Oki c5550 Maintenance Manual page 34

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.
Check 2: Check to see whether the sensor surface is stained with toner, paper dust or
• DENS SHUTTER ERR
Check 3: Check to see whether the sensor shutter opens and closes normally, by the
• DENS ID ERR
Check 4: Take out the ID unit and examine it to see if the drum surface has any abnor-
44158801TH Rev.2
If the connected state is found abnormal, restore it to the normal state.
any other foreign matter.
If it is found stained, wipe it clean.
MOTOR & CLUTCH TEST of the self-diagnostic function. If the shutter oper-
ates imperfectly, replace the shutter unit.
mal 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.
Oki Data CONFIDENTIAL
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