Canon CLBP-460PS, Service Manual, Page: 300 / 566

[ 6-22 ] “REPLACE DRUM” message appears when actual expected life of the drum car-
tridge has not completed yet.
<Possible causes>
1) Defective drum cartridge memory
Action: Replace the drum cartridge.
2) Defective DC controller PCB
Action: Replace the DC controller PCB.
[ 6-23 ] “INATALL DRUM” message appears when the drum cartridge is installed
<Possible causes>
1) Poor contact in the drum cartridge memory connector
Action: Reconnect the drum cartridge drawer connector and the DC controller PCB con-
nector correctly.
2) Defective drum cartridge memory
Action: Replace the drum cartridge.
3) Defective DC controller PCB
Action: Replace the DC controller PCB.
[ 6-24 ] “NO FUSER UNIT” message appears when the fixing unit is installed
<Possible causes>
1) Poor contact in the fixing unit connector
Action: Reconnect the fixing unit connector correctly.
2) Poor contact in the DC controller PCB connector
Action: Reconnect the DC controller PCB connector J1011.
3) Defective DC controller PCB
Action: Replace the DC controller PCB.
[ 6-25 ] “WASTE TONER BIN FULL” message appears when the waste toner level is not
full
<Possible causes>
1) Defective DC controller PCB
Action: Replace the DC controller PCB.
[ 6-26 ] “CASSETTE XX EMPTY” message appears when the paper is set to specified
paper source
<Possible causes>
1) Go to step 2) if the specified paper source is the cassette, step 7) in case of the multi-pur-
pose tray, and step 12) in case of the paper feeder.
2) Damaged cassette paper detection lever
Action: Replace the lever.
3) Poor contact in the cassette paper sensor connector
4 - 46
CHAPTER 4