Sharp KS-COM18, Service Manual

Page 1: ...S COOKING WARMING TEST METHOD TEST MODE SPECIFICATION BEFORE CALLING FOR SERVICE SERVICING POST REPAIR INSPECTION TROUBLESHOOTING GUIDE SERVICE PARTS LIST 2 3 4 5 5 5 7 8 10 11 12 16 17 18 19 20 21 21 22 24 25 27 Page ELECTRONIC JAR RICE COOKER WARMER MODEL KS COM18 In the interests of user safety Required by safety regulations in some countries the set should be restore to its original condition ...

Page 2: ...nner pot handle Handle Panel ring OPERATION BOARD Display Slow cook button Timer button Plain rice button Porridge Congee button Mixed rice button Cake Bread button Glutinous rice button Warm lamp indicator Warm Off button Cooking Time button Power cord Lid Lid cap PARTS IDENTIFICATION ...

Page 3: ...of product approx kg Height 296 408 242 4 1 Safety device Temperature fuse 169 o C Cooking Chart Cooking time may varying depend on the kind or volume of rice or ingredients Cooking time is set at specified voltage room temperature 20 25 o C water temperature 20 25 o C and under standard water level No need to soak the GLUTINOUS RICE before cooking For cooking Kiaw Ngu Glutinous Rice should be red...

Page 4: ... ass y Part No Cord length 1 03 m 22N405ASY 220V 830W rating wattage 22N402 Thermistor type with connector Temperature fuse 169 o C 10A 22N403ASY Power 77W Resistance 484 Ω 5 Resistance wire spec 547 2 Ω m 220V 22J3031ASY 22N401 Power 30W Resistance 1613 3 Ω 5 Resistance wire spec 1210 Ω m 22J33112 Power 30W Resistance 1613 3 Ω 5 Resistance wire spec 1210 Ω m 22A109TASY ...

Page 5: ...using the rice cooker to heat just water PRECAUTIONS 5 1 Place of use Do not use the cooker on a wet floor under direct sunlight or near the gas table Do not use the rice cooker within 1 m of TV or radio to prevent the interference While cooking do not put the rice cooker on or near combustible materials such as curtains or vinyl carpets 2 How to handle before use Do not disassemble or repair the ...

Page 6: ...en in the recipe pages of the operation manual After measuring the amounts of rice seasonings and ingredients adjust the water level and stir well with a plastic spoon If the seasonings are settled it is possible to result inadequate cooking Cut the ingredients rather fine put them on the rice and not mix with rice Stirring may result in unsatisfactory cooking 2 Cooking rice During cooking rice cl...

Page 7: ...osion and bad smelling may possibly be caused If the customer used the correct method for cooking the rice and there is a bad odor the problem may be caused from bacteria If this is the case the unit should be sterilized and disinfected by performing the following The inner pot and the lid cap is thoroughly washed and immerse in hot water for 30 60 min And then wipe off water thoroughly with dry c...

Page 8: ...8 WIRING DIAGRAM CIRCUIT DIAGRAM ...

Page 9: ...9 SCHEMATIC DIAGRAM Faston tab terminal Faston receptacle terminal Connector Housing side Connector Post side ...

Page 10: ...10 ...

Page 11: ... Power supply and detector circuit Temp detector circuit TH1 Room temperature thermistor Thermistor plate ass y Display User interface circuit Thermistor temperature o C Thermistor resistance kΩ TH1 TH Plate 5 0 0 0 20 0 30 0 50 0 60 0 66 0 68 0 70 0 75 0 100 0 125 0 45 74 34 70 12 61 8 00 3 51 2 42 1 71 1 45 0 680 205 6 159 2 61 48 39 72 17 72 12 20 9 83 9 16 8 55 7 20 3 23 1 58 MODEL NAME MODEL ...

Page 12: ... Upside down the rice cooker and remove 4 screws fixing the body 2 Remove body from the panel ring 3 Remove cord reel from the body 4 Remove the screw holding the contact plate cover 5 Remove 3 terminals from the cord reel ass y 6 Now the cord reel ass y is free The method of removing these wires is shown Terminal of earth lead wire Fig 1 Screw Cord reel ass y Contact plate cover Earth lead wire B...

Page 13: ... 1 Remove the lid cap from the unit 2 Remove the body in accordance with REMOVE OF BODY 3 Remove the screw holding the hinge cover 4 Disconnect lead wire Lid heater from PCB ass y and remove the screw holding lead wire earth from outer pot 5 First release the latch button and open it to a normal degree 6 Remove the lid ass y from the panel ring 7 Now the lid ass y is free PCB ass y Inner lid lead ...

Page 14: ...MOVE OF BODY 2 Disconnect all lead wires of heater plate from the PCB ass y Fig 5 3 The heater plate ass y comes off by removing 3 screws Fig 5 4 Now the heater plate ass y is free CAUTION When assembling be sure not to catch the lead wires for the inner lid heater As shown in Fig 4 the lead wires of the lid heater are to be passed under the rib of the lid cover and passed above the hinge pin Afte...

Page 15: ... ass y is free 15 DISENGAGE PCB ASS Y 1 Remove body in accordance with REMOVE BODY 2 Disconnect all the lead wires of PCB ass y 3 Remove the 3 screws fixing the PCB ass y to the panel ring Fig 6 4 Now the PCB ass y is free Fig 6 Always replace the display cushion because it may be damaged CAUTION Fig 7 1 Remove body in accordance with REMOVE OF BODY 2 Remove thermistor plate ass y in accordance wi...

Page 16: ... Setting cord reel ass y Be sure to set the cord reel lead wires through type holes provided in the recess of the body 2 Affixing the display cushion Peel the backing from the display cushion and affix the display cushion inside the border of the key top 3 Installing the body When installing the body make sure internal lead wires are not routed over the spacer before tightening screws 4 Latch butt...

Page 17: ...er completion of the simulated cooking measure the time the warming lamp ON and simultaneously open the lid and confirm against presence or not of water in the inner pot 3 Judging criteria The rice cooker may be judged to be roughly good when the display is normal and the following conditions are satisfied 1 Contact with the heater plate is close enough if the bubbling condition is uniform along t...

Page 18: ... program and after energizing about 2 minutes the WARM OFF button is pressed to cancel Then press the WARM OFF button to select warming and continue warming for about 1 hour 2 It is OK if the reading of the bar thermometer is within the following range 3 When the above temperature specification is not satisfied replace the thermistor ass y in the Replacing method for main parts How to remove heate...

Page 19: ...19 TEST MODE SPECIFICATION To enter TEST MODE A plug is inserted with key Timer Warm OFF Pushed at the same time ...

Page 20: ...ter plate Was the rice kept warm in the rice cooker for more than 12 hours During cooking operation Immediately after cooking When rice is kept warm Power interruption occurred Rice may not be cooked properly Because power interruption make programmed time clear Steam appear from other than the steam vent Rice is too hard and uncooked at the core Rice is too soft Rice is scorched Rice becomes dry ...

Page 21: ...er under soldering over soldering tunnel etc As to tab terminals be sure to solder after lead clinching POST REPAIR INSPECTION 1 Reconfirmation of work done and inspection 1 Is anything left carelessly such as screw spacer 2 Is there no mis wiring 3 For final inspection and operation check Refer to page 19 Are key operation and display corrected 2 Insulation performance 1 Insulation resistance tes...

Page 22: ...ys are inoperable 2 Faulty outer frame and PCB ass y parts or faulty key top rendering keys inoperable Repair the assembly or replace faulty parts Faulty PCB ass y Replace the PCB ass y Faulty timer operation Rice cooker does not operate as programmed 3 Faulty wiring Repair the wire Faulty PCB ass y Replace the PCB ass y Rice cooker does not cook 4 1 Faulty cooking heater Replace the cooking heate...

Page 23: ...heater or faulty installation Repair the side heater Faulty thermistor ass y Replace the thermistor ass y Faulty PCB ass y Replace the PCB ass y Warm function operates but rice becomes dry Warm temperature too high Rice is too dry Rice turns yellowish Rice has a strange smell 6 2 Lid is not closed tightly Repair the lid or close the lid tightly Lid cap is not installed securely Install the lid cap...

Page 24: ... Replace the thermistor ass y Replace the PCB ass y 6 3 Warm function operates but rice becomes watery Warming temperature too low Rice becomes sticky Too much condensation Rice becomes yellowish Rice has a strange smell Sour or old smell Faulty thermistor ass y 24 1 When the cooker does not warm rice properly check caution items at warming page 7 2 When thermistors open or short TIMER display on ...

Page 25: ...ING 1 2 5 22N501 UPPER STEAM PACKING 1 2 6 22N302ASY HOLDER PLATE ASS Y 1 2 7 22N214LGASY INNER LID FRAME ASS Y LIGHT GREY 1 22N214WHASY INNER LID FRAME ASS Y WHITE 1 2 8 22N213W STEAMER RACK 1 2 9 22N306ASY INNER POT ASS Y 1 2 9 1 22N208ASY INNER POT HANDLE ASS Y 1 2 10 22N207DGASY PANEL RING ASS Y DARK GREY 1 22N207LGASY PANEL RING ASS Y LIGHT GREY 1 2 11 22N203LG LATCH BUTTON LIGHT GREY 1 22N20...

Page 26: ...ORD REEL ASS Y 1 3 2 22N403ASY THERMISTOR PLATE ASS Y 1 3 3 22N402 HEATER PLATE ASS Y 1 3 4 22N401SET PCB SET 1 3 5 W07A105XC LEAD WIRE BAND 1 3 6 22N404 EARTH WIRE ASS Y สาย Ground for Holder Plate Outer Pot Cord Reel 1 3 7 E03A300GG Main Lead Wire สาย Earth For Body Outer Pot 1 ...

Page 27: ...27 1 3 2 10 2 4 2 5 2 12 2 14 2 11 2 1 2 2 2 3 2 6 2 7 1 13 2 8 1 12 3 4 3 3 2 18 3 2 2 19 2 17 2 15 2 16 2 13 2 9 1 2 9 KS COM18 2 20 3 1 2 23 2 22 2 21 ...