Sharp KSH-206, Service Manual

Page: 5 / 26

5
METHOD OF OPERATION
Different degree of temperature at various parts of the cooker during its operation.
After being switch “ON” the operation will be started by generating heat from the heater plate and spread
through the bottom of inner pot. As long as there still be water in the inner pot, the temperature at the bottom will
be always lower than 100
C.
When rice at the bottom is well cooked cause no more water left, then the temperature will sharply raise
up to certain level more than 100
C that the thermostat will automatically switch off the heater plate operation.
(As a whole process, it takes about 30 minutes.)
At this stage, rice at the top is not yet still well cooked, warm heater will automatically start working
consecutively after heater plate being switch off. It takes another 15 minutes until rice is completely in the proper
manners.
To repair rice cooker, the following parts should be carefully checked and / or repaired in the proper manners.
1. Inner pot.
Outer side : It must be cleaned without any contaminants and particles at the bottom for it can be firmly
contacted the heater plate evenly.
Inner side : It must be cleaned without dry cooked rice at the bottom, otherwise it can be the prevention of
heat transmission throughout the inner pot. And it may cause temperature at the bottom raise
up to the level which can be switched of the heater plate (as above explained) before the proper
time. So, it may cause improper rice-cooking.
2. Heater plate and thermostat.
- Ensure that there is no any contaminant or deposits on heater plate and thermostat, it will cause the operation
of switching off before the proper time.
3. Switch lever and micro switch.
- The switch lever and micro switch must be in proper alignment.
4. Cook switch.
- Cook switch must be in proper working, otherwise it may cause thermostat be unable to cut off when rice is
already cooked.
30 MINUTES
C
TEMPERATURE
TIME
THERMOSTAT CUTS OFF
HEATER PLATE
INNER POT
THERMOSTAT
RICE
100 C