I have this Panasonic fuzzy logic rice cooker. The clock just stopped working because the lithium battery was depleted. Normally, you can unplug the power cable and the clock still displays the time. The rice cooker still works.
How do you change the battery?
unplug rice cooker
open the case up and find the electronic board
find the battery (if you can't find it, take a few photos of the board and send it to me; or remove the board from the cooker and take it to Lee's electronics...make sure you label the wirings)
remove the battery from the board,
read label of the battery and use voltmeter to find the voltage
get a new one or a compatible one
reinstall the battery onto the board.
put everything together
check the clock (even if the battery is rechargeable, the new battery should have enough power to light up the clock)
close the casing.
plug in the cooker.
some water in it to dry run it.
Questions? ask Lee's electronics ....since it is hard to tell over the internet.
First law: Every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force.