Sharp KS-M102 User manual

SHARP CORPORATION
SHARP SERVICE MANUAL
TABLE OF CONTENTS
IMPORTANTSAFEGUARDS.......................................................................................................
PRECAUTIONS............................................................................................................................
NAMEOFPARTS ........................................................................................................................
SPECIFICATION..........................................................................................................................
PARTSPECIFICATION................................................................................................................
CAUTIONS...................................................................................................................................
CIRCUITDIAGRAM.....................................................................................................................
EXPLANATION OF CIRCUIT ................................................................................................
HOW TO ADJUST THE CLOCK ...........................................................................................
REPLACING METHOD FOR MAIN PARTS ...........................................................................
CAUTIONS IN ASSEMBLY ..................................................................................................
COOKING/WARMING TEST METHOD .................................................................................
INSPECTION AND OPERATION CHECK ..............................................................................
BEFORE CALLING FOR SERVICE ......................................................................................
SERVICING .......................................................................................................................
POST-REPAIR INSPECTION ...............................................................................................
TROUBLESHOOTING GUIDE ..............................................................................................
SERVICE PARTS LIST ........................................................................................................
Page
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12-16
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19-20
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23-25
26-30
ELECTRONIC JAR RICE
COOKER/WARMER
MODELS KS-M102
KS-M182
In the interests of user-safety (Required by safety
regulationsinsomecountries) the set should be restore to
its original condition and only parts identical to those
specified should be used.

When using electrical appliances, basic safety precautions should always be followed, including the following.
1. Read all instructions.
2. Do not touch hot surfaces. Use handles or knobs.
3. To protect against electrical shock, do not immerse cord reel or body in water or other liquid.
4. Close supervision is necessary when the appliance is used by or near children.
5. Unplug from outlet when not in use and before cleaning.Allow to cool before putting on or taking off
parts.
6. Donotoperatetheappliancewithadamagedcordorplug or after the appliance malfunctions or has
been damaged in any manner.
7. The use of accessory attachments not recommended by SHARP may cause injuries.
8. Do not use outdoors.
9. Do not let cord hang over edge of tables or counters or touch hot surfaces.
10. Do not place on or near heat sources such as a gas or electric burner or in a heated oven.
11. Extreme caution must be used when moving an appliance containing hot food, water or other hot liquids.
12. To disconnect, press the “WARM/CLEAR” button, then remove plug from wall outlet.
13. Do not use the appliance for other than intended use.
IMPORTANT SAFEGUARDS
1. Use the rice cooker on a 220V 50Hz, a.c. only protected electrical supply.
2. Be sure to remove the sheet of protective paper located between the inner pot and heater plate
before using the rice cooking.
3. Avoid using the rice cooker, if the power supply cord becomes hot. Should this happen, have a qualified
electrician check the rice cooker.
4. Use on a flat, stable surface.
5. Usetheinnerpot only in the rice cooker; neveron the range top or in themicrowave oven.
6. Do not turn the rice cooker on without both rice and water in the inner pot.Avoid using the rice cooker to
heat just water.
7. Do not touch the steam vent or surrounding area on the top of the rice cooker or heater plate either during
or immediately after use as it is very hot and could cause burns.
8. Do not put anything on the lid during cooking.
PRECAUTIONS
2

NAME OF PARTS
Body
Key sheet
Latchbutton
Inner pot
Lid cover
3
Inner lid packing
Steamcap
Inner lid
Innerpothandle
Handle
Panelring
OPERATION BOARD
DISPLAY
WARM/CLEAR
BUTTON
WARM LAMP
PRESETBUTTON
MENU LAMP
MENU(COOK)
BUTTON
MINUTEBUTTON
HOURBUTTON PRESETLAMP
Thermisterplateass’y
Powercord
Lid
Lidcap

Approximately one watt of power is consumed even when the rice cooker is in OFF mode as long as it is
pluggedin.Toconserve,unplugwhennotin use.
Duringwarmingthepowerin the parentheses is the averagepowerataroomtemperaturreof20oC.
SPECIFICATION
Model
A.C. Line Voltage (V/Hz)
Power consumption
Rice cooking (W)
Warming maximum (W)
Warming (average) (W)
Timer Type
Settingrange
Display
Cooking method
Outsidedimensions
(mm.)
KS-M102 KS-M182
220 / 50 a.c. only
625 830
93 118
(approx. 28) (approx. 40)
Present time to finish
1 to 24 hours
Processdisplayofclock/cooking/warming
Direct heating type
Width
Depth
Weightofproduct(approx.)kg
Height
Direct heating type
274 305
347
179
375
219
3.1 3.9
Safetydevice Temperature fuse; 169oC
Cooking Chart
Cookingtimeissetat specified voltage, room temperature20-25oC, watertemperature20-25oCandunder
standardwaterlevel.
Cookingtimemayvaryalittledependingonthekindorvolumeofriceandingredients,roomtemperature,
watertemperature,voltage,etc.
4
MODEL
PROGRAM
KS-M102 KS-M182
Volume of rice
(cup) Time(approx.)
(hr : min) Volumeofrice
(cup) Time(approx.)
(hr : min)
PLAINRICE
BROWNRICE
GLUTINOUSRICE
CONGEE
PORRIDGE
SLOWCOOK
MIXEDRICE
1 - 5.5 0:47- 0:55 2 - 10 0:47- 0:51
1 - 4 1:30- 2:00 2 - 7 1:35-1:52
1 - 4 0:41- 0:58 2 - 6 0:42-0:48
0.5 - 1.5 1:00 0.5 - 2.5 0:48- 1:05
0.5 - 1 1:00 0.5 - 1.5 0:50- 1:05
Dependingonthewaterquantity/seasonings / ingredients for cooking

PART SPECIFICATION
Name of part
Cord reel ass’y
Heater plate ass’y
Side heater ass’y
PCB ass’y
Lid heater ass’y
Part specification
Inner lid ass’y
Thermistor plate ass’y
Part No.
Cordlength1.03m. 21J400ASY
220V625W(ratingwattage) 21J3061ASY
Thermistor type (with connector)
Temperature fuse (169oC 10A)
21J3121ASY
Power 62W
Resistance 629.3 Ω5 %
Resistance wire spec. 850.4 Ω/m
220V
21J3031ASY
21J401ASY
Power25W
Resistance 1936 Ω5 %
Resistance wire spec. 1960 Ω/m
21J3311
Power 25W
Resistance 1936 Ω5 %
Resistance wire spec. 1959 Ω/m
21A109TASY
MODEL: KS-M102
Name of part
Cord reel ass’y
Heater plate ass’y
Side heater ass’y
PCB ass’y
Lid heater ass’y
Part specification
Inner lid ass’y
Thermistor plate ass’y
Part No.
Cordlength1.03m. 21J400ASY
220V830W(ratingwattage) 22J3061ASY
Thermistor type (with connector)
Temperature fuse (169oC 10A)
22J3121ASY
Power77W
Resistance 484 Ω5%
Resistance wire spec. 547.2 Ω/m
220V
22J3031ASY
22J401ASY
Power 30W
Resistance 1613.3 Ω5 %
Resistance wire spec. 1210 Ω/m
22J3311
Power 30W
Resistance 1613.3 Ω5 %
Resistance wire spec. 1210 Ω/m
22A109TASY
MODEL: KS-M182
5

1. Place of use
To prevent fire or shock hazard do not place unit on or near heat sources such as a gas or electric oven
or grill.Also, do not use near water, for example near a kitchen sink, swimming pool, in a wet basement
and the like.
Do not use the rice cooker within 1 m of TV or radio to prevent the interference.
2. How to handle before use
Never overhaul for repair.
The electrical requirements are a 220V 50Hz, a.c. only protected electrical supply.
It is recommended that a separate circuit serving only this appliance be provided.
Never immerse the rice cooker in water or splash water on the unit.
There is a risk of electric shock.
Do not allow children to operate.
When you carry the rice cooker, use the handle with the lid close.
Never carry it by using of the inner pot holders projecting on both sides of the closed cooker.
Use the plastic spoon provided as accessory.
Forporridgeuseaplastic or wooden deep plastic spoon available on the market.
3. How to use it
(1) Before cooking
Do not use the inner pot for washing rice.
Wash rice quickly and thoroughly.
Insufficient washing will cause scorching and odor.
Use clean, clear water.
Do not use any inner pot other than the exclusive one.
The water level marking is a standard guide and may be adjusted slightly depending on the kind of
rice or your liking. Remember that adding too much water may cause boiling over.
Carefully align marks when replacing the steam cap in the lid.
Foreign matter adhered to the outside of the inner pot, heater plate and thermistor plate must be
washed off before use. If not, it may cause inadequate cooking or a damage of the rice cooker.
Rice with ingredients containing seasonings should not be cooked by using delay start setting.
Because the settling or decay of the seasoning is likely to cause inadequate cooking.
Hints for determining the amounts of ingredients and seasonings :
The amounts of rice and seasonings that can be cooked vary depending on the menu.
Astandard for the amount of ingredients is 30-50 % of the mass of rice to be cooked, but follow
the amounts given 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.
CAUTIONS
6

7
(2) Cooking rice
During cooking rice clicking sound is heard but this is due to ON-OFF action of the relay and quite
normal.
During the cooking of the rice, a fizzing sound may be heard, This is due to the remaining water on
the outside of the inner pot and is not a problem.
During cooking do not open the outer lid.
There is a risk of boiling over or inadequate cooking and burns.
Do not touch the steam vent.
It may cause burns.
Do not put anything on the lid.
It may cause the damage to the operation board and the deformation and/or discoloration of the lid.
Stir rice well using the plastic spoon provided within 30 minutes after cooking.
It will allow escape of the excessive steam and fluffy appearance of the cooked rice will result.
Immediately after cooking some sticky film may be formed in the surface of the cooked rice with the
central portion sunken but this means no problem. This is phenomenon called spherical cooking.
In the follwing cases heavy scorch may occur.
When rice washing is insufficient.
When the rice is soaked in water for a long time.
When rice other than plain rice is cooked with seasoning (especially sake, sugar, ketchup,
tomato-puree and etc.).
(3) Warming
Because to keep the lid closed even at meals.
Use for 12 hours or less for best results.
Avoid using for a small amount of rice.
Usefor keeping warm rice warm, the setting is notintendedto be used for refrigerated or room
temperature rice.
Use for keeping plain rice warm.
Do not keep rice warm with any utensil, such as the plastic spoon, in the rice.
(4) After use
Press the “WARM/CLEAR” button, then remove plug from wall outlet.
After use wash the inner pot and the steam cap as soon as possible.
Otherwise, corrosion 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 steam cap is thoroughly washed and immerse in hot water for 30-60 min.
And then wipe off water thoroughly with dry cloth and disinfect by sunlight sufficiently.
Be careful to plastic parts because they are easy to deform by heat.
Wipe the inside lid, inside body heater plate and thermistor plate using a slightly damp detergent
cloth.
And then disinfect; by sunlight for a couple of hours. Never wash the cooker or the lid with water.

8
CIRCUIT DIAGRAM

9
SCHEMATIC DIAGRAM
PCB ass’y

10

EXPLANATION OF CIRCUIT
BLOCK DIAGRAM
VDDPowersupply
circuit
11
VRPowersupply
circuit
LSI-1
Powersupplyfrequency
SYNCsignalgenerating
circuit
Modelchange
Warm temp.
controlvaried
circuit
ACvoltageditector
circuit
Cookingheater drive
circuit
Warmingheater drive
circuit
VREFPowersupply
circuit
Temp.ditector
circuit
TH71
Room temperature thermistor
TH1
Thermistor plate ass’y
Reset signal supply
circuit
HOW TO ADJUST THE CLOCK
1. Connect the power supply cord to outlet electric
wall.
2.PresstheHOUR button or press MINUTE button
for more than 1 second, the clock display blink.
3. PresstheHourbuttonorpresstheMINUTE
button to adjust the clock.
If the button is hold down and not released the
clock changes continuous.
The clock display flashes 5 second to
unflashes, will be clock adjusting is complete.
Thermistor
temperature
(oC)
Thermistor
resistance
(kΩ)
TH71 TH1TH71
-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
MODELNAME MODELCHANGE
KS-M102
KS-M182
R76 10k
OPEN R77
10k 12k

REPLACING METHOD FOR MAIN PARTS
12
REMOVE OF CORD REEL ASS’Y
1. Remove the 4 screws fixing the body. (Fig. 2.)
2. Removethebodyfrom the panel ring.
3. Removethecordreelfromthebody,anddisconnectleadwirefrom the cord reel.
4. Now the cord reel is free.
Themethodofremovingthese wires is shown.
REMOVEOFBODY
1. Turn the rice cooker upsidedownandremove the 4 screws fixing the body.
2.Removethebodyfromthepanelring.
3.Removethecordreelfromthebody.
4.Removethenutholdingleadwireearthwith the body.
5. Now the body is free.
Fig. 2.
Screw
Body
REMOVEOFLIDASS’Y
1.Removethe body in accordance with “REMOVE OF BODY”.
2.Disconnectlead wire from PCB ass’y and remove the screwholdingleadwire earth from outer pot.
Screw Outerpot
With this claw being
pressedinward
PCB ass’y
Innerlidleadwire connector
Fig. 3.
Fig. 1.

3. With the lid held with a handle, first release the latch button and open it to a normal degree, at which
the lid first stops.(Fig. 4.)
4. Press the both sides of the lid assembly outward at the claws and to release.
5. Unlock the lid from claw by pull the lid up.
6. Now the lid ass’y is free.
Fig. 4.
13
REMOVEOF LIDCOVER
1. Removelidinaccordancewith“REMOVEOFLIDASS’Y”.
2. Close the lid cover. Push on the hinge pin, and using the pilers or similar to pull out from lid cover.
3. Pull out further the lead wire PCB and lead wire earth.
4.Remove6screwsandremove the inner lid from lid cover.
5. Now the lid ass’y is free.
Innerlidfixingscrews
Fig. 5.
Pliers
Hingepin
Push
Lid
Claw
Claw A
A
B
Lidcover
B
A B
Claw C
C

Theinnerpotshouldbeinthepositiontopreventtheheaterplatefromfallingwhenremoving3screws.
Heaterplatefixingscrews
Innerlidleadwire connector
Thermistorfixingtab
Fig. 7.
14
CAUTION
Leadwire
1
2
3
4
5
6
7
REMOVEOFHEATERPLATEASS’Y
1. Removethebodyinaccordancewith“REMOVEOFBODY”.
2. Disconnect all lead wires of heater plate from the PCB ass’y. (Fig. 7.)
3. The heater plate ass’y comes off by removing 3 screws. (Fig. 7.)
4. Now the heater plate ass’y is free.
Leadwiresoflidheater
Fig. 6.
CAUTION
When assembling, be sure not to catch the lead wires for the inner lid heater.
As shown in Fig. 6, the lead wires of the lid heater are to be passed under the rib of the lid cover
and passed above the hinge pin.
After assembly, make sure not to have deformation of inner lid packing. Otherwise, it may cause
steam leakage.

REMOVEOFTHERMISTORPLATEASS’Y
1. Removethebodyinaccordancewith“REMOVEOFBODY”.
2. Disconnect all lead wire from the thermistor plate ass’y to PCBASS’Y.
3. Unbendtheleadwirebandbounding all the lead wire.
4. Remove the heater plate ass’y in accordance with “REMOVE OF HEATER PLATEASS’Y”.
5. Twist 2 claws of thermistor plate ass’y.
6. Now the thermistor plate ass’y is free.
15
DISENGAGEPCBASS’Y
1. Removebodyinaccordancewith“REMOVE BODY”.
2. Disconnect all the lead wires of PCB ass’y.
3. Settheouterframetowardyou.
4. Peel off the key sheet.
5. Remove the 3 screws fixing the PCB ass’y to the body. (Fig. 8.)
6. Now the PCB ass’y is free.
PCB ass’y fixing screws
Fig. 8.
Always replace the display cushion because it may be damaged.
CAUTION
Fig. 9.
1. Removebodyinaccordancewith“REMOVEOFBODY”.
2. Removethethermistorplateass’y.
3.Turningtheouterpotcounterclockwise.
4. Now the outer pot is free.
REMOVEOF OUTERPOT
Outerpot

16
REMOVEOFLATCHBUTTON
1. Insert a putty knife into the gap between a latch button and panel ring.
2. Push the latch button down toward the hinge side pushing a putty knife outward. (Fig. 10.)
3. Thelatchbuttonandthelatchspringaredisengaged.
Fig. 10.
CAUTIONSINASSEMBLY
1. Setting cord reel ass’y.
Be sure to set the cord reel lead wires (blue/black) 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.
Wheninstallingthebody,makesureinternalleadwiresarenotroutedoverthespacerbefore
tighteningscrews(4).

COOKING/WARMING TEST METHOD
When rice cannot be cooked well (resulting in marked scorching or undercooking), a temperature test may be
done in the following way.
1. Simple test method (Simulated rice cooking)
(1) Test conditions
1. Power voltage 220V.
2. 90 mL (1/2 of the measuring cup provided as accessory) of water is poured into the inner pot.
(Water temperature may be close to the ambient temperature.)
3. The ambient temperature may be 20-30 OC.
4. The rice cooker is required to be sufficiently cool. (The temperature of the cooker and the bottom
temperature sensor reading shall be close to the ambient temperature.)
5. The rice cooker shall be put on a level place.
6. The steam vent cap shall be fixed properly.
(2) Test method
1. Pour the designated amount of water into the inner pot, close the lid, press the cooking key and
measure the time required for completion of cooking.
2. Open the lid when steam come out through the vent and confirm the bubbling condition on the
bottom of the inner pot. (Confirm that the inner pot is stabilized in close contact with the heater plate.
This confirmation shall be done quickly lest it should influence the “operating time”.)
Note
If confirmation of bubbling is difficult, it is easy that a separate test may be done with 180 mLof water.
3. If the bubbling condition is good, close the lid again and energize.
4. Immediately after 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 the periphery
of the inner pot as shown in Fig. (A).
If as in Fig. (B), bubbling is absence more than 1/3 of the pot
periphery, foreign matter adhesion to the heater plate or
deformation or flow of the inner pot are supposed.
(If adherence of foreign matter is the case, things may be
the inner pot is deformed, replacement with a new inner pot
is recommended, the same being the case when the heater plate
is deformed.)
2. There is no residual water in the inner pot or a very small
amount of water (approx. 20 mL) is remaining in the recessed
part of the inner pot bottom when the lid is opened immediately after completion of cooking.
3. When the time from start of cooking to completion thereof is:
1.0L 475 min.
1.8L 475 min.
This is nothing more than a simple test and the time of cooking completion may vary depending on
test condition such as difference between the water temperature and ambient temperature or the
amount of water.
If the test result is marginal such as when only slightly longer than above mentioned completion time,
actual rice cooking test is recommended.
Bottom of the inner pot
Fig. (A) Fig. (B)
Bubble
Good bubbling
condition Bad bubbling condition
17

2. Actual rice cooking test method
(1) Test conditions
1. Power supply voltage ...... 220V.
2. 2-cup of “PLAIN RICE” cooking.
3. Ambient temperature 20 - 30oC.
4. Standard water level according to water level scale.
(2) Judging criteria
1. Each indicator shall be switched over as follows.
“PLAIN RICE” indicator lights.
“WARM” indicator lights.
“Warming” is continued.
2. Check the degree of rice scorching on the bottom of the inner pot.
Slight scorching............Normal.
Excessive scorching ......Thermistor plate ass’y or PCB ass’y is faulty.
3. Warming temperature measuring method (when room temperature is approx. 20oC)
(1) With the inner pot empty, put a bar thermometer
100oC in full scale in the inner pot and close the lid.
Pressselect“PLAINRICE”programand
afterenergizingabout2minutesthe“WARM/CLEAR”
button is pressed to [cancel].
Then press the “WARM/CLEAR” button to select
“warming”andcontinue warming for about1hour.
(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 heater plate ass’y and thermistor ass’y)].
Remember that with a bar thermometer available on the market there is a permissible error of
1 degree or so.
Warming temperature 70-76oC
Jig made of a chip
of packing case.
Approx. 30 mm.
100oC bar
thermometer
Inner pot
18
Check the temperature quickly because the reading of the thermometer falls rapidly with the lid open.
The bar thermometer is to be elevated from the inner pot bottom using a chip of packing case lest it
should come into direct contact with the inner pot.
CAUTION

19
INSPECTIONANDOPERATIONCHECK
The operating conditions of rice cooker can be checked in the test mode.
If a malfunction is generated during the inspection conducted according to this check list, inspect the unit by
referring to the “TROUBLESHOOTING GUIDE”.
Operation Check
No. 220V. AC
Power
supply
Switch on
Key sheet
Remark
Fit inner pot OUTPUT
GLUTI-
NOUS
1. 220V ON
A plug is
inserted with
key of the
timer and Cook
Menu pushed
at the same
time.
About 0 W
Electric power
meter isn’t to
work.
2.
MIXED
RICE
POR-
RIDGE
DESSERT
SLOW
COOK
M102
M182
Display
: Lighting
PLAIN
RICE
WARM
CLEAR
PRESET
Red Red Red Red Red YELLOW GREEN
Release key
Push key of
Rice cook,
menu. (COOK)
Release key
3.
Push key of
Rice cook,
menu. (COOK)
Release key
4.
It is turned on around all LED.
570~
640 W Measure it within four seconds.
Consumption
electric power of
rice cook.
770~
850 W
80~
110 W 110~ 137 W
5.
Push key of
[HOUR] or
[MINUTE] for
set value of
HOUR “Up”
and “Down”
follow present
time.
Push key of
Rice cook,
menu. (COOK)
Release key
6.
Settimer“HOUR”
button.
Push key of
[PRESET].
Change to set
timerfrom“HOUR”
to“MINUTE”
button.
7. Push key of
[HOUR] or
[MINUTE] for
set value of
minute “Up”
and “Down”
follow present
time.
Set timer
“MINUTE”button.
8.
Push key of
[PRESET]
Come back to
modeTIMER set.
Consumption
electric power of
keeping warm.
Check of enter
the key and
lighting of LED.

20
Operation Check
No. 220V. AC
Power
supply
Switch on
Key sheet
Remark
Fit inner pot OUTPUT
GLUTI-
NOUS
MIXED
RICE
POR-
RIDGE
DESSERT
SLOW
COOK
M102
M182
Display
: Lighting
PLAIN
RICE
WARM
CLEAR
PRESET
Red Red Red Red Red YELLOW GREEN
9.
Push key of
[WARM/
CLEAR]
TIMERisoperate
(Colonblink)
10.
Power SW :
OFF
After 2 seconds
LCD is indication
present time and
operate with
battery.
(Colon not blink)
Note : The 220 V a.c. power supply using a stabilized power supply.
(Reason : If the primary voltage is not decided properly. The A/D vale indication error occurs and the operation test No.2 LED
Red at menu “GLUTINOUS” rice is blink.