Oki MC770 series Maintenance Manual - page 150

45376001TH  Rev.1 

149 /

Oki  Data  CONFIDENTIAL

7. Troubleshooting and repair procedure

7.1  Before starting the repair work

(1)  Confirm the basic check/inspection points described in User’s Manual. 

(2)  Get the information/status from client at the time when the trouble has occurred 

as much in details as possible 

(3)  Create the status close to the user’s status when the trouble has occurred, and 

inspect a printer in that status. 

7.2  Confirmation items before taking corrective action against abnormalities 

(1)  Is the usage environment of a printer normal?

(2)  Are the consumable items (toner, drum cartridge) replaced normally?

(3)  Is the print media (paper) normal? Refer to Specifications – Paper in User’s 

Manual. 

(4)  Is the drum cartridge installed normally?

7.3  Precautions when taking corrective action against abnormality

(1)  Do not touch the OPC drum surface with your hand or any foreign materials. 

(2)  Do not expose the OPC drum to the direct sunlight. 

(3)  The fuser unit will be hot. Do not touch. 

(4)  Do not expose the image drum to any light for 5 minutes or longer under the 

normal room temperature. 

7.4  Preparation for troubleshooting

(1)  Display on the Operator Panel

Error status of this printer is displayed on the LCD (Liquid crystal display) of the 

Operator Panel. 

Take appropriate troubleshooting action in accordance with the message 

displayed on the LCD.