Whirlpool AKM4000, Service Manual

Page 1: ...WAVE OVEN 1 Precaution 2 Specifications 3 Operating Instructions 4 Disassembly and Reassembly 5 Alignment and Adjustments 6 Troubleshooting 7 Exploded Views and Parts List 8 PCB Diagrams 9 Schematic Diagrams Manual AKM4000 HOME APPLIANCES ...

Page 2: ...s 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 s...

Page 3: ...ve their watches while repairing an MWO 11 To avoid any possible radiation hazard replace parts in accordance with the wiring diagram Also use only the exact replacements for the following parts Primary and secondary interlock switches interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary door sensing switch and power...

Page 4: ...pacitor remains charged about 30 seconds after disconnection Short the negative terminal of the high voltage capacitor to to the oven chassis Use a screwdriver 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components PRECAUTION There exists HIGH VOLTAGE ELE...

Page 5: ...TPUT POWER OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS mm NET WEIGHT SHIPPING WEIGHT 99 MINUTES 99 SECONDS 110V 60Hz AC MICROWAVE 1 550W FROM 90 TO 900W 10 LEVEL POWER IEC 705 TEST PROCEDURE 2 450MHz OM75P 31 ESS COOLING FAN MOTOR 523 W x 300 H x 413 D 17 5 kg 19 kg ...

Page 6: ...Instructions 3 1 Control Panel 3 2 Features External Views Door Ventilation Holes Light Safety Interlock Holes Control Panel Open Door PushButton Guide Roller Glass Tray Door Latches 555mm 401 5mm 313mm 260mm 439mm ...

Page 7: ...ot hit any adjacent parts or it may be damaged NOTE2 When replacing the magnetron be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good 4 2 Replacement of High Voltage Transformer 1 Discharge the high voltage capacitor 2 Disconnect all the leads 3 Remove the mounting bolts 4 Reconnect the leads correctly and firmly PRECAUTION There exists HIGH VOLTAGE ...

Page 8: ... Door C Be careful when handling Door C because it is fragile 4 3 3 Removal of Door E Following the procedure as shown in the figure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound 1 Insertion depth of the thin metal plate should be 0 5mm or less 4 3 4 Removal of Key Door Spring Remove pin hinge from Door E Detach spring from Door E and key door Door E Ke...

Page 9: ...ate properly check if any other part such as the control circuit board blower motor or high voltage transformer is defective 4 5 Replacement of Drive Motor 1 Take out the glass tray guide roller and coupler from cavity 2 Turn the oven upside down to replace the drive motor 3 Remove a screw securing the drive motor cover 4 Disconnect all the lead wires from the drive motor 5 Remove screws securing ...

Page 10: ...rd from the Ass y control box 4 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener 4 6 3 Removal of Window Display Membrane Panel 1 Window display should not be disassembled as its mounting tabs will be broken If repair work is difficult replace with Ass y control panel 2 The membrane key board is attached to th...

Page 11: ...from the circuit by disconnecting its leads 3 A continuity check across the magnetron filament terminals should indicate one ohm or less 4 A continuity check between each filament terminal and magnetron case should read open SHV U1040B Secondary Filament Primary 92 8Ω 10 Shows Continuity 0 374Ω 10 Terminals Resistance SLV 4290U 2 3 Input 4 5 Output 7V 7 8 Output17V 379Ω 10Ω 32Ω Primary Terminals F...

Page 12: ...to Latch Body consult the figure 2 No specific adjustment during installation of Primary switch and Monitor switch to the latch body is necessary 3 When mounting the Latch Body to the oven assembly adjust the Latch Body by moving it so that the oven door will not have any play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment...

Page 13: ...n 4 When heating is finished stir the water again with the thermometer and measure the temperature T2 5 Subtract T1 from T2 This will give you the water temperature rise T 6 The output power is obtained by the following formula Output Power 4 187 x 1000 x T 0 55 x Mc x T2 T0 46 Heating Time sec 46 4 187 Coefficient for Water 1000 Water cc T Temperature Rise T2 T1 Mc Cylinedrical borosilicate glass...

Page 14: ... at the highest power level 4 Set survey meter dual ranges to 2 450MHz 5 Using the survey meter and spacer cone as described above measure near the opening of magnetron the surface of the air guide and the surface of the wave guide as shown in the following photo but avoid the high voltage components The reading should be less than 4mW cm2 5 11 Note on Measurement 1 Do not exceed the limited scale...

Page 15: ...dure Replace PCB main Timer starts countdown but no microwave oscillation No heat while oven lamp and fan motor turn on 1 Off alignment of latch switches 2 Open or loose connection of high voltage circuit especially magnetron filament circuit NOTE Large contact resistance will bring lower magnetron filament voltage and cause magnetron to lower output and or intermittent oscillation 3 Defective hig...

Page 16: ...ain Loud buzzing noise can be heard 1 Loose fan and fan motor 2 Loose screws on H V Transformer 3 Shorted H V Diode Tighten screws of fan motor Tighten screws of H V Transformer Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor 2 Defective turntable motor Replace turntable motor Oven stops operation during cooking 1 Open or loose wiring of primary interloc...

Page 17: ...iews MM52 MM01 MM22 MM16 MM07 MM13 MM29 MM30 MM31 MM14 MM18 MM19 MM20 MM27 MM28 MM06 MM03 MM08 MM10 MM09 MB01 MB05 MB03 MB08 MB04 MB02 MC01 MC05 MC04 MC02 MC03 MC07 MC06 MD01 MD02 MD10 MD07 MD04 MD12 MD06 MD11 MD05 MD03 MC13 MM17 MM71 MM55 MM05 MM32 ...

Page 18: ...3 MW5896W PP TB53 78g WHT 1 MM10 4713 001102 LAMP INCANDESCENT 125V 25W TRP 25x62mm 1 CV AIR MM13 DE66 90113A LEVER DOOR PP TB53 GH41 T2 5 12g NTR 3RD W 1 MM14 DE26 00088B TRANS H V SHV U1040B 120V 60HZ 2220V 3 35V H 1 MM16 DE71 60449A COVER MGT 3RD 1 3 MW7896W PP TB53 25g 110 5x115 1 MM17 DE47 20173A THERMOSTAT PW 2N 90 60 30 187Y 250V7 5A 9 1 MM18 DE74 20002C TRAY COOKING GLASS T6 1 MM19 DE92 90...

Page 19: ...S MW144 1 MC13 DE94 00444A ASSY CONTROL PANEL MG1340WA XAX P WHT K DESIGN 1 MD01 ASSY DOOR MW1440WA XAX P WHT W9501 1 S N A MD02 DE64 00152G DOOR A AKM4000 ABS HR0370D T2 0 1 4 WHT WHIRLPOO 1 MD03 DE67 00002B SCREEN DOOR ACRYL T1 5 W173 6 L373 5 CLEAR MW7896W01 1 MD04 DE94 00019C ASSY DOOR E MW7897G BLK COATING 3RD 1 3 1 MD05 DE01 00113A FILM DOOR 1 MD06 DE64 40010B DOOR C PP TB53 T1 5 BLK 1 2CU F...

Page 20: ...4X12 TOOTHED 1 CV AIR DE60 10082H SCREW A 2S 4X12 TOOTHED 1 MGT B TCO DE60 10082H SCREW A 2S 4X12 TOOTHED 2 MO FAN DE60 10082H SCREW A 2S 4X12 TOOTHED 1 P C EA DE60 10082H SCREW A 2S 4X12 TOOTHED 5 PN OUT DE60 10082H SCREW A 2S 4X12 TOOTHED 1 S M EA DE60 10088A SCREW TAP PH FEFZY PLAIN PH M3 L8 1 MGT TCO DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4X8 WT 2 M DRIV DE60 10088A SCREW TAP...

Page 21: ... 8 P C B Diagrams 8 1 P C B Diagrams ...

Page 22: ...5MIL PLASTIC 1 IC02 1405 000001 VARISTOR 470V 1250A 14x7 5mm TP 1 ZNR1 2007 000033 R CHIP 0OHM 5 1 8W DA TP 3216 3 J11 12 13 2007 000282 R CHIP 100KOHM 5 1 10W DA TP 2012 2 R27 28 2007 000300 R CHIP 10KOHM 5 1 10W DA TP 2012 4 R07 09 13 2007 000346 R CHIP 120OHM 5 1 8W DA TP 3216 8 R19 26 2007 000468 R CHIP 1KOHM 5 1 10W DA TP 2012 5 R01 03 05 10 2007 000572 R CHIP 220OHM 5 1 10W DA TP 2012 1 R12 ...

Page 23: ...EADS OR AS NOTED ON SPECIAL LEADS POWER MUST BE DISCONNECTED BEFORE SERVICING THIS APPLIANCE BLK BLU BLK RED RED RED RED BLK BLK RED WHT BLU ORG ORG BLU BLK MAGNETRON HIGH VOLTAGE DIODE TO CHASSIS FA F HIGH VOLTAGE TRANSFORMER POWER RELAY DOOR SENSING SWITCH BOTTOM MONITOR SWITCH CENTER BLK RED SECONDARY SWITCH TOP HIGH VOLTAGE CAPACITOR RED ORG WHT SYMBOL COLOR BLU BLK RED ORANGE WHITE BLUE BLACK...

Page 24: ...January 2003 Printed in Korea ...