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Sharp KS-COM18 - User Manual

Sharp KS-COM18
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SHARP CORPORATION
SHARP SERVICE MANUAL
TABLE OF CONTENTS
PARTS IDENTIFICATION .............................................................................................................
SPECIFIC INFORMATION ...........................................................................................................
PART SPECIFICATION ................................................................................................................
IMPORTANT SAFEGUARDS .......................................................................................................
PRECAUTIONS ............................................................................................................................
CAUTIONS FOR USE ..................................................................................................................
WIRING DIAGRAM AND CIRCUIT DIAGRAM .............................................................................
EXPLANATION OF CIRCUIT .......................................................................................................
REPLACING METHOD FOR MAIN PARTS .................................................................................
COOKING/WARMING TEST METHOD ........................................................................................
TEST MODE SPECIFICATION .....................................................................................................
BEFORE CALLING FOR SERVICE .............................................................................................
SERVICING ..................................................................................................................................
POST-REPAIR INSPECTION .......................................................................................................
TROUBLESHOOTING GUIDE .....................................................................................................
SERVICE PARTS LIST .................................................................................................................
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3
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5 - 7
8 - 10
11
12 - 16
17 - 18
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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 and only parts identical to those
specied should be used.

Table of Contents

Questions and Answers

  • A
    Allen FaulknerAug 16, 2025
    Why is my Sharp KS-COM18 not cooking rice properly?
    • A
      Ashley SmithAug 16, 2025
      If your Sharp Rice Cooker isn't cooking rice properly, consider these potential causes: * The cooking heater might be faulty, requiring replacement of the cooking heater assembly. * There could be faulty wiring of the cooking heater assembly, which means you should repair the wire. * A faulty harness of the cooking heater assembly could be the problem, so you may need to replace the cooking heater assembly. * The thermistor assembly might be faulty, requiring replacement. * Lastly, a faulty PCB assembly could be the cause, in which case the PCB assembly should be replaced.
  • S
    shawryanAug 22, 2025
    How to fix burned rice in my Sharp KS-COM18?
    • R
      Richard HarrisAug 22, 2025
      If your cooked rice has burned parts, consider these potential causes: * The cooking heater assembly and/or inner pot may not be cleaned thoroughly; ensure they are cleaned properly. * The rice may not have been washed thoroughly; make sure to wash it thoroughly. * A faulty thermistor assembly could be the issue, requiring replacement. * A faulty PCB assembly might also be the cause, in which case the PCB assembly should be replaced.
  • C
    Carmen DayAug 25, 2025
    Why does my Sharp KS-COM18 Rice Cooker warm function make the rice dry, yellowish, or give it a strange smell?
    • J
      johnperezAug 26, 2025
      If your Sharp Rice Cooker's warm function is making the rice dry, yellowish, or giving it a strange smell, consider the following: * Ensure the lid is tightly closed; if not, repair the lid or close it tightly. * Make sure the lid cap is securely installed; if not, install it securely. * Avoid keeping rice warm for more than 12 hours. * A faulty side heater could be the cause, requiring replacement. * The thermistor assembly might be faulty, necessitating replacement. * A faulty PCB assembly could also be the problem, in which case the PCB assembly should be replaced.
  • M
    Misty NunezAug 27, 2025
    What to do if my Sharp Rice Cooker is not cooking rice evenly?
    • J
      joelgeorgeAug 28, 2025
      If your Sharp Rice Cooker is not cooking rice properly, consider these possible causes: * Ensure you are using the correct amounts of rice and water. * Make sure the lid is closed tightly; repair it if necessary, or close it tightly. * Ensure the lid cap is securely installed. * Check for any foreign matter on the top surface of the cooking heater assembly and/or the bottom surface of the inner pot; remove any foreign matter or replace faulty parts as needed.
  • C
    Christopher WalkerAug 31, 2025
    Why does my Sharp Rice Cooker warm function make the rice watery, sticky, yellowish or give it a strange smell?
    • T
      Timothy JonesAug 31, 2025
      If the warm function on your Sharp Rice Cooker is causing the rice to become watery, sticky, yellowish, or develop a strange smell, consider these factors: * Ensure the lid is tightly closed; if not, repair the lid or close it tightly. * Avoid keeping rice warm for an extended period of time. * Stir the rice after cooking. * A faulty side heater or its installation might be the cause, requiring replacement of the side heater. * A faulty harness of the side heater could also be the issue, necessitating replacement of the side heater. * The thermistor assembly might be faulty, requiring replacement. * A faulty PCB assembly could also be the problem, in which case the PCB assembly should be replaced.
  • M
    Michelle ShieldsSep 3, 2025
    Why is there water condensation on the inner lid of my Sharp KS-COM18?
    • C
      Carla ChavezSep 3, 2025
      If you notice water condensation on the inner lid of your Sharp Rice Cooker after cooking or while keeping rice warm, consider the following: * Ensure the lid is tightly closed; if not, repair the lid or close it tightly. * A faulty lid heater or its faulty installation could be the cause, requiring replacement of the lid heater. * Faulty wiring of the lid heater might be the problem, so repair the wire. * A faulty harness of the lid heater could also be the issue, necessitating replacement of the lid heater. * A faulty PCB assembly might also be the cause, in which case the PCB assembly should be replaced.
  • R
    rburgessSep 6, 2025
    Why is the warm function not working on my Sharp Rice Cooker?
    • A
      Alec JohnsonSep 6, 2025
      If the warm function on your Sharp Rice Cooker isn't working, consider these possible causes: * A faulty side heater or its faulty installation could be the issue; in this case, repair the side heater. * Faulty wiring of the side heater might be the problem, so repair the wire. * A faulty harness of the side heater could also be the cause, necessitating replacement of the side heater. * The thermistor assembly might be faulty, requiring replacement. * A faulty PCB assembly could also be the problem, in which case the PCB assembly should be replaced.
  • A
    allison53Sep 9, 2025
    Why are some keys on my Sharp Rice Cooker not working?
    • S
      sanchezmarcoSep 9, 2025
      If some keys on your Sharp Rice Cooker are not working, consider the following potential causes: * Faulty outer frame and PCB assembly parts or a faulty key top might be rendering the keys inoperable; in this case, repair the assembly or replace faulty parts. * A faulty PCB assembly could also be the issue, necessitating its replacement.
  • D
    Daniel StewartSep 12, 2025
    Why is the timer on my Sharp Rice Cooker not working correctly?
    • H
      holtchristinaSep 12, 2025
      If the timer operation on your Sharp Rice Cooker is faulty, meaning it's not operating as programmed, consider these possible causes: * Faulty wiring could be the issue, so repair the wire. * A faulty PCB assembly might also be the cause, necessitating its replacement.
  • G
    gabriel09Nov 18, 2025
    What to do if my Sharp Rice Cooker is not operating and the keys are inoperable?
    • E
      Emily PerezNov 18, 2025
      If your Sharp Rice Cooker isn't operating and the keys are inoperable, here are a few things to check: * Ensure the power cord is properly plugged into the a.c. outlet; if not, plug it in. * There may be faulty wiring of the cooking heater or thermistor assembly, in which case you should repair the wire. * A faulty harness of the cooking heater or thermistor assembly might be the problem, so consider replacing the faulty part. * There could be an open circuit in the power cord or a faulty cord reel, requiring replacement of the cord reel assembly. * A blown temperature fuse could also be the cause, so replace the thermistor assembly and any other faulty parts. * A faulty outer frame and PCB assembly, or a defective key top causing keys to remain depressed, might require repair...

Summary

IMPORTANT SAFEGUARDS

GENERAL SAFETY RULES

Essential safety precautions and guidelines for using the electrical appliance.

PRECAUTIONS

OPERATIONAL PRECAUTIONS

Important points to observe before and during the operation of the rice cooker.

WIRING AND CIRCUIT DIAGRAMS

WIRING DIAGRAM

Schematic showing the electrical connections between components.

CIRCUIT DIAGRAM

Detailed layout of the electronic circuitry for the rice cooker.

SCHEMATIC DIAGRAM

SCHEMATIC REPRESENTATION

A visual representation of the appliance's electrical schematic.

EXPLANATION OF CIRCUIT

BLOCK DIAGRAM

Overview of the functional blocks and their interconnections within the circuit.

COOKING;WARMING TEST METHOD

SIMULATED COOKING TEST

TEST METHOD AND JUDGING CRITERIA

ACTUAL RICE COOKING TEST

Method for testing the cooker with actual rice and judging the results.

WARMING TEMPERATURE MEASUREMENT

BEFORE CALLING FOR SERVICE

PROBLEM CHECKLIST

A checklist to help identify problems by comparing symptoms with potential causes.

SERVICING AND INSPECTION

SERVICING PRECAUTIONS AND TOOLS

POST-REPAIR INSPECTION

Essential tests and checks required after completing repairs.

TROUBLESHOOTING GUIDE

BODY CIRCUIT SIDE PROBLEMS

Troubleshooting for issues related to the main body circuit and its components.

KEY INOPERABILITY AND TIMER FAULTS

COOKING AND WARMING FUNCTION ISSUES

Resolving problems related to the cooking and warming functions.

WARMING TEMPERATURE ISSUES

Addressing problems associated with incorrect warming temperatures.

Sharp KS-COM18 Specifications

General IconGeneral
Capacity1.8 liters
Keep Warm FunctionYes
Inner Pot MaterialNon-stick coating
Voltage220-240V
Frequency50/60Hz
MaterialPlastic
FeaturesAutomatic cooking, detachable power cord

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