Troubleshooting Guide - Panasonic SR-GA421 Service Manual

3. TROUBLESHOOTING GUIDE

When receiving the cooker to be repaired, be sure to always take charge of not only the
cooker body but also the pan and the lid, and ask for details as to the symptom of the trouble.
Furthermore, when making troubleshooting of each part, be sure to remove the power plug from
the socket.
Symptom
Cooking function
● Cooking fails (Cooking
lamp is not shown)
● Cooking fails (Cooking
lamp is not shown)
● Thermal fuse blown
● Rice burns (Brown color)
Diagnosis
No continuity of cord?
No
No continuity of thermal fuse?
No
No continuity of micro switch?
No
Center thermostat is broken?
(Checked evaporation test)
No
Switch lever properly adjust?
No continuity of sheathed heater?
Forced application of current?
Center thermostat defective?
(Check with evaporation test)
No
Switch lever has been properly adjusted?
Yes
Usage correct?
● Rice is not rinced well enough?
● Using with low rated voltage?
● Too much water input for cooking?
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
7
SR-GA421/SR-GA281/SR-GA721
Remedy
● Replace AC cord.
● Locate cause for fusing and
replace fuse.
● Replace Frame ass'y.
● Replace center thermostat.
● Adjust Switch lever.
● Replace sheathed heater.
● Explain correct usage.
● Replace center thermostat.
● Adjust Lever.
● Explain correct usage.