Oki OKIFAX4550 Maintenance Manual page 247

Troubleshooting flow chart 2:
Warning message to replace
** CHANGE DRUM SOON **
41309401TH Rev.4
ID unit because of its life.
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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