43827101TH Rev.2
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Oki Data CONFIDENTIAL
Error checking methods and remedial methods
The color drift correction test function among the other self-diagnostic functions is employed to
check errors. (Subsection 5.3.2.6)
Remedial methods against different errors
• CALIBRATION (L or R), DYNAMICRANGE (L or R)
Check 1: If the above indication appears, check the connected state of the sensor cable
(FFC).
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.
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.
• BELT REFLX ERR
Check 4: If this indication appears, check the cleaned state of the toner remaining on the
belt surface, in addition to making the above checks 1, 2 and 3. Take out the belt
unit, turn the drive gear located on the left rear side, and ensure that the belt
surface has been cleaned thoroughly.
If cleaning is not achieved perfectly and there still remains toner on the belt
surface after the drive gear has been turned, replace the belt unit.
• (Y or M or C) LEFT, (Y or M or C) RIGHT, (Y or M or C) HORIZONTAL
Check 5: If the above indication appears, check to see whether the toner is running short,
based on an NG-issuing color.
Replace the toner cartridge, as needed.
