHT POWER SUPPLY A A HALOGEN Tq E 9 MICROWAVE CAVITY LIGHT MAGNETRON FAN GY DOOR SHOWN IN CLOSED MONITOR POSITION FUREUR simon MICROWAVE m 20A CAVITY USE TOD L_900WOUTPUT 4 R SECONDARY INTERLOCK PRIMARY INTERLOCK SWITCH MAGNETRON UPPER BLOWER ILL 1200W GRILL Bu TOD GR ELECTRONIC CONTROL 2 BROIL NO MICROWAVE ENERGY LIGHT POWER SUPPLY HA
5. PENDING p H Oni PART NO 8302004 FOR SERVICE TECHNICIAN S USE ONLY
6. TECH SHEET DO NOT DISCARD PAGE 1 AWARNING PRECAUTIONS TO BE Electrical Shock Hazard OBSERVED BEFORE AND Disconnect power before servicing DURING SERVICING TO Replace all parts and panels before AVOID POSSIBLE EXPOSURE TO EXCESSIVE Failure to do so can result in death or electrical shock MICROWAVE ENERGY Do not operate or allow the oven to be Electrostatic Discharge ESD operated with the door open Sensitive Electronics Make the following safety checks on all ovens to ESD problems are present everywhere ESD may be serviced before activating the magnetron or damage or weaken the electronic control assembly other microwave source and make repairs as The new control assembly may appear to work well necessary after repair is finished but failure may occur at a Interlock Operation later date due to ESD stress Proper Door Closing W Use an anti static wrist strap Connect wrist Seal and Sealing Surfaces strap to green ground connection point or Arcing Wear and Other Damage unpainted metal in the appliance OR touch Damage to or Loosening of your finger repeatedly to a green ground Hinges and Latches i i i tal in th ds point or unpainted Evidence of Dropping or Abuse Before removing the part from its package touch Before turning on microwave power for any the anti static bag to a green ground connection service test or inspection within the microwave point or unpainted metal in the
7. appliance generating compartments check the _ Avoid touching electronic parts or terminal magnetron waveguide or transmission line and contacts handle electronic control assembly by ij a and connections edges only When repackaging failed electronic control assembly in anti static bag observe above instructions 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 service manual before the oven is released to the owner DIAGNOSTICS A microwave leakage check to verify Is oven in Sabbath Mode If so SAB will appear in compliance with the Federal performance digital display Press and hold 6 key for 5 seconds to standard should be performed on each oven end Sabbath Mode prior to release to the owner Disconnect power and perform the following checks Do not attempt to operate the oven if the door glass is broken m The most common cause for control failure is corrosion on connectors Therefore disconnecting and reconnecting wires will be necessary PROBLEM Bake Temperature Needs throughout the test procedures Adjustment W Check all connections before replacin components looking for BN os wires 1 Press BAKE pad for 5 seconds The default failed terminals or wires not pressed into temperature 0 or a previously entered offset connectors far enough temperature
8. bnormal Infinity ES 22 Cavity Thermal Fuse 329 165 C Cavity Grill and Magnetron Grill Thermal Fuse 320 F 160 C 284 F 140 C Thermal Convection Fan Thermal Magnetron Thermal Fuse 293 F 145 C 257 F 125 C Fuse Thermal Fuses Fuse Convection Fan Thermal Fuse 293 F 145 C 221 F 105 C GRILL ELEMENT 1 Remove the leads from the terminals Bulb 2 Set the ohmmeter to Rx1 and touch the leads to the terminals Normal 14 Q for both bulbs uns Normal 7 Q for one bulb Abnormal Infinity AIR VENT 1 Remove the lead from one terminal SOLENOID 2 Set the ohmmeter to Rx1k and touch the leads to the terminals Normal approximately 1650 Q Abnormal Infinity Thermal Fuse Opening Reclose Marking Part No Temp F Temp F with Black Letters 4452223 266 F 10 F Pink Wht Stripe 4451442 248 F 18 F to 248 F 0 Yellow Wht Stripe 4450934 338 F 11 7 F Red 4450334 275F 417 AX OrangelWht Stripe 4450250 320 11 7 Blue 4450249 302 F 11 7 Green Wht Stripe 8300802 230F 18 to 230 0 F Blue Wht Stripe FOR SERVICE TECHNICIAN S USE ONLY PART NO 8302004 PAGE 8 TECH SHEET DO NOT DISCARD IE Ne IV LLLLLL ZLLZLLLLLLLLLLLLLLLLLLL LLLL LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLEEEZZZZSNMSC MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING UNITED STATES PATENTS 4 102 322 4 364 589 4 467 184 OTHER PATENTS
9. g fault Press CANCEL to clear display ERE amp Electronic control malfunction Check oven door switch If OK replace control F1 m amp Electronic control malfunction Replace control E0 or E1 Keypad keytail not connected 2 4 1 Check keypad connector for firm connection E3 too long or key 2 Press CANCEL If error code returns after 60 sec replace keypad EO Temperature sensor opened 1 Check lower cavity sensor connection lower cavity 2 Measure sensor resistance 1080 2 at 70 F 21 C Add 2Q per degree F 3 If resistance is not valid replace sensor 1 Temperature sensor shorted 4 f sensor resistance and connections are good then check for welded closed relays on the F3 lower cavity control If relay is shorted replace control E2 Temperature sensor opened 1 Check microwave sensor connection microwave 2 Measure sensor resistance 280k 2 at 70 F 21 1k at 392 F 200 C 3 If resistance is not valid replace sensor E3 Temperature sensor shorted 4 If sensor resistance and connections are good then check for welded closed relays on the microwave control If relay is shorted replace control Lower cavity over temperature F5 E0 while cleaning See F3 Error Code E0 above Lower cavity over temperature a E0 during cooking See F3 Error Code E0 above Microwave cavity over E1 temperature during cooking See Error Code E2 above E0 Self clean latch will not lock 1 Check the latch asse
10. ices PLUG WITH g RELAY COIL gl qe ena oyo Circuit shown in standby off mode with microwave oven door and lower oven FEMALE CONNECTOR E door closed RECEPTACLE WITH RELAY OPERATED rm MALE CONNECTOR 0 CONTACTS BY DOOR BR __ LIGHT POWER SUPPLY N L1 E GND N L2 DOOR PY HALOGEN o 70 w M 1 MICROWAVE CAVITY E MAGNETRON Q On CAVITY LIGHT 20A 15A TOD FUSE FUSE _ TOD BR BK BK TA O O O O O O O PRIMARY D q INTERLOCK IBU TO SWITCH MONITOR P10 4 BKL ELECTRONIC FILTER WP 4451934 CONTROL A PT TRANSFORMER MAN TRON SECONDARY 900W OUTPUT INTERLOCK Al SWITCH T1 N MONITOR P103 y Y A GY SWITCH Y CONVFAN GY BU FROM BUR AIR VENT INTERLOCK Q CONVECTION SOLENOID SWITCH TEMP SENSOR 120 VAC 280k Q AT 70 F 21 1 C gr CONV 1500W yy po O AAA 2 W ay CONUTOD m 6 W P9 3 BU BK W J1 6 MICROWAVE R GRILL 1200W QJ RI ae lg El HA a a LOWER OVEN W VM TEMP SENSOR 1080 Q AT 70 F 21 1 C DOOR LOCK LOWER BLOWER EAN MOTOR LATCH Lit MUST BE CONNECTED DOOR SWITCH ry ON LATCH ASSY INCANDESCENT TAN OR BR BR W 15W BULB LATCH SWITCH OPERATED BY TAN MOTOR TAN BU BU W d P5 6 OR W D CAVITY SIZE TAN SELECT P rwv CONV FAN wek WIBK LOW TANE Y RELAY g BAKE 200W Bi b
11. mbly Check latch arm pivot joint arm motor connection plunger and hook springs E1 Self clean latch will not unlock gt Check the Latch Motor E2 Oven over temperature while Check for firm electrical connections door open and latch lock the m from the moa and ae the resistance s o motor e resistance should be approximately 24500 If the motor is open or E3 Oven over temperature while shorted 0 2 it should be replaced door open and latch unlock 3 Check the Latch Switch F8 Disconnect it and use a continuity tester Door latched switch closed continuity should read 0 2 Door unlatched switch open continuity should read Q E4 Oven over temperature while 4 Check Door Open Closed Switch door close and latch unlock Disconnect it and use a continuity tester Door closed switch closed continuity should read 09 Door open switch open continuity should read Q 5 Check power and element connections Fahrenheit F to Celsius C 1 Fill a glass measuring cup with 16 oz 453cc of tap Conversion water Stir the thermometer through the water until the temperature stabilizes The default is Fahrenheit F 2 Place the cup of water in the center of the oven 1 Press the BROIL pad for 5 seconds The Operate on HIGH for 60 seconds temperature will be displayed in degrees Celsius 3 Stir the thermometer through the water and record indicated by the C in the tempe
12. measure filament to chassis Normal Infinity CAPACITOR 1 Remove the leads from the terminals 2 Setthe ohmmeter to Rx1k and touch the leads to the terminals Normal Momentarily indicates several ohms and OVEN SHUTDOWN THERMAL FUSE The oven shutdown thermal fuse is located at the back of the oven It will shut down the elements if the temperature at the back of the oven exceeds component limits Verify that the oven shutdown thermal fuse is OK To replace this thermal fuse refer to chart at right for correct part number gradually returns to infinity 3 Terminal to chassis Normal Infinity RECTIFIER 1 Remove the leads from the terminals 2 Set the ohmmeter to Rx1k and measure forward resistance Normal Continuity Abnormal Infinity 3 Measure the reverse resistance Normal Infinity Abnormal Continuity NOTE Some inexpensive meters may show infinity in both directions FAN MOTOR 1 Remove the leads from the terminals 2 Setthe ohmmeter to Rx1 and touch the leads to the terminals Normal approximately 25 Abnormal Infinity TURNTABLE 1 Remove the leads from the terminals MOTOR 2 Setthe ohmmeter to Rx1 and touch the leads to the terminals Normal approximately 25 Abnormal Infinity THERMAL FUSES 1 Remove the leads from the terminals A 2 Set the ohmmeter to and touch the leads to the terminals Normal Continuity C lt N 2 Close A
13. oor Unlocked BU W to Open Circuit Latch Switch Front TAN Door backed Closed Circuit Latch Motor y We Approx 2450 Q Door Closed Door Switch P5 3 to Closed Circuit 5 1 TAN Open Circuit Oven Temperature P5 8 V W to Sensor p5 9 vw 1080 2 70 F Lower Console P7 5 GY W to Blowers Neutral W 2 4 or P3 1 Oven Shutdown RN Closed Circui to Red White osed Circuit Thermal Fuse Wire at DLB Relay Convection Fan P7 7 OR W to 180 Motor Lower Oven Neutral W P2 4 R to Bake Element Red White Wire 25 Q to 30 Q at DLBRelay P3 1 OR to Broil Element Red White Wire 17 Q to 20 Q at DLBRelay Primary 40010450 Winding Secondary Winding Less than 1 Q Halogen Light MW Light Bulb Front Light Assy Rear P7 6 VT to Neu Components Upper Blower M W Rear tral 10 Q to 15 Q Convection P10 3 Y to Neu Motor Fan M W ron tral W pis All Other Microwave Rear e B COMPONENTS LOCATIONS Electronic Control Behind Front es Blower Motor Electronic Filter mounted on Terminal Block L1 and Neutral gt DBL Relay Membrane MW Light Switch D 2 Transformer 20 amp Microwave Fuse M Control Transformer 1 I Grill Element Halogen Convection Convection Fan Assembly Light Fan Motor Thermal Air Pressure and Element Fuse Cavit Relief Valve and on Back uev
14. rature display the maximum temperature 2 To return the display to degrees Fahrenheit press 4 Subtract the cold water temperature from the hot the BROIL pad again for 5 seconds F will show in water temperature The normal result should be a the temperature display 20 38 F 11 1 21 1 C rise in temperature Microwave Oven Power Output Test NOTE Less than a 20 F 1 1 1 C temperature rise may indicate an operating voltage of less than 110 volts The power output of the magnetron can be measured or a low power output from the magnetron Cooking by the following test for accurate results the line time can be adjusted to compensate for either voltage must be 120 VAC and the oven cavity must be circumstance Replace the magnetron only if the water clean temperature rise indicates a power output well beyond the normal result Hm 9 ie Qr PART NO 8302004 FOR SERVICE TECHNICIAN S USE ONLY TECH SHEET DO NOT DISCARD PAGE 3 HEATING WIRE HARNESS SCHEMATIC REsEmBL OFO uem OL HG THERMAL FUSE T O D P NOTES When replacing the electronic control be sure to attach the cavity select line to NON RESETABLE ONE TIME ACDRIVE M SOLENOID the proper terminal see CAVITY SIZE table below GROUND CHASSIS MOTOR Dots indicate connections or spl
15. will show in the Temperature Display W All tests checks should be made with a VOM or m Press the BAKE pad to increase the DVM having a sensitivity of 20 000 ohms per volt temperature in 5 F or 3 C increments DC or greater m Press the BROIL pad to decrease the W Resistance checks must be made with power cord temperature in 5 F or 3 C increments unplugged from outlet and with wiring harness or Maximum offset temperature adjustment is 35 F connectors disconnected or x21 C 2 Press the START pad to save the temperature adjustment p Ew FOR SERVICE TECHNICIAN S USE ONLY PART NO 8302004 2 TECH SHEET DO NOT DISCARD AAA AAA AAA AAA AAA E Upon replacement immediately return old electronic oven FAI LURE ERROR DISPLAY CODES control using the mailing label supplied with each new control NOTES E For combo ovens the failure code is displayed on the side of the display that corresponds to the oven with faulty part W Always unplug microwave oven or disconnect power before upper oven left side of display touching internal parts of the oven FAULT ERROR MEANING OF CODE CODE FAILURE CODE RECOMMENDED REPAIR PROCEDURE Will only be displayed if user presses and holds the UPPER OFF key for 5 seconds and ED E0 Default F code no failure there is no pre existin
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