Oki OKIFAX 5400 Maintenance Manual page 226

Troubleshooting flow chart 2:
Warning message to replace
40838301TH Rev.1
ID unit because of its life.
** CHANGE DRUM SOON **
Turn on power again.
Does the CHANGE
DRUM SOON message
remain on display?
Yes
Is the MCNT Board
mounted properly?
Yes
See ACTION 4.
No
See ACTION 3.
No
Mount it properly.
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