43827101TH Rev.2 36 /
Oki Data CONFIDENTIAL
Error checking methods and remedial methods
The density correction test function among the other self-diagnostic functions is employed to check
errors. (Subsection 5.3.2.7)
Remedial methods against different errors
• CALIBRATION ERR, DENS SENSOR ERR
Check 1: If the above indication appears, check the connected state of the sensor cable.
If the connected state is found abnormal, restore it to the normal state.
Check 2: Check to see whether the sensor surface is stained with toner, paper dust or any
other foreign matter.
If it is found stained, wipe it clean.
• DENS SHUTTER ERR
Check 3: Check to see whether the sensor shutter opens and closes normally, by the
MOTOR & CLUTCH TEST of the self-diagnostic function. If the shutter operates
imperfectly, replace the shutter unit.
• DENS ID ERR
Check 4: Take out the ID unit and examine it to see if the drum surface has any abnormal
toner smudge.
Replace the LED head (Blurred focus), or replace the ID unit.
To test-operate a new ID unit, use the Fuse Keep Mode of the maintenance
menu.
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