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My km-2050 kyocera is not printinting its displaying c6400?

How do i mend my copier which has an error c6400
stephen, July 2012
To Enter Service Mode:
Hit the "Status" button

Hit the following sequence on the numerical keypad:
1 0 8 7 1 0 8 7

You should be in service mode.

Use U163 by typing1 6 3 and then "Start"l execute


then after executing power off then on

musisi, July 2013
link Click here to see other fixes for Kyocera KM-2050.