Service Manual
Contents
1. 39 Lead Wire AforHeater ARLGOA6M IA 40 LeadWireBforHeater ARLGTASM 1 TT a ARY18G50W0 1 Canada ony 23 AMERICA CANADA PARTS ON THE PCB Part Name Part No Model pcs set SR MM1ON SR MMTBN B RL A SW1 A B N z DE alen mam ro ale mae ae pm E ape aem fem fume SMALL STANDARDIZED METAL PARTS Z T T TRI TR2 LED 1 LED N LED 3 X gt r O 1 X2 SRO SEMEN 0 Tapping Screw Tapping Screw Tapping Screw BAZAR O 3 3 ForPOBBase Tapping Screw Tapping crew XTB4 156FU 4 4 ForBdy ems Screw XYNACIENS 2 2 PACKING LIST SR MM18N ARZSSASSUNO 1 Amenaony ARZ66A692 W0 America only Outer Carton ARZSSCSSANQ Camada only TL Canada only inner Packing Case ARZOiAszWO 1 America only inner Packing Case ARZOICSSTAWO Candeony inner Packing Case ARZoics2wo 1 Canadaony Upper Pad Assy ARMM 1 o UpperPadAssy ARZO4414000 _ f S 8 FS a 24 AMERICA CANADA Part No Models pcs set 1 lowerPadAssy ARZM Mi30U Warranty Card National2. Control Unit Assy _ Oe 7 7 o o I TPVB El TPTHZ x D2 TPTH4 1SS133T77 C 3 0 0 3 P 155133177 TPTH1 E A ZD2 MTZJS 60177 DA 155133177 DS i m TPTH2 TPTH2 A 155133777 a _ L sel hel T D7 l ETP24Y38AY jo SES SKY GM gt 3d De Di i D6 MA 7 1SS N TAS A 133 152471T77 77 O T A TPVB 620 O TI BA CR23 6 1HF O 9 TPC TPS 9 e 0 t i TPSI 4 ib 2 n Ey R46 TPTR1 TPTR Gij 5 40 nao R47 TPTR g TP TR 112W Ge AIC 10 T T 10 R50 NE R48 TPRL TPRLZ 2 7K 6 18K C 1 112 ER A R51 S 309ASTA 2 7K operatio 1 2W AJS3212001 Sources of electricity side TP6 MN151216R0 _RCD1688T rza com FE ne I ZO os BO DT 7 TH TONE op Ersecogoer Pa sou ac 22 TPTH3 w i 1 820K do o 43 D17 paa 1 10W IK OO 30 AB I S Aio R18 aa 1 10w 15 2 TPTH1 B20K TPLA R19 1 10w 8 2K 2 A MA 74 a 8 R2O 1 10W 2 4K 2 yR1 As _1 10W_2 4K 2 PENT 1 10 ats 76 R23 Mi 10W IK N TPL3 0 18 EHAERES888US a gies LL SW1 ls 3 H2 1 1OW22K E L 7 z st SW2 TPS3 Laaa R3 1 10 22K 4 Lo SW3 ITPS4 am R OW 22k Las 7 SW ITPS5 L am RS iowzrk 1 3 iL a l sws R6 i TPS6 1 10W 22K 37 1 qdo SWE R7 1 10W 22K R8 1K 5 M E AP 8 PL 8 TP2 TP3 6 i R9 16 o T
3. 18 EscutheonA ARNZiASSIXLU 18 EscutheonA ARNZiASGZXLU 1 I 19 EscutheonB ARN24A591 D0 20 Spring for Hook Lever AREO0 amp 413 2 2 L Jj 22 POBBase ARO t 3 24 Protecting Frame Assy AREZOAB91000 t 24 Protecting Frame Assy AREzoAsez00U J 25 Tapping Screw _ ASR amp TiMAAN O 26 Outer Spring ASR3260T H 1 L Thermostat Base ARPA LL Q7 ThermostatBase ARE29414 Tor 28 Name Piate ARYO0A501W0 Amencaony 28 Name Plate ARYOOASS2WO 1 America only 28 Name Piate ARYOOCSSIWO t Canadaony 28 Name Plate ARVO0CS82 Wo 1 Ganadaony 30 BodyAssy AREfOJAAWOU We TT 80 Body Assy AREfOJAIAWOU 1 We 3i FootRuber J83453000 2 2 33 Scop ARK022760 1 34 Measuring Cup ARK0 amp 2761 38 Scoop Holder AREMS0i 1 A 36 Steam Plate Assy ARKSIH238000 1 T 86 Steam Plate Assy ARKSiES3500U 1
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6. ORDER NO MEL0011048C3 Service Manual Electronic Rice Cooker SR MM10N SR MM18N Specifications Approx National Power Supply Power Consumption Capacity quim Suh Porridge Power Cord Length Weight Approx 0 09 1 0L 0 5 5 5 cups 0 18 0 9L 1 5 cups 0 09 1 0L 0 5 5 5 cups 0 18 1 0L 1 5 5 cups 0 36 1 8L 2 10 cups 0 09 0 27L 0 5 1 5 cups 0 09 0 18L 0 5 1 cups 0 18 0 54L 1 3 cups N i 3 SR MM10N SR MM18N 120VAC 50 60Hz 84 8W 0 18 1 8L 1 10 cups 0 36 1 44L 2 8 cups 0 18 1 8L 1 10 cups 0 09 0 54L 0 5 3 cups 0 09 0 36L 1 2 cups 0 36 1 26L 2 7 cups 1 7L max 2 5L max 1 7L max _ 2 5L max A WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death TABLE OF CONTENTS Specifications ceca rn rre rro rr nn nro rana ehh Caution Notice
7. P4 E 22K TPS h 27 R10 HOW 330K x TPX2 1 c3 CB 11 Oso T J TPTAS 24 TPX1 e i C2 1000P 777 7 7 1000P Y 8 23 18P oras Ie XVI i V R11 i X1 og now CST4MG 22K W035T aum m EEEE i operation side BZ R39 sk A38 en 61 L _ _ PS1440P028T m m E 10 TEST METHOD Pre test setting Make sure that the LCD panel shows the current time with the inner pan set in the cooker and the power cord plugged into the wall socket Bubble Test 1 Insert the pan into the cooker main body and then turn slightly the pan clockwise and anti clockwise to place the pan properly on top of the cast heater 2 Pour a small quantity of water into the pan so that the bottom of the pan is immersed with water Close the lid completely 3 Press the Menu Select key and select Quick Cook polished rice high speed cooking mode After that press the Start Reheat key 4 When the water boils the cooker will blow off steam When you see the steam open the lid and than press the brim of the pan to completely touch the bottom of the pan to the cast heater Check the water bubbling condition Bubble See the right figures If water bubbles equally along the circumference Acceptable If no bubbling area is one forth of the circumference or more Unacceptable If the test result 1s unacceptable check that the bottom of the pan is not in
8. and Contents sees esent Location of Controls and Components p How to adjust current time 1 uununepepenusppussssavasosesunevesouuneoseesssnnneo How to cook rice Q Q o Q Q 25 t X Lees eh hehehe neni nn Reheat Rice and Cook Timer G e Keep Warm function eessesee een h emnt Wiring Diagram arena nen cenes menor enhn hen neh nennen on Q P N a Schematic Diagram 1 cecccnrccnccnncncannnc cnn rannonnrnoracnoroonenonacoss Circuit Diagram o o Q C _ A k eseee eeeeeee racer cena cce nenne nnnrrnannrocononnncnannnas Test method eneaneenenenneensenensseenensensersnnenensnnnners Keep Warm test j ee eese c ce renca cone r sena cantadas Quick check of P C B Q eeeeeeeeeehen hehehe nnne Adjusting of Keep Warm temperature l tLTtltu P C B explanation gt Q Q anennenssensennensenonvsenssennsnsssevensenvennseen Problem Diagnosis table Vol 1 Problem Diagnosis table Vol 2 reeaean ana znaconano no naa ao hene honore Disassembly procedure NOCE Location of parts eeeeese
9. complete contact with the cast heater Check the heater surface for foreign material and remove the foreign material or replace the defective part pan or cast heater Steaming Test 1 Perform bubble test and confirm that the water bubbling condition is acceptable After that place two or three sheets of tissue paper gauze into the pan in such a way that the sheets are spread over the bottom of the pan then leave the cooker on without closing the lid Note 1 Be sure to fully open the lid to protect the __ plastic parts from thermal distortion caused by steam u 2 Make holes in the tissue paper gauze as shown so that it will not float up during steaming Holesof tissue paper 11 2 Monitor the amount of time it takes for water in the cooker to steam away complete until there is no steam and the switching timing of the LCD Normal Range Before Timing steaming Within one minute One minute or ends within one after end of minute before end of more steaming steaming Before After One minute or less One minute or less Switching timing of the LCD 3 You can conclude that the unit has passed the steaming test if the LCD switches within the normal time range at the end of steaming If the unit fails the switching timing test check for poor contact between the inner pan and the pan sensor If necessary remove any dirt deposit fro
10. disconnect the plug an audible signal and the rice cooker automatically goes into Keep Warm mode Keep Warm Function e To avoid odours and discoloration do not use the Keep Warm e When only a small amount of rice is mode for more than 12 hours being kept warm to avoid excess drying e The timer indicates the keep warm period for up to gather it compactly into the centre of the 23 hours After that the keep warm mode continues to inner pan and occasionally fluff it operate but the timer will recycle to the next 24 hour period sprinkling in a small spoonful of water Time indicated for approx 5 cc per portion of rice Keep Warm period of less than 1 hour h hour e Do not use the Keep Warm mode for mixed rice or rice porridge e It is not unusual for there to be condensation on the inner lid when the Keep Warm mode is used How to carry the set The set can be carry 2 different way 1 By holding the Handle 2 By lifting the set with two hands WIRING DIAGRAM SCHEMATIC DIAGRAM P C B Complete Outer Lid Pan Sensor Cast Heater Blue Thermal Fuse m rm o o m ao mn ro o a ee eee eee eee eee eee CIRCUIT DIAGRAM white 7 a NG la Sensor TH y 0HT273811GR l P b Liga Lig Sensor I DHT273B1BPI 3 l ly E T F Yellow Orange CN1 EM 1 Lid Heater D I le white Side Heate 3 MR Cast Heater O TPTR4
11. e enn hhn rece cameras acesa anda Replacement parts list eese eene hehehe Replacement parts list of P C B and Screw neesseseessssee suu see sean LOCATION OF CONTROLS AND COMPONENTS Rice Scoop Steam Vent 4 Inner Pan __ Control Panel Hook Button Steam Plate Measuring Cup 180ml How to adjust the current time Set the time accurately Display Window Hour Minute Plug in Do not pull the power cord beyond the coloured tape Adjust the current time e Press or Min key The display will start blinking The clock can be adiusted while the display is blinking e Keep the or Min key pressed down to fast Ex PM 8 15 forward e The time display stops blinking after five seconds This unit uses a 24 hour clock When setting the time at 12 midnight the time set is 0 00 O The time cannot be set while cooking warming or using the preset function HOW TO USE How to Cook Rice E Control Panel switch Keep Warm Start Indicator Indicator Start Reheat key Timer key Cooking Timer Off Fresh Keep Warm key Menu Select key Timer Indicator Hrs key Preparation Measure the rice with the measuring cup provided e Rice can be rinsed in the rice cooker Rinse the rice until the water becomes relatively inner pan clear Add water e To cook Rice Porridge rice and wate
12. eign substances stuck to the surface of the pan sensor Rice on the bottom of the inner pan is scorched dark 78 C or higher Keep Warm temperature is low 68 C or lower Simultaneously replace the warming heater and radiator plate unit Keep Warm LED tights up This may occur by unplugging or insufficient loosening of rice Droplets fall onto the surface of the rice This may occur when the lid is kept open for a long time or by insufficient loosening of rice 16 The surface of the rice dries up PROBLEM DIAGNOSIS TABLE Vol 2 for the PCB Note The marks and indicate suspect components of the cause of the malfunction in order of probability The mark shows the components of the other causes Drawing No 1 SW LOD x2 x BZ T RL TRIJBAT Remarks T The probable cause is melting of the fuse Suspect Component LCD Quartz crystal resonator Transformer Tact switch O Q ES Go o Y o Buzzer Relay Triac Battery Ma function LED lights up LED dose not lights up Indicates HO1 on LCD Indicates H05 on LCD Cannot cook rice correctly Stops early or cooking is uneven etc IRice on the bottom of the in linner pan is scorched idark brown Keep Warm temperature is high 78 C or higher The Keep Warm tempe
13. emove the Cast Heater from the inner Cast Heater enclosure 5 Reassembly a After replacing the Cast Heater to reassemble the unit reverse the disassembly procedure above _ 21 A CUECA SINO a ADDED PD A APATIA PODIA w XTB4 12AFU des uim sos due G cup GUN AM AMD R Qs s QUE zd RM HA W G m CE ae s My LOCATION OF PARTS XTB4 10BFU XTB4 15CFU XTB4 15CFU 22 REPLACEMENT PARTS LIST e O _ SR MM10N SR MM18N 1 PCB Complete ARHOTAS6 60U 1 Wih Component 120V Tt PCB Complete ARHOTA59200U With Component 120V 2 LeadWreA ARAM i ast Heater Ass y Cast Heater Ass y ARL20A59100U S D a 0 gt gt Z J gt On O N 5 SESSIE BIES heathed Heater 120V Sheathed Heater 120V m N O gt O O N Q e c 6 Thermostat CaseAssy ARS14A59100U 6 Thermostat Case Ass y 1 E ARC00 413 WO 1 rey Steam Vent Ball RB78 413 HG Outer Lid Ass y Outer Lid Ass y Caution Label Caution Label Outer Lid Cap Hinge Shaft rey hite ite merica only Canada only RB01A592WOU RB32R238 SR148C093 X RB59 413 WO RB74 413 Glo AISI SIN P P P P 5i A UJ e 2 m O C gt s 12 Hinge Spring ARB70 413 i4 Pan ARSOMO 4 Pan ARESM52 _ 15 ARB10 414 WO White am
14. es eq uoiioeuuoo e USUM dn s3431 2031 1941 49949 poyjow uo 3en e8 3 031 ss pue gA di u wsq q 50 30 JuowounseGu e 103 Y92949 IMS 8uissead UAUK pouieu uo Jen BAJ tes ssed LS pue gA dl ue mj q 850 jO JUAWOINSEAM e 404 499y9 EAS 3uissead usyy pesojo si 11 pue 9 dl ueew3eq UO 399UUOO e USUM dni s3431 1031 2843 w2eu pou3eu uoi3enje 3 33145 34817 1031 qno dn seo s343 7 rg Bui 15 PROBLEM DIAGNOSIS TABLE Vol 1 for the cooker s main unit Note The marks and indicate suspect components of the cause of the malfunction in order of probability The mark O shows the components of the other causes Drawing No 2 3 4 s Jiejie jj Romrks When according to diagno Suspect o stic evaluations the Component 5 5 I E E suspect components are on sel 3 0 E 8 the control board Refer l IE m pages 15 16 que o Y c o e EO 3 d c Q o a S O a n COOKING LED lights up COOK ING LED dose not O lights up Indicates H01 on LCD If the fuse has melted remove the cause and replace it Indicates HO5 on LCD This may occur due to user s wrong measurement or Cannot cook rice correctly Stops early or cooking is uneven etc insufficient loosening of rice Check that there is no dirt or for
15. ion was not activated automatic transition to warming To prevent the rice from drying out Warm indicator lamp comes on e Do not repeat Reheat function The Keep amp e Do not use the Reheat function for a small amount of rice gt When a small amount of rice is to be reheated fluff the rice 3 Fluff rice make its surface fiat and sprinkle approx 1 teaspoon of water for every 1 cup of rice approx 185g in order to keep the rice from drying out too much Rice can not be warmed adequately when the amount of rice in the pan is more than 1 2 Press the key again to keep the rice warm capacity Be sure to fluff the rice and make the surface of B Caution when using the Reheat function B After setting the reheat function ub To cancel this setting press the Off key Cook Timer Put the ingredients and Amount of water to use cold or hot water into the pan information Press the key to e Rice porridge can not be made set the time from cooked rice with the Cook e One push brings up Cook on the display Timer function e Each push then changes the time through a 60 minute cycle e g 5 min gt 6 min Note 60 min gt 1 min gt 5 min etc e To avoid odours wash the Press the inner pan immediately after e key use Start After cooking has started the time on the Reheat display counts down in one minute intervals After use press the Off key 7 When cooking is done there is and
16. m between them or replace the inner pan and or the pan sensor Depending on the cooking time the LCD will switch from complete cooking to Keep Warm skipping the time remaining for the steaming process This is normal and this timing is considered as the switching timing of the LCD KEEP WARM TEST 1 Place a mercury thermometer between urethane foam blocks Urethane foam blocks ASN 300 and the thermometer ASN 150H are supplied as spare parts 2 Place the urethane foam blocks holding the thermometer in the center of the bottom of the pan and allow the cooker to run in the Keep Warm process 3 More than one hour later open the lid and read the temperature within 10 seconds The temperature in the 69 C 77 C range is normal If the warming temperature lies outside this range make sure that no dirt or foreign material is stuck on the pan sensor or on the bottom of the pan If nothing is found adjust the warming temperature and replace the control circuit board as described in adjusting the Warming Temperature on page Urethane Mercury Thermometer Mercury Thermometer 12 QUICK CHECK TEST OF THE CONTROL BOARD Check performance of the P C B in accordance with the procedure If any failure event or error is determined replace fault part on the circuit board o or the whole control circuit board based on the troubleshooting list Vol 2 shown in page and the measure for checking parts stated in page 1 Connect
17. r are to be M To cook White Rice or Mixed rice measured with the measuring cup provided e g For 1 cup of rice add water until it reaches level 1 LEVEL INDICATOR MAXIMUM LEVEL Do not cook with more than this level of water 3 1 2 cups _ Attach the inner lid onto the outer lid Place the e Wipe the surface of the pan before 3 pan inside the body Make sure that the pan is use If it is wet it may cause noise directly in contact with the heating plate by turning it while cooking slightly from the right to the left until it sits properly It may also damage the unit Close the outer lid Make sure to lock it properly e If the outer lid is not securely until it clicks Plug in closed cooking will be affected e Do not open the outer lid when in Start to Cook use Press Menu Select key to select a menu e When cooking Mixed rice select A indicator shows the menu which is selected White Rice menu e When cooking rice porridge set the A White Rice Quick Cook indicator to Porridge on the control panel Otherwise it will boll over 5 Press the key to start cooking Te start indicator comes on ti follows When rinsed rice is soaked in water for more than 30 o ne unit displays the remaining time as motos minutes Precook Course which lets rice absorb water e Cooking is finished approximately 20 minutes sooner than with normal rice cooking This is a heating method tha
18. rature can be adjusted Refer to page 14 The Keep Warm temperature can be adjusted Refer to Keep Warm temperature is low 68 C or lower Droplets fall onto the sur face of the rice oo o loe ej o _ 17 DISASSEMBLY PROCEDURE 1 Replacing of Outer Lid Ass y a Push the Handle backward Remove the Hinge Cover by using a minus screwdriver Outer Lid Assy b Disconnect the 3 connectors Outer Lid c Push the Outer Lid Ass y backward a Outer Lid and remove the Hinge shaft from the slot Assy Handle Hook Button 2 Reassemble a After replacing the Outer Lid Ass y to reassemble the unit reverse the disassembly procedure above 18 Replacing the P C B comp 1 Remove the Hinge Cover and Outer Lid Ass y a Remove the above mentioned items see 1 2 on page 2 Remove the Handle a Push the Handle to backward as shown in the diagram b Pull the Handle at both side as shown 3 Remove the Cord Reel Cover screw a Place the cooker upside down on a rubber sheet over the cooker to protect it as shown in the diagram b Remove the Inlet Cover screw 1 pc Cord Reel Cover 4 Remove the Body a Remove the Body screw 4 pcs b Remove the Body by using a minus screwdriver as shown Outer Lid Assy Remove the Cord Reel Ass y a Detach the two lead wires and the Cord Reel Ass y from the slot Terminal Connector Outer Lid As
19. s y 5 Remove the Wiring to P C B comp a Remove the fast on terminal and connectors PCB Base 6 Remove the P C B base a Remove the P C B base screw 3 pcs b Remove the Hook Button c Replace a new P C B with P C B base 7 Reassembly a To reassemble the unit reverse the disassembly procedure above Replacing of Thermostat Ass y 1 Remove the Outer Lid Ass y and Hinge Cover a Remove the above mentioned item see 1 2 on page 2 Remove the Handle Inlet Cover Body and P C B comp a Remove the above mentioned items see 1 7 on page 3 Remove the Thermostat base Thermostat i S a Remove all the Lead wires attach Base Screw b Remove the Thermostat base fixing screw 3 pcs A 4 4 Thermostat Base 20 4 Remove the Thermostat Ass y a Turn the Thermostat Ass y as shown and pull Thermostat Case Ass y Thermostat Base 5 Reassembly a After replacing the Thermostat Ass y to reassemble the unit reverse the disassembly procedure above Replacing of Cast Heater 1 Remove the Outer Lid Ass y and Hinge Cover a Remove the above mentioned items see 1 2 on page 2 Remove the Handle Inlet Cover Body and P C B comp a Remove the above mentioned items see 1 7 on page 3 Remove the Thermostat base and Thermostat Ass y a Remove the above mentioned items see 1 4 on page 4 Remove the Cast Heater a Remove the Cast Heater fixing screw 1 pc b R
20. t gives priority to shortening cooking time Thus the rice may be a little firmer and more browned than usual e Do not use Quick Cook Course for Mixed rice e Precook Course and Preset Timer features cannot a saa EZ White Rice Quick Cook Porridge 29 42 min 63 min When the cooking is done the buzzer sounds with 7 automatic transition to Keep Warm mode be used with Quick Cook Fluff the rice as soon as possible within 30 minutes e Keep Warm function should only be used with plain after the beeper sounds white rice Warming other kinds of rice is not E After use press the Keep Warm Off key and recommended disconnect the plug e Rice may be too sticky if it is not fluffed If you fail to press the key Keep Warm mode starts automatically when the plug is connected the next time Reheat Rice Reheat the rice during Keep Warm to make the rice hotter it flat Otherwise the rice may become browned e Do not use the Reheat function when the Keep Warm indicator does not light because the rice cooking function will start Press the key e Do not use the Reheat function except when cooking White Rice The Fresh Keep Warm becauseitmay cause browning or discoloration indicator lamp starts blinking e The reheat function can not be used when the e The reheating time is about 5 temparature of the rice is under 65 C Beeper minutes sounds 4 times to let you know the Reheat e The beeper sounds with funct
21. the unit to a power source by inserting the plug into an outlet In the stand by mode using two fingers simultaneously press and hold the Start Reheat and Keep Warm Off WO With the keys pressed if all areas on the LCD panel light up as shown at right in Fig B the control board can be judged to be normal releasing any or all of the keys will cancel the test condition When releasing the three keys all indicators change Fig C and Start Reheat lamp turn ON the light Short buzzer sounds one time for second After the buzzer sound indicate cooking operation starts The pan sensor indicates that the temperature reaches the cooking end level the heating operation switches the warming mode LJ 4 Push Keep Warm Off once Push other keys and confirm that operation is normal After carrying out procedures to 4 if test results are normal you can conclude that the P C B comp has passed the test 13 ADJUSTING THE KEEP WARM TEMPERATURE When adjusting the Keep Warm temperature be sure to disconnect the power to the unit by unplugging the cord The Keep Warm temperature can be adjusted by turning VR on P C B operation Keep Warm temperature is changed by turning P C B comp on VR Please turn VR1 with a screwdriver with LCD side like the left figure Turning VRl 10 degrees counterclockwise increase the temperature by about 1 C Do not increase the temperature more than
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