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LG LRMM1430SB User's Manual

1. 35 OVEN INTERIOR PARTS 36 BASE PLATE PARTS REPLACEMENT PARTS LIST FOR MODEL LRMM1430SB 65006B 5006W3A016B W107 1TTL0402416 WSZ002 1SBF0402418 WSZ085 4B70188C CAP BASE PLATE SCREW TAPPING TRUSS HEAD SCREW TAP TITE S BINDING HEAD SCREW DRAWING Na PART NO DESCRIPTION SVC ALTER 01 3828W5A3194 MANUAL OWNERS R 02 3828W553066 MANUAL SERVICE R 10 3890W3W376B BOX WHITE R 13213A 3213W0A008B DOOR FRAME ASSEMBLY R 135364 3536W1A002A SEAL TAPE S 13552A 3552W0A009A CHOKE COVER R 13581A 3581W0A077B DOOR ASSEMBLY R 13806F 3806W1A062A DECO FRONT R 14026A 4026W1A025A LATCH R 14970A 4970WRAO01C SPRING R 15006A 5006W1A005A CAP CHOKE COVER R 23506A 3506W1A443B KEY MEMBRANE R 268711 6871W1S144C PWB PCB ASSEMBLY SUB R 268712 6871W1S145A PWB PCB ASSEMBLY SUB R 33052A 3052W3A015A CANOPY RESIN R 331120 3112W0U048C OUT CASE U BENDING R 333906 3390W1A017A TRAY GLASS R 35264A 4974W0A006A GUIDE AIR R 35889A 5889W1A003A ROTATING RING ASSEMBLY R 365495 6549W1S015A MOTOR CIRC SYNCHRONOUS R 6549W1S011A 43500A 3500W0A002A BOARD LATCH R 435014 3501W1A030A BOARD ASSEMBLY LATCH R 466001 6600W1K004C SWITCH MICRO R 3B73362F 466003 6600W1K004B SWITCH MICRO R 3B73361E 50FZZA 3B74133K FUSE DRAWING R 3B74133H 549748 4974W1A014A GUIDE SUCTION R
2. 85 5 HH El 1 3 4 5 6 7 INVERTER IT I 4 pre et A AAA A 120 V w il START 8 9 0 3 al a 20 pzo nrs ea x 22 AA lt 3 42 PRINTED CIRCUIT BOARD KEY PCB E nel h gt E EI und HSS E MAIN PCB 6870WIA145A ur o o Bl f vo o o o ANO o DESIGNED BY Y J PARK O 2002 06 23 1 6871W14145 P C B PARTS LIST LOC NO PART NO DESCRIPTION SPECIFICATION SVC ALTER ARI 0RZ1503G610 RESISTOR DRAWING 150KOHM 1 4W 5 3216 BULK 8 PIN R BZ1 6908W3YA01C BUZZER TFM 57 CW NINGBO EAST PIEZO 2048HZ 70D R 6908W3YA01A C01 0CK1040K948 CAPACITOR FIXED CERAMIC HIGH DIELECTRIC 0 1UF D 50V 80 20 F Y5V TA26 R C02 0CE2276K618 CAPACITOR FIXED ELECTRO 220UF SMS SG 50V 20 FL TP 5 R C03 0CE4771J618 CAPACITOR FIXED ELECTRO 470UF SM SA 35V 20 FL TP 5 R C04 0CE4756K638 CAPACITOR FIXED ELECTRO 4 7UF SMS SG 50V 20 FM5 TP 5 R
3. 2 LC I wa Remove choke cap Choke Cap Figure 8 Remove door B DOOR ASSEMBLY REMOVAL Figure 9 1 Remove out case 2 Unfasten two screws for removing deco front 3 Disconnect the lead wires from main board and pull that out from the cavity 4 Remove the choke cap very carefully with a flat blade screw driver 5 Lift up and pull out Door assembly carefully from the cavity CAUTION Be careful not to damage door seal plate with the screw driver Figure 9 C REMOVING CONTROL CIRCUIT BOARD Figure 10 1 Remove out case 2 Remove door assembly 3 Unfasten two screws 4 Lift up and pull out control panel assembly carefully from the cavity 5 Remove door frame 6 Remove the F P C connector from the terminal socket 7 Unfasten two screws which tighen the circuit board 8 Remove control circuit board from the door panel assembly 5 6 Unfasten screws Door frame Control Panel F P C Connector Figure 10 D SEPARATE CAVITY AND BASE PLATE Figure 11 1 Remove out case 2 Remove Door Assembly 3 Remove five screws at the base plate Front 3 EA Back 2 EA 4 Disconnect the lead wires from filter Disconnect all the lead wires from main board Disconnect the MGT high voltage lead wire and turn table motor lead wire 7 Lift up the cavity and disconnect the fan motor lead wire o al CAUTION BE CA
4. 54974T 4810W1A079A BRACKET SENSOR R 54980A 4B73792B SUPPORTER R 55238A 4974W1A013A GUIDE AIR R 55900A 2B72125A FAN S 56201A 6201W1A008F FILTER ASSEMBLY CIRC R 56324A 6324W1A002B MAGNETRON R 56411A 6411W1A027A POWER CORD ASSEMBLY R 6411W1A027B 56501A 6501W1A006E SENSOR ASSEMBLY R 56549F 6549W1F008B MOTOR CIRC FAN R 6549W1F005B 56851H 6850W1A001B CABLE HIGH VOLTAGE R 568711 6871W1S019A PWB PCB ASSEMBLY SUB R 568771 6877W1A434A HARNESS R 568772 6631W3A003Q HARNESS R 56912B 6912W3B002Q LAMP DRAWING R 6912W3B002G 56930V 6930W1A001J THERMOSTAT R 6930W1A003A 63302A 3302W0A041A BASE PLATE R 647781 4778W1A002A LEG R R R R R R WSZ185 1SZZW2A002A SCREW DRAWING 38 R S SERVICE PARTS c PART NO DESCRIPTION SVC ALTER WTP002 1TPLO302018 SCREW TAPPING PAN HEAD R WTP013 1TPL0402418 SCREW TAPPING PAN HEAD R WTTO21 1TTL0402418 SCREW TAPPING TRUSS HEAD R WTTO28 1TTL0402818 SCREW TAPPING TRUSS HEAD R WTT034 11110403418 SCREW TAPPING TRUSS HEAD R 39 R S SERVICE PARTS FOR MODEL LRMM1430SW LOC NO PART NO DESCRIPTION SVC ALTER 01 3828W5A3340 MANUAL OWNERS R 02 3828W553192 MANUAL SERVICE R 10 3890W3W377A BOX WHITE R 13213A 3213W0A008C DOOR FRAME ASSEMBLY R 13352A 3352W1A144A FRONT SCREEN S 13536A 3536W1A002A SEAL TAPE S 13552A 3552W0A009A CHOKE COVER R 13581A 3581W0A077E DOOR ASSEMBLY R 13720D 3720W
5. G website http www lgservice com MICROWAVE OVEN MODEL LRMM14305W LRMM1430SB CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CAUTION WARNING TO SERVICE TECHNICIANS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY 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 Before turning on microwave 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 adjusted by procedures described in this manual before the oven is released to the owner e A Microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner Proper operation of the microwave ovens requires that the magnetron be assembled to the wave guide
6. S BINDING HEAD R WSZ085 4B70188C SCREW DRAWING R 40 R S SERVICE PARTS LOC NO PART NO DESCRIPTION SVC ALTER WTP002 1TPLO302018 SCREW TAPPING PAN HEAD R WTP013 1TPL0402418 SCREW TAPPING PAN HEAD R WTT021 1TTL0402418 SCREW TAPPING TRUSS HEAD R WTT022 1TTL0402422 SCREW TAPPING TRUSS HEAD R WTT028 1TTL0402818 SCREW TAPPING TRUSS HEAD R WTT034 1TTL0403418 SCREW TAPPING TRUSS HEAD R 41 R S SERVICE PARTS SCHEMATIC DIAGRAM OF P C B i N 7pin Connectorgl AC INPUT 1 TMP87CM14 ren ee o td 3 3332332323333223313J333323323 F E E FFFFFFE zu 8 D9 D92 093 094 095 096 y 1N4148 1N4148 Y 1N4148 104148 104148 Y 104148 Y 104148 MONITOR SWITCH Wu ws we Be 5 4 KITCHEN Pe 1 amp x Lal 3 CLOCK MORE LESS 7 be hl o E POTATO erst no RICE TT w mola 7 I AD A Ap Q IEMADE FAST MAGNETRON 2 SOFTEN MELT y Perros want 192 Ar 2
7. TP TO92 50V 150MA R 020 0TR181509AB TRANSISTOR BIPOLARS KTC1815 Y KTC3198Y KEC TP TO92 50V 150M R Q30 0TR105009AD TRANSISTOR BIPOLARS KRA105M KEC TP TO92 50V 100MA R OTRFC90002A 036 0TR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A Q37 0TR181509AB TRANSISTOR BIPOLARS KTC1815 Y KTC3198Y KEC TP TO92 50V 150M R Q38 0TR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 050 0TR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A Q51 OTR107009AD TRANSISTOR BIPOLARS KRC 107M KEC TP TO92M 50V 100MA R 071 OTR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 072 OTR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 073 OTR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 074 OTR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 075 OTR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 098 0TR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A 099 OTR107009AE TRANSISTOR BIPOLARS KRA107M KEC TP TO92M 50V 100MA R OTRFC90021A R01 0RD1001F608 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 TA26 R R02 ORD1501F608 RESISTOR FIXED CARBON FILM 1 5K OHM 1 6 W 5 TA26 R R03 ORD4701F608 RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 TA26 R R04 ORD1001F608 RESISTOR FIXED CARBON FI
8. empty Operating the oven with no load may shorten the life of the magnetron Whenever cooking dry foods dried fish bread etc or a small amount of food be sure to put a glass of water into the cooking compartment The turntable tray may become hot after operating be careful when touching it Aluminum foil should be avoided because it will disrupt cooking and may cause arcing However small pieces may be used to cover some parts of food to slow the cooking Any aluminum foil used should never be closer than 2 5 cm to any side wall of the oven 4 TRIAL OPERATION After installation the following sequences and results should be checked carefully A B Put a container filled with water about 1 liter into the oven and close the door tightly Touch the STOP CLEAR and the COOK TIME keys 0 appears in the display window Set cooking time for 10 minutes by touching 1 and then 0 three times 10 00 appears in the display window Touch the START key Make sure the cavity light comes on The unit will begin cooking and the display window will show the time counting down by seconds After about 5 minutes make sure the primary interlock switch the secondary interlock switch and the interlock monitor and oven lamp switch operate properly by opening and closing the door several times Touch the START key each time the door is closed Continue operating the unit Two short and a long b
9. mm adjustment of the latch board may not be necessary Go to Steps 5 and 6 to check the sequence of the switches NOTE To correct sequence of the Primary Interlock Switch Secondary Interlock Switch and the Interlock Monitor Switch is very important If any gap is larger than 1 64 0 5 mm you will need to adjust the latch board U L Go to step 3 and follow all steps in order ADJUST THE LATCH AND SWITCH CLOSINGS 3 Loosen the screw holding the plastic latch board as shown 4 With the oven door closed tightly move the latch board upward toward the top of the oven and or away from the door latch until the gaps are less than 1 64 0 5 mm Hold the latch board tightly in this position until you check the sequence of the switches in steps 5 and 6 TEST THE LATCH AND SWITCH SEQUENCE 5 Open the oven door slowly Watch the door latch the Primary Switch Release Rod and Lever on the switches to make sure they are zero to the body of the switches in the following sequence Primary Interlock Switch Secondary Interlock Switch Interlock Monitor Switch Adjust the latch board until the switches operate in this sequence See Steps 3 and 4 6 Close the oven door slowly and be sure it is tightly closed Watch the three switches to make sure they are zero to the body of the switches in the following sequence Interlock Monitor Switch Primary Interlock Switch Secondary Interlock Switch NOTE The Interlock M
10. not light up or they continue to light up or segments light when they should not Wrong figures appear The figures of all digits flicker Some of the indicators do no light up The clock does not keep time properly 6 7 ID I I a NOTE MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON 25 C 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 Inverter 3 When checking the continuity of the switches or of the inverter 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 4 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 Microwave oven CAUSE does not work Inserting many plugs into one outlet and using them at the same time blown fuse or breaker REMEDY Avoid using othe
11. pad is touched CONDITION CHECK RESULT CAUSE REMEDY 1 Setting time Check continuity No continuity 22 2 dura i does not count of secondary secondary switch secondary switch down when switch with touching START door closed L Continuity pad Check the con T Defective Power Replace Power nection between Continuity PCB assembly PCB assembly CN1 connector and PCB No continuity Loose connection gt Comed Mem assembly tightly 2 Fan motor or Check fan motor gt Abnormal Defective fan motor gt Replace fan motor oven lamp do not turn Check oven lamp x Abnormal Defective oven lamp Replace oven lamp Normal TROUBLE 4 Oven seems to be operating but little heat is produced in oven load CONDITION CHECK RESULT CAUSE REMEDY Lower than 90 of Decrease in power Suggest customer Output is gt gt Check the rating voltage source voltage contact local ieee with load electric power L Normal utility co or qualified electrician Defective Replace 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 conditi
12. the amount of the Category 5 gt Repeat steps 2 5 to set 2nd cooking stage 11 6 MELT 1 Touch STOP CLEAR 2 Touch MELT Four different melt menus are provided 3 Select Menu 1 to 4 See cooking guide 4 Enter the amount of the Category 7 AUTO DEFROST 1 Touch STOP CLEAR 2 Touch AUTO DEFROST Three different defrosting category are provided MEAT POULTRY FISH BREAD 3 Enter the weight of your food 4 Touch START 5 At beeping turn food over by following the instructions in the manual 6 After turning food over touch START to resume defrosting 8 Q DEFROST 1 Touch STOP CLEAR 2 Touch Q DEFROST 9 KITCHEN TIMER 1 Touch STOP CLEAR 2 Touch KITCHEN TIMER 3 Touch correct numbers for time 4 Touch START 8 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE A CAUTIONS 1 Be sure to check a microwave emission prior to servicing the oven if the oven is operative prior to servicing The service personnel should inform the manufacturer importer or assembler of any certified oven unit found to have a microwave emission level in excess of 5mW cm sq and should repair any unit found to have excessive emission levels at no cost to the owner and should ascertain the cause of the excessive leakage The service personnel should instruct the owner not to use the unit until the oven has been brought into compliance If the oven operates with the door open the ser
13. this pad to soften ice cream cream cheese butter or frozen juice Children s Lunch Children s Lunch has 3 food categories of preset cooking time and power level Fast Breakfast Fast Breakfast has 3 food categories of preset cooking time and power level Melt Touch this pad to melt chocolate cheese butter or marshmallows Auto Defrost This pad is an accurate defrosting method for meat poultry fish and bread 10 11 12 13 14 15 16 17 18 19 Q Defrost Touch this pad to defrost foods quickly More Less Touch these pads to adjust cooking time in 10 second increments Cook time Touch this pad to set a cooking time Power Touch this pad to set a cooking power Clock Touch this pad to enter the time of day Kitchen Timer Touch this pad to use your microwave oven as a kitchen timer Number pads Touch Number pads to enter cooking time Power level quantities or weights Stop Clear Touch this pad to stop the oven or clear entries Also used to turn Child Lock on and off Ez ON You can extend cooking time in multiples of 30 seconds by repeatedly touching this pad during cooking Start Touch this pad to start the oven B PANEL INSTRUCTIONS Figure 5 The entire operation is done by simple touch control pads 1 Display Window Numbers and letters explained in Figure 5 are shown in the display window Vacuum Fluorescent Tube a The Time in four digits 12 hour indica
14. 0D308A PANEL DOOR R 13806F 3806W1A062B DECO FRONT R 14026A 4026W1A025A LATCH R 14970A 4970WRA001C SPRING R 15006A 5006W1A005A CAP CHOKE COVER R 23506A 3506W1A443C KEY MEMBRANE R 268711 6871W1S144C PWB PCB ASSEMBLY SUB R 268712 6871W1S145A PWB PCB ASSEMBLY SUB R 33052A 3052W3A015A CANOPY RESIN R 33112U 3112W0U048D OUT CASE U BENDING R 33390G 3390W1A017A TRAY GLASS R 35264A 4974W0A006A GUIDE AIR R 35889A 5889W1A003A ROTATING RING ASSEMBLY R 365495 6549W1S015A MOTOR CIRC SYNCHRONOUS R 6549W1S011A 43500A 3500W0A002A BOARD LATCH R 43501A 3501W1A030A BOARD ASSEMBLY LATCH R 466001 6600W1K004C SWITCH MICRO R 3B73362F 466003 6600W1K004B SWITCH MICRO R 3B73361E 50FZZA 3B74133K FUSE DRAWING R 3B74133H 549748 4974W1A014A GUIDE SUCTION R 54974T 4810W1A079A BRACKET SENSOR R 54980A 4B73792B SUPPORTER R 55238A 4974W1A013A GUIDE AIR R 55900A 2B72125A FAN S 56201A 6201W1A010C FILTER ASSEMBLY CIRC R 56324A 6324W1A005A MAGNETRON R 56411A 6411W2A002R POWER CORD ASSEMBLY B 56501A 6501W1A006E SENSOR ASSEMBLY R 56549F 6549W1F008B MOTOR CIRC FAN R 6549W1F005B 56851H 6850W1A001F CABLE HIGH VOLTAGE R 568711 6871W1S019A PWB PCB ASSEMBLY SUB R 568771 6877W1A481A HARNESS R 568772 6631W3A003Q HARNESS R 56912B 6912W3B002Q LAMP DRAWING R 6912W3B002G 56930V 6930W1A001J THERMOSTAT R 6930W1A003A 63302A 3302W0A041A BASE PLATE R 647781 4778W1A002A LEG R 65006B 5006W3A016B CAP BASE PLATE R WSZ002 1SBF0402418 SCREW TAP TITE
15. 26 DO34 60V 0 5A 0 R D30 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D32 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D38 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D60 0DD414809AA DIODE SWITCHING 1N4148 ROHM TP26 DO35 100V 450MA 2A 3NS R 44 R SERVICE PARTS LOC NO PART NO DESCRIPTION SPECIFICATION SVC ALTER D61 0DD414809AA DIODE SWITCHING 1N4148 ROHM 26 DO35 100V 450 2A 3NS R D90 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D91 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D92 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D93 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D94 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R 095 000414809 DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D96 0DD414809AB DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R DP1 6302W5A023A DIGITRON 10 MT 127GN 9 MS 2142KSZ SEARS 2 LINE 3 R IC1 0ISS791500A IC LINEAR KA7915 FAIRCHILD 3PIN TO220 BK REGULARTO R 0IKE791500A 6010W2P043P TRANSFORMER POWER 120V 60HZ DC 12V AC 3 4V LGETA LEADER R 6010W2P043A 001 OTR101509AB TRANSISTOR BIPOLARS A1015 KTA12660 KEC TP TO92 50V 150MA R 002 OTR101509AB TRANSISTOR BIPOLARS A1015 KTA12660 KEC
16. 6 R C80 0CK2210K518 CAPACITOR FIXED CERAMIC H C 220PF D 50V 10 B Y5P TA26 R C81 0CK2210K518 CAPACITOR FIXED CERAMIC H C 220PF D 50V 10 B Y5P TA26 R C82 0CK2210K518 CAPACITOR FIXED CERAMIC H 220PF D 50V 10 B Y5P TA26 R C83 0CK2210K518 CAPACITOR FIXED CERAMIC H 220PF D 50V 10 B Y5P TA26 R C84 0CK2210K518 CAPACITOR FIXED CERAMIC H 220PF D 50V 10 B Y5P TA26 R CN5 6877W1A437A HARNESS CONTROLLER LGECW SEARS MS 1442KCSV R CN6 6877W1A437A HARNESS CONTROLLER LGECW SEARS MS 1442KCSV R CR1 6212W5M002A RESONATOR CERAMIC CSTS0400 MURATA 4MHZ 0 5 TP 15PF R CU4 4850W4C001A CUSHION 3 5T 15W 40L RUBBER BLACK R 1 0DD400209AA DIODE RECTIFIERS 1N4002 PYUNG CHANG TP26 DO41 100V 1A 30 R 002 0DD400209AA DIODE RECTIFIERS 1N4002 PYUNG CHANG TP26 DO41 100V 1A 30 R 0DD400209AA DIODE RECTIFIERS 1N4002 PYUNG CHANG TP26 DO41 100V 1A 30 R 005 000414809 DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R 010 0DD400209AA DIODE RECTIFIERS 1N4002 PYUNG CHANG TP26 DO41 100V 1A 30 R 011 000414809 DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R D12 0DD414809AA DIODE SWITCHING 1N4148 ROHM TP26 DO35 100V 450MA 2A 3NS R 015 000400209 DIODE RECTIFIERS 1N4002 PYUNG CHANG TP26 DO41 100V 1A 30 R 020 0DD414809AA DIODE SWITCHING 1N4148 ROHM TP26 DO35 100V 450MA 2A 3NS R 025 000414809 DIODE 1N4148M PYUNG CHANG TP26 DO34 60V 0 5A 0 R 026 000414809 DIODE 1N4148M PYUNG CHANG TP
17. C05 0CK2230K948 CAPACITOR FIXED CERA 22NF D 50V 80 20 F YSV TA26 R C06 0CK1040K948 CAPACITOR FIXED CERA 0 1UF D 50V 80 20 F Y5V TA26 R C08 0CE1076D638 CAPACITOR FIXED ELECTRO 100UF SMS SG 10V 20 FM5 TP 5 R C09 0CK2230K948 CAPACITOR FIXED CERA 22NF D 50V 80 20 F YSV TA26 R C10 0CK1040K948 CAPACITOR FIXED CERA 0 1UF D 50V 80 20 F Y5V TA26 R C11 0CE1076K638 CAPACITOR FIXED ELECTRO 100UF SMS SG 50V 2095 FM5 TP 5 R C14 0CK1040K948 CAPACITOR FIXED CERA 0 1UF D 50V 80 20 F Y5V TA26 R C15 0CE1076K638 CAPACITOR FIXED ELECTRO 100UF SMS SG 50V 20 FM5 TP 5 R C16 0CE1066K638 CAPACITOR FIXED ELECTRO 10UF SMS SG HR 50V 20 FM5 TP 5 R C20 0CK2230K948 CAPACITOR FIXED CERAMI 22NF D 50V 80 20 F YSV TA26 R C21 0CK2230K948 CAPACITOR FIXED CERAMI 22NF D 50V 80 20 F YSV TA26 R C25 0CK2230K948 CAPACITOR FIXED CERAMI 22NF D 50V 80 20 F YSV TA26 R C45 0 1020 518 CAPACITOR FIXED CERAMI 10KPF D 50V K B TA26 R C50 0CE4766K638 CAPACITOR FIXED ELECTRO 47UF SMS SG 50V 20 FM5 TP 5 R C60 0CK2230K948 CAPACITOR FIXED CERAMI 22NF D 50V 80 20 F Y5V TA26 R C61 0CK2230K948 CAPACITOR FIXED CERAMIC H 22NF D 50V 80 20 F Y5V TA26 R C62 0CK2230K948 CAPACITOR FIXED CERAMIC H 22NF D 50V 80 20 F Y5V TA26 R C63 0CK2230K948 CAPACITOR FIXED CERAMIC H C 22NF D 50V 80 20 F Y5V TA26 R C65 0CK2230K948 CAPACITOR FIXED CERAMIC H C 22NF D 50V 80 20 F Y5V TA2
18. ENERS UZ 7 5BS PYUNG CHANG TP26 DO34 500MW 7 5 R 46 R SERVICE PARTS May 2003 P NO 3828W5S3066 Printed in Korea
19. LM 1K OHM 1 6 W 5 TA26 R R05 0RN5601F408 RESISTOR FIXED METAL FILM 5 6K OHM 1 6 W 1 TA26 R R06 ORN2702F408 RESISTOR FIXED METAL FILM 27K OHM 1 6 W 1 A26 R R07 0RD1001G608 RESISTOR FIXED CARBON FILM 1K OHM 1 4 W 5 TA26 R R10 0RD1000F608 RESISTOR FIXED CARBON FILM 100 OHM 1 6 W 5 TA26 R R100 0RD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R R101 ORD1002F608 RESISTOR FIXED CARBON FILM 10K OHM 1 6 W 5 TA26 R R103 0RD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R R104 0RD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R R11 0RD0102G608 RESISTOR FIXED CARBON FILM 10 OHM 1 4 5 TA26 R R110 ORD4701F608 RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 TA26 R R12 0RD0102G608 RESISTOR FIXED CARBON FILM 10 OHM 1 4 W 5 TA26 R R13 ORD1003F608 RESISTOR FIXED CARBON FILM 100K OHM 1 6 W 5 TA26 R R20 0RD1002G608 RESISTOR FIXED CARBON FILM 10K OHM 1 4 5 TA26 R R21 0RD1001F608 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 TA26 R R22 0RD2202F608 RESISTOR FIXED CARBON FILM 22K OHM 1 6 W 5 TA26 R R23 ORD1002F608 RESISTOR FIXED CARBON FILM 10K OHM 1 6 W 5 TA26 R R25 0RD3901G608 RESISTOR FIXED CARBON FILM 3 9K OHM 1 4 W 5 TA26 R R26 0RD1001F608 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 TA26 R 45 LOC NO PART NO DESCRIPTION SPECIFICA
20. M 2M OHM 1 6 W 5 TA26 R R80 0RD2202F608 RESISTOR FIXED CARBON FILM 22K OHM 1 6 W 5 TA26 R R81 0RD2202F608 RESISTOR FIXED CARBON FILM 22K OHM 1 6 W 5 TA26 R R82 0RD2202F608 RESISTOR FIXED CARBON FILM 22K OHM 1 6 W 5 TA26 R R83 0RD2202F608 RESISTOR FIXED CARBON FILM 22K OHM 1 6 W 5 TA26 R R84 0RD2202F608 RESISTOR FIXED CARBON FILM 22K OHM 1 6 W 5 TA26 R R90 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R91 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R92 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R93 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R94 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R95 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R96 0RD2202G608 RESISTOR FIXED CARBON FILM 22K OHM 1 4 W 5 TA26 R R98 0RD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R R99 ORD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R RY1 6920W2D010A RELAY OJ SS 112LM OEG 250VAC 3A 12VDC 1A NO VE R 6920W2D010B RY2 6920W5A012A RELAY G56 1A DT1 LG OMRON 250VAC 16A 12VDC 1A R 001 OIZZW5A191B IC DRAWING TMP87CM14N 64SDIP BK MS 1443ASV LGEUS MO 002 OIKE455800A IC LINEAR KIA4558P KEC 8DIP BK LIN OPAMP R VR1 6102W5V006A VARISTOR SVC271D 14A SAMWHA UL CSA VDE TP R ZD1 0DZ510009AE DIODE ZENERS UZ5 1BS B GRADE 2 PERCENT TOLERANCE ROHM R 202 0DZ750009AC DIODE Z
21. REFUL NOT TO DAMAGE LEAD Unfasten screws Figure 11 E AIR GUIDE REMOVAL Figure 12 G SENSOR DUCT REMOVAL Figure 13 1 Separate cavity and base plate Remove out case 2 Unfasten the screws which hold the air guide in the Unfasten the sensor duct screw 1 2 base plate 3 Disconnect sensor lead wire 4 Pull the sensor duct out 3 Unfasten the air guide from hook F POWER BOARD AND INVERTER MODULE AND Figure 13 SUCTION GUIDE Figure 12 Separate cavity and base plate Remove air guide Unfasten the screws Lift up the power board inverter module and suction guide 1 2 3 4 DO I Figure 12 16 H MAGNETRON REMOVAL 1 Disconnect the leadwire from the magnetron 2 Carefully remove the mounting screws holding the magnetron at the waveguide 3 Remove the magnetron 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 magnetron Microwave energy must be below the limit of 5 mW cm With a 275 ml water load Make sure that gasket is rigidly attached to the magnetron To prevent microwave leakage tighten the mounting screws pr
22. T NOTE DOOR IS OPEN BK BLACK 06 07 9 so BE WH WHITE CN3 20 BN BN BROWN RY2 o MH I BL BLUE RD RED To BK YL YELLOW cne pol RD SENSOR PK PINK WH ASS Y GN GREEN MICOM CONTROLLER So Figure 3 B MATRIX CIRCUIT FOR TOUCH KEY BOARD 1 13 44 S 6 CHICKEN KITCHEN EZ ON CHOICES N C TIMER CLOCK MORE LESS 8 o VEGE AUTO ee REHEAT POTATO fo N C RICE POPCORN s PAE JAS mm uA ID CHILDREN S FROZEN LUNCH ENTREE SOFTEN MELT 101 11 COOK STOP TIME CLEAR START 12 Figure 4 IN 7 OPERATING PROCEDURES A CONTROL PANEL 9 o 09 SENSOR TOUCH DEFROST POPCORN POTATO RICE CHICKEN AUTO NE E cook crok 1 12131415 2195 5 START PEREAT WE 5785 Clinch forener MELT Ll H power 67189 O smartwave O O 63 Figure 5 Display The Display includes a clock and indicators that tell you time of day cooking time settings and cooking functions selected Sensor Touch This pad allows you to cook most of your favorite foods without having to select cooking times and power levels Homemade Bakery Homemade bakery has 3 food categories of preset cooking time and power level Chicken Choices Chicken Choices has 4 food categories of preset cooking time and power level Soften Touch
23. TION SVC ALTER R38 0RD5601G608 RESISTOR FIXED CARBON FILM 5 6K OHM 1 4 W 5 TA26 R R39 ORD1002F608 RESISTOR FIXED CARBON FILM 10K OHM 1 6 W 5 TA26 R R45 0RD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R R46 ORD3302F608 RESISTOR FIXED CARBON FILM 33K OHM 1 6 W 5 TA26 R R47 0RD1001F608 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 TA26 R R50 0RD1001G608 RESISTOR FIXED CARBON FILM 1K OHM 1 4 W 5 TA26 R R52 0RD5600F608 RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 TA26 R R55 0RD1004F608 RESISTOR FIXED CARBON FILM 1M OHM 1 6 W 5 TA26 R R60 ORD4702F608 RESISTOR FIXED CARBON FILM 47K OHM 1 6 W 5 TA26 R R61 0RD2701G608 RESISTOR FIXED CARBON FILM 2 7K OHM 1 4 W 5 TA26 R R62 ORN2003F408 RESISTOR FIXED METAL FILM 200K OHM 1 6 W 1 TA26 R R63 0RN1001F408 RESISTOR FIXED METAL FILM 1K OHM 1 6 W 1 TA26 R R67 ORN1072F408 RESISTOR FIXED METAL FILM 10 7K OHM 1 6 W 1 TA26 R R68 ORN1002F408 RESISTOR FIXED METAL FILM 10K OHM 1 6 W 1 TA26 R R69 0RD6600H608 RESISTOR FIXED CARBON FILM 660 OHM 1 2 W 5 TA26 R R70 0RD6600H608 RESISTOR FIXED CARBON FILM 660 OHM 1 2 W 5 TA26 R R71 ORD1503F608 RESISTOR FIXED CARBON FILM 150K OHM 1 6 W 5 TA26 R R72 0RD2703F608 RESISTOR FIXED CARBON FILM 270K OHM 1 6 W 5 TA26 R R73 0RD5103F608 RESISTOR FIXED CARBON FILM 510K OHM 1 6 W 5 TA26 R R74 ORD1004F608 RESISTOR FIXED CARBON FILM 1M OHM 1 6 W 5 TA26 R R75 ORD2004F608 RESISTOR FIXED CARBON FIL
24. and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron Routine service safety procedures should be exercised at all times Untrained personnel should not attempt service without a thorough review of the test procedures and safety information contained in this manual FOREWORD Read this Manual carefully Failure to adhere to or observe the information in this Manual may result in exposing yourself to the Microwave Energy normally contained within the oven cavity MODEL LRMM1430SW LRMM1430SB MECHANICAL SERVICE INFORMATION TABLE OF CONTENTS 1 Adjustment Procedures iioii doe e canes S idR 3 4 2 Precautions on Installationi ei Ede ie tete e eed iaia 5 Gehneral Preca tionS In Use ee oe aee dA 5 A DrlalOperation e ott etu eet E 5 5 Features and SpecifICations i tr te ene en ads 5 6 6 Overall Circuit frd ee a 7 8 Operating Procedures Suan tose event ce ee 9 11 8 Procedure for Measuring Microwave Energy Leakage i 12 13 9 Disassembly Instructions aa A ke ii ken 14 18 10 Interlock Continuity Test et ete 19 11 Test and Checkout Procedures and Troubleshooting A Test Procedures TR 20 22 B C
25. at its maximum output 5 Measure the microwave radiation using and electromagnetic radiation monitor by holding the probe perpendicular to the surface being measured See Figure 7 Move probe along shaded area Probe scanning speed less than 2 5 cm sec 4 Figure 7 C MEASUREMENT WITH THE OUT CASE REMOVED 1 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 Around the magnetron The waveguide WARNING AVOID CONTACTING ANY HIGH VOLTAGE PARTS D MEASUREMENT WITH A FULLY ASSEMBLED OVEN 1 After all components including the outer panels are fully assembled measure for microwave energy leakage around the door viewing window the exhaust opening and air inlet openings 2 Microwave energy leakage must not exceed the values prescribed below NOTES Leakage with the outer panels removed less than 5mW 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 1 mW cm Sq E NOTE WHEN MEASURING 1 Do not exceed meter full scale deflection 2 The test probe must be removed no faster than 1 inch sec 2 5cm sec along the shaded area otherwise a false reading may result The test pro
26. be must be held with the grip portion of the handle A false reading may result if the operator s hand is between the handle and the probe When testing near a corner of the door keep the probe perpendicular to the surface making sure the probe horizontally along the oven surface this may possibly cause probe damage 3 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 Should the microwave energy leakage not be more than 1mW cm sq after determining that all parts are in good condition functioning properly and genuine replacement parts which are listed in this manual have been used At least once a year have the electromagnetic energy leakage monitor checked for calibration by its manufacturer 13 G POWER OUTPUT MEASUREMENT Be sure oven cavity is clean and cool not used recently 1 Fill the test beaker with 59 15 C 75 F 24 C 1 liter tap water 2 Stir the water in the beaker with thermometer F or C and measure temperature as T1 3 Place the beaker on the center of turntable 4 Set for one 1 minute b When the heating is finished stir the water again with thermometer and measure the temperature of water as T2 6 Subtract T1 from T2 this will give you the temperature rise 7 The m
27. eep sound signal is heard when the time is up The unit will shut off automatically Confirm the water is hot Finally measure the output power according to POWER OUTPUT MEASUREMENT on page 13 FEATURES AND SPECIFICATIONS The safety systems incorporated in this model are 1 Primary interlock switch 2 Secondary interlock switch 3 Interlock monitor switch 4 Choke system 5 Oven cavity thermostat Note This thermostat located on the oven cavity will open and stop the unit from operation only if a high temperature is reached such as a fire created by overcooking food D IO I a Any one of 10 power output levels ranging OW to 1200W can be selected by the touch control and electronic computer system Cooking time can be displayed on the digital readout Three different cooking stages Include Defrost can be set The oven remembers three cooking stages and changes from one cooking stage to another This is made possible with the memory function of the microprocessor Rated Power Consumption Frequency A Power Supply Rated Current Magnetron Cooling Microwave Stirring Rectification Door Sealing Safety DEVICES e RE Tray Overall Dimensions eee Oven Cavity Size Effective Capadivo of Oven Cavity Owner s Manual amp Cooking Guide T
28. heckout Procedures iii ai iaia 23 25 C Troubleshootirige a la ai tiri in 26 30 12 Exploded Vi6w 4 dne ai a 31 37 13 Replacement Parts Eist ze ihe rete date P pee e petens 38 41 14 Schematic diagram of P C B iai er tr Ur erento bai ec ted tas 42 A Printed circ rt Board o ote 43 1537 G B Parts ishpa i lA n A 44 46 1 ADJUSTMENT PROCEDURES To avoid possible exposure to microwave energy leakage adjust the door latches and interlock switches using the following procedure ONLY AUTHORIZED SERVICE PERSONNEL SHOULD MAKE THIS ADJUSTMENT The Interlock Monitor and Primary Interlock Switch acts as the final safety switch protecting the user from microwave energy The terminals between COM and NC of the Interlock Monitor must close when the door is opened After adjusting the Interlock Monitor Switch make sure that it is correctly connected See Figures 1 a and 1 b throughout this procedure CHECK THE DOOR LATCH AND SWITCH CLOSINGS NOTE The out case of the microwave oven is removed 1 Set the microwave oven on its side so that you can see the latch board and the switches as shown in Figure 1 a 2 Close the door tightly and check gaps A and B to be sure they are no more than 1 64 0 5 mm See Figure 1 b for close up view of gaps A and B door latches If all gaps are less than 1 64 0 5
29. her there are any signs of failure due to loose wires bad crimping sign of overheating etc MAGNETRON Lead wires removed Measure the resistance Ohm meter scale Rx1 Filament terminal Normal Less than 1 ohm 2 Measure the resistance Ohm meter scale Rx1000 Filament to chassis Normal Infinite 20 COMPONENTS TEST PROCEDURE RESULTS NOTE When testing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition SENSOR 1 Disconnect sensor connector from micom computer board 2 Measure resistance terminal to terminal Select the ohm scale on the meter A NOTE MAKE SURE THE LEAD WIRES ARE IN THE CORRECT POSITION WHEN REMOVING THE LEAD WIRES FROM THE PARTS BE SURE TO GRASP THE CONNECTOR NOT THE WIRES Normal approximately BK RD 5 2 Kohms RD WH 2 1 Kohms BK WH 2 1 Kohms Abnormal Infinite or several Sensor cooking condition 1 Oven should be plugged in at least 5 minutes before sensor cooking 2 Room temperature should not exceed 95 F 3 Be sure the exterior of the cooking container and the interior of the oven are dry 4 The oven will not generate microwave energy for the first 28 seconds of the sensor cooking cycle 21 COMPONENTS TEST PROCEDURE RESULTS RELAY Check for continuity of relay with an No
30. icate 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 itis necessary to do this continuity test before operating the oven RESULTS SWITCHES Lead wires removed Check for continuity of the switch with an Ohm meter open Primary Switch TON Monitor Switch Da Secondary Switch EN connected correctly NOTE After checking for the continuity of switches make sure that they are 11 TEST AND CHECKOUT PROCEDURES AND TROUBLESHOOTING 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 LEAD WIRES FROM THE INVERTER MODULE 2 ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD 1 LITER OF WATER IN CONTAINER IN THE OVEN A TEST PROCEDURES COMPONENTS TEST PROCEDURE RESULTS INVERTER Lead wires removed CN702 Heat Sink 701 High Voltage Output to Magnetron Control Signal In Out Note Do not try to repair the inverter board nor try to make any adjustments to the board Check wiring to the inverter 1 Unplug the oven s main power supply 2 Visually inspect 4 connectors on the inverter board CN701 CN702 CN703 E701 to see whet
31. icrowave power output is within specification if the temperature rise is as shown below Voltage Temperature Rise VAC under load C F 120V 13 15 23 4 27 108V 11 5 13 5 20 7 24 8 8 Power output will be influenced by line voltage of power supply Consequently correct power output must be measured within 120V AC 1 Volt while unit is operating SPECIAL TIP This oven used the button head screws Button Head Torx style 2 When you remove the screws using the tamper resistant Torx driver have a pin in head 9 DISASSEMBLY INSTRUCTIONS IMPORTANT NOTES UNIT MUST BE DISCONNECTED FROM ELECTRICAL OUTLET WHEN MAKING REPAIRS RE PLACEMENTS ADJUSTMENTS AND CONTINUITY CHECKS WAIT AT LEAST ONE MINUTE UNTIL THE HIGH VOLTAGE CAPACITOR IN THE HIGH VOLTAGE POWER SUPPLY HAS FULLY DISCHARGED THE CAPACITOR SHOULD BE DISCHARGED BY USING INSULATED WIRE I E TEST PROBE CONNECTED TO 10K OHM RESISTOR IN SERIES TO GROUND WHEN RECONNECTING THE WIRE LEADS TO ANY PART MAKE SURE THE WIRING CONNECTIONS AND LEAD COLORS ARE CORRECTLY MATCHED ACCORDING TO THE OVERALL CIRCUIT DIAGRAM ESPECIALLY SWITCHES AND HIGH VOLTAGE CIRCUIT Remove deco front A REMOVING OUT CASE Figure 8 1 2 3 4 Unfasten five screws from the rear section Unfasten two screws from the side section Push the out case back about 1 inch 3cm Lift the case from the set
32. is accepted door opened No continuity RELAY of P C B Assembly CONDITION CHECK RESULT CAUSE REMEDY Check co ntinuity LIN Malfunction of the Replace fuse UI of monitor Seminuity monitor switch primary monitor switch with switches and door closed 5265 RELAY of P C B gt No continuity Assembly Replace fuse in continuity Continuity Shorted contact at gt Replace jos of primary theprimary switch primary monitor switch with P y switches and gt Disconnect one side of the lead wires connected from Inverter Normal Defective control PCB m Replace Inverter Fuse blows again Defective Inverter gt Replace control PCB NOTE All these switches must be replaced at the same time Refer to page 18 19 2 Fuse does not blow cord Check continuity No continuity Defective L Replace of thermostat thermostat thermostat Continuity gt Check continuity No continuity Defective power Replace power of power supply supply cord supply cord 28 TROUBLE 3 Display shows all figures set but oven does not start cooking while desired program times are set and START
33. mer 13 POWER Key Used to select cooking power level 14 Ez ON Key It will add 30 seconds up to 3 minutes 30 seconds after 3 minutes 30 seconds every touch will add 1 minute up to 99 minutes 59 seconds 15 START Key Touch the START key after setting the desired cooking times etc Also touch the START key to resume cooking after the cooking is temporarily stopped by opening the door The key will not function unless the door is closed 16 Soften Used to soften ice cream cream cheese butter or frozen juice 17 Melt Used to melt chocolate cheese butter or marshmallows 18 More Less Used to adjust cooking time in 10 second increments C EASY USE CHART 1 CLOCK 1 Touch STOP CLEAR 2 Touch CLOCK 3 Touch numbers for correct time of day 4 Touch CLOCK 2 HI POWER COOKING 1 Touch STOP CLEAR 2 Touch COOK TIME 3 Touch numbers for desired cooking time 4 Touch START 3 MULTI STAGE COOKING Touch STOP CLEAR Touch COOK TIME Touch numbers for cooking time Touch POWER Touch number for cooking power level O O Touch START 4 CHILD LOCK To set 1 Touch STOP CLEAR 2 Hold STOP CLEAR more than 2 seconds To cancel 1 Touch STOP CLEAR 2 Hold STOP CLEAR more than 2 seconds SOFTEN 1 Touch STOP CLEAR 2 Touch SOFTEN Four different soften menus are provided 3 Select Menu 1 to 4 See cooking guide 4 Enter
34. on 29 TROUBLE 5 No microwave oscillation even though oven lamp and fan motor run Display operates properly CONDITION CHECK RESULT CAUSE REMEDY No microwave Disconnect the No continuity Defective PCB Replace PCB oscillation wire leads from assembly assembly relay and check continuity of m Replace Inverter relay Operate TO PU and Magnetron the unit NOTE Make sure the wire leads correct position When Removing the lead wires 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 gt Abnormal Defective PCB 252 Replace when you set lower lead wires from assembly assembly power level relay and check continuity relay Operate the unit 30 EXPLODED VIEW INTRODUCTION OVEN CAVITY PARTS BASE PLATE PARTS CONTROL PANEL PARTS LATCH BOARD PARTS DOOR PARTS DOOR PARTS mem 7 CONTROLLER PARTS OVEN CAVITY PARTS Model LRMM 1430SW Model LRMM 1430SB 34 LATCH BOARD PARTS
35. onitor Switch is an added safety check on the Primary and Secondary Interlock Switches If the Primary and Secondary Interlock Switches allow the oven to operate with the door open the Monitor Switch will blow the fuse 7 When you achieve the proper sequence of switches in Steps 5 and 6 tighten the latch board screws at that point TEST THE MICROWAVE ENERGY LEAKAGE 8 Using a survey meter make sure the microwave energy is below 5 mW em sq LATCH BOARD SECONDARY INTERLOCK SWITCH DOOR LATCH MONITOR INTERLOCK SWITCH PRIMARY INTERLOCK SWITCH Figure 1 a LATCH B ose LATCH BOARD A 0 1 64 Figure 1 b 2 A PRECAUTIONS ON INSTALLATION Figure 2 Plug the power supply cord into a 120 V AC 60 Hz single phase power source with a capacity of at least 20 amperes Since the unit weights about 38 Ibs be sure to place it on a sturdy and flat surface Avoid placing the unit in a location where there is direct heat or splashing water Place the unit as far away as possible from TV radio etc to prevent interference CAUTION This unit is equipped with a 3 prong plug for your safety If the wall outlet is a grounded 3 hole type the unit will be grounded automatically Properly Polarized and Grounded Outlet Three Pronged Grounding Plug Figure 2 3 GENERAL PRECAUTIONS IN USE A Never operate the unit when it is
36. operly making sure there is no gap between the waveguide and the magnetron Magnetron Magnetron Gasket Waveguide Bracket Dome Waveguide Figure 14 17 I REMOVING THE TURNTABLE MOTOR 1 Remove the turntable and turntable roller rest 2 Lay the unit down on its back 3 Remove the turntable motor cover The turntable base cover is easily removed by pinching the four parts with a wire cutting 4 Disconnect the leadwire from the turntable motor terminals 5 Remove the screw securing the turntable motor to the oven cavity ASSEMBLY 6 After repairing the motor rotate the removed turntable motor cover 7 Fit the turntable motor cover s projecting part to the base plate slit NOTE 1 Remove the lead wires from the turntable motor VERY CAREFULLY 2 Be sure to grasp the connector not the wires when removing 4 Turntable Motor Figure 15 J FAN MOTOR ASSEMBLY REMOVAL 1 Separate cavity and base plate 2 Remove air and suction guide 8 Remove the two screws holding the fan motor ASSEMBLY to the suction guide ASSEMBLY 4 Disconnect the wires and unfasten the screws 5 Pull out the Fan motor from the suction guide Fan Motor ASS Y Suction Figure 16 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 i
37. 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 lead from the primary switch Connect the ohmmeter leads to the common COM and normally open NO 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 only with the same type of switch COMPONENTS TEST PROCEDURE B SECONDARY INTERLOCK SWITCH TEST Disconnect the wire lead from the secondary switch Connect the ohmmeter leads to the common COM and normally open NO terminals of the switch The meter should indicate a open circuit in the door open condition When the door is closed meter should indicate an closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor switch Connect the ohmmeter leads to the common COM and normally closed NC terminals of the switch The meter should indicate closed circuit in the door open condition When the door is closed meter should ind
38. ot 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 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 Each indicator light does not turn on after setting cooking cycle Display time of day does not reappear when cooking is finished programming when touching other pads 5 Display is fixed at some figure and can not accept any input 27 CONDITION CHECK RESULT CAUSE REMEDY 1 No input can be Check the conn Continuit Defective PCB Replace PCB programmed ection between y assembly assembly membrane key assembly and m Loose Connect them PCB assembly connection tightly 2 Some inputs Replace key Everything works Defective key Replace key cannot be membrane as specified membrane membrane programmed assembly and assembly assembly check operation 3 Display shows a Still have trouble Defective PCB Replace PCB number or figure assembly assembly different from one touched 4 Random TROUBLE 2 Oven does not operate at all Display window does not display any figures and no input
39. r electrical appliances when you use the microwave oven Microwave oven plug is not inserted tightly Insert microwave oven plug securely Output power is too low Low AC input voltage Use the microwave oven at adequate line voltage Food temperature is too low This may not be a defect It is possible that the food should be cooked for a longer time period Sparks occur Uneven cooking Using metallic ware and allowing it to touch the oven wall Do not use metallic ware for cooking except where noted in the cooking guide Ceramic ware trimmed in gold or silver powder is used Do not use any type of cookware with metallic trimming Inconsistent intensity of microwave by their characteristics 26 1 Use plastic wrap or lid 2 Stir once or twice while cooking soup cocoa or milk etc TROUBLE 1 The following visual conditions indicate a probable defective control circuit gt 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 n
40. re correctly connected Check for microwave energy leakage according to 1 ADJUSTMENT PROCEDURES on page 3 when the primary interlock secondary interlock switches and or the interlock monitor switches are adjusted or replaced 23 2 CHECKOUT PROCEDURES FOR RELAY FAN motor and oven lamp turn on without touching START key when the door is closed PROBLEM A G GOOD Remove the mate connector of I O CON from the circuit board does the unit still operate Replace the circuit board FAN motor and oven lamp turn on closed and START key is touched PROBLEM B When the door is E GOOD Check the interlock switches pe Replace the micro switches Defective RELAY or poor connection of relay Replace RELAY or correct the connection 24 3 CHECKOUT PROCEDURES FOR CIRCUIT BOARD The following symptoms indicate a defective circuit board 1 Check the input current If the input current is more than 20A check the magnetron and wiring If the input current is less than 0 5 A there is no input to the inverter 2 The start function fails to operate but the interlock switches the door sensing and the relay check good 3 The unit with a normal relay continuously operates 4 The buzzer does not sound or continues to sound b Some segments of one or more digits do
41. rmal Approx ohm meter ON 0 ohm Remove lead wires from relay and OFF ohms operate the unit Abnormal Infinite or several ohms FAN MOTOR Measure the resistance Normal Approx 50 150 ohms Wire leads removed Ohm meter scale R x 100 Abnormal Infinite or several ohms TURNTABLE MOTOR Wire leads removed Measure the resistance Ohm meter scale R x 1000 8 Normal Approx 2 4K ohms Abnormal Infinite or several ohms 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 SURE TO GRASP THE CONNECTOR NOT THE WIRES 22 B CHECKOUT PROCEDURES 1 CHECKOUT PROCEDURES FOR FUSE BLOWING CAUTION REPLACE BLOWN FUSE WITH 20 AMPERE FUSE PROBLEMS CAUSES Fuse blows immediately after the door is closed Improper operation of the primary interlock secondary interlock switches and or the interlock Fuse blows immediately after monitor switch the door is opened Fuse blows when the door is closed and START key Malfunction of the Inverter the magnetron is touched the fan motor or the circuit board NOTES If the fuse is blown by an improper switch operation replace the defective switches and the fuse at the same time After replacing the defective switches with new ones make sure that they a
42. s 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 board to the oven assembly Adjust the latch board in the arrow direction so that oven door will not have any play in it when the door is closed Tighten the mounting screw Check for play in the door by pushing the door release 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 E Be Figure 17 18 10 INTERLOCK CONTINUITY TEST WARNING FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS TYPE NO SZM V 16 FA 63 OR VP 533A OF OR V 5230Q FOR PRIMARY SWITCH TYPE NO SZM V 16 FA 62 OR VP 532A OF OR V 5220Q FOR MONITOR SWITCH TYPE NO SZM V 16 FA 63 OR VP 533A OF OR V 5230Q FOR SECONDARY SWITCH A PRIMARY 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
43. tion 00 Hour 00 Minute b Cooking Time of Day in four digits 00 Minutes 00 Seconds c Power Control Level in three digits P 000 d Each Indicator Light shows which function is set and involved in the course of cooking by turning itself on Indicator Lights automatically go out upon completion of cooking 2 SENSOR COOK key Use humidity sensor for certain food item 3 HOMEMADE BAKERY key 3 food categories of preset cooking time and power level Roll Muffin Pancake amp French Toast 4 CHICKEN CHOICES key 4 food categories of preset cooking time and power level Chicken Wings Chicken Nuggets Spicy Chicken amp Mexican Chicken 5 CHILDREN S LUNCH key 3 food categories of preset cooking time and power level Hot Dog Buns Frozen Pizza amp Canned Pasta 6 FAST BREAKFAST key 3 food categories of preset cooking time and power level Oatmeal Bacon amp Scrambled Eggs 7 CLOCK Key Used in setting Time of Day 8 COOK TIME Key The TIME key is used to set the cooking time Touch the TIME key and then the number keys that correspond to the desired cooking time The remaining time is continuously displayed during cooking 10 9 STOP CLEAR Key Used to stop the oven or clear all entries except CLOCK 10 AUTO DEFROST key DEFROST MEAT POULTRY FISH amp BREAD Used in setting AUTO DEFROST 11 Q DEFROST key Used in setting QUICK DEFROST 12 KITCHEN TIMER Key Used as a kitchen ti
44. urntable Rotating Ring Assembly Accessories SPECIFICATIONS 1250W maximum 1200W maximum IEC 60705 Rating standard Adjustable OW through 1200W 10 steps 2 450 MHz 50 MHz 120V 12V AC 60Hz 11 Amp Forced Air Cooling Turntable Rectification Voltage Doubler Half Wave Inverter type Choke System Thermostat Open at 90 Close at 75 Fuse 20A Primary Interlock Switch Secondary Interlock Switch Interlock Monitor 2M261 125V 20W Digital up to 99 mm 99 sec in each cooking stage Tempered Safety Glass 2034 W x 151 4 D x 191 4 H G 5 C 5 C 1714 W x 9 D x 1634 H 1 4 Cu ft SWITCH CHART PRIMARY SECONDARY INTERLOCK SWITCH MODE INTERLOCK INTERLOCK MONITOR SWITCH SWITCH SWITCH COM COM COM CONDITIONS DOOR OPEN DOOR CLOSED NOTE Use the above switch chart with circuit diagram on page 7 PRIMARY 6 OVERALL CIRCUIT DIAGRAM A SCHEMATIC DIAGRAM INTERLOCK SWITCH FILTER BK RO suyla kamukuna ASS Y I 1 RD RD gt FUSE BK Il 20 E701 CN i INVERTER 702 Arm d ELE FAN p TABLE MONITOR MOTOR MOTOR SWITCH CN701 INPUT ve AC WH YL 120V 60Hz 1 al ro WH MAGNETRON THERMOSTAT SECONDARY INTERLOCK GN PK SWITCH
45. vice personnel should Tell the user not to operate the oven Contact the manufacturer and CDRH Center for Devices and Radiological Health immediately NOTE Address on CDRH Office of Compliance HFZ 312 Center for Devices and Radiological Health 1390 Piccard Drive Rockville Maryland 20850 4 The service personnel should check all surface and vent openings for microwave emission testing 5 Check for microwave energy leakage after every servicing The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 1mW cm sq And always start measuring of an unknown field to assure safety for operating personnel from radiation leakage NOTE The standard is 5mW cm sq while in the customer s home 1mW cm sq stated here is manufacturer s own voluntary standard for units in customer s home 2 EQUIPMENT Electromagnetic energy leakage monitor NARDA 8100B HOLADAY HI 1501 600cc glass beaker Glass thermometer 1009C FFI 12 B MEASURING MICROWAVE ENERGY LEAKAGE 1 Pour 275 15cc of 20 5 C water in a beaker which is graduated to 600 cc and place the beaker in the center of the oven 2 Set the energy leakage monitor to 2 450 MHz and use it following the manufacturer s recommended test procedure to assure correct result 3 When measuring the leakage always use the 2 inch 5 cm spacer supplied with the probe 4 Operate the oven

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