Troubleshooting - Sharp KSH-777DW Service Manual

KSH-777DW
Those marked with black spots ( ) are often confused with troubles. Give the customers proper operating instructions.
1. Trouble during Cooking
PROBLEM
Indicator light will not
go ON.
Unable to cook
Indicator light will go
ON.
Poor finish of cooked
rice (Local uneven-
ness of cooked rice is
Capable of cooking
excessive. Core is left
but insufficient.
in rice grain due to
early switch OFF.
Excessively over-
done bottom layer or
rice mass. (Overdone
layer in light brown is
not regarded as ab-
normal.)
2. Trouble during Warm-keeping (Capable of cooking)
PROBLEM
Unable to keep warm
3. Other Trouble
Indicator light flickers.
Affected by electric shock from cooker
body at a touch

TROUBLESHOOTING

POSSIBLE CAUSE
Cooking switch kept "OFF".
Disconnected plug cap.
Broken power cord assembly.
Faulty or loose wiring.
Maladjustment switch assembly.
Burn out of heating plate wire.
Faulty wiring.
Improper quantity of rice or water.
Faulty tightness due to deformed
heating plate or inner bowl bottom.
Faulty tightness due to contaminants,
etc. deposited on heating plate or inner
bowl bottom.
Faulty in setting lid.
Faulty thermostat
Malfunction of thermostat due to
vibration or impact.
Faulty interlocking of switch assembly
and thermostat.
Insufficient maintenance of inner bowl
or washing of rice.
Improper operating temperature of
thermostat.
Maladjustment switch assembly
(Cooking will not go OFF.)
Cooking has been carried on by
depressing the switch button forcibly
with chopsticks, etc.
POSSIBLE CAUSE
Disconnected plug cap.
Maladjustment switch assembly.
Faulty or loose wiring.
Faulty warm thermostat assembly.
Faulty receptacles. (Contact failure
with plugs).
Nearly broken or contact after
breakage of cord.
Loose wiring.
indicator light
Faulty or resistor.
Maladjustment switch assembly.
Faulty insulation of heater plate
assembly, micro switch assembly,
power supply cord, etc.
Water soaked, cooker body, etc.
6
CORRECTIVE ACTION
Cooking switch "ON".
Plugged into the outlet.
Repair or replace power cord assembly.
Repair or replace faulty parts.
Repair or replace it.
Replace heating plate.
Repair or replace faulty parts.
Advise proper operating instruction.
Replace inner bowl or faulty parts.
Remove contaminants or replace parts
having contaminant deposits.
Advise proper operating instruction.
Replace thermostat.
Advise proper operating instruction.
Repair.
Advise proper operating instruction.
Replace thermostat. (No adjustment of
operating temperature is made possible.)
Repair or replace faulty parts.
Advise proper operating instruction.
CORRECTIVE ACTION
Plug into the outlet.
Repair or replace.
Repair or replace faulty parts.
Replace warm thermostat assembly.
Repair receptacles.
Replace power cord supply.
Repair.
Replace faulty parts.
Adjustment switch assembly.
Replace faulty parts.
Replace faulty parts after drying.