Table 7-28

White or Blank Pages

 

 

 

 

Possible Cause

Action

 

 

 

 

Defective laser shutter.

Check the laser shutter for free operation

 

 

when inserting the EP Toner Cartridge.

 

 

 

EP Cartridge Support damaged,

Refer to item 4 in Figure 8-4a. Guide

improperly positioned, or missing.

must be installed properly above the EP

 

 

Cartridge, between the laser shutter

 

 

opening and the fuser stop plate.

 

 

 

Toner Cartridge. No toner is available

forRemove sealing tape or replace the

print.

 

Toner Cartridge.

 

 

 

No Transfer Roller voltage. Without

Perform the“Half Self Test Functional

transfer charge roller voltage, toner

Check” which follows to check all other

cannot be attracted from the surface of

electro-photographic processes.

the drum to the paper.

 

 

 

 

 

No Developing Bias. With no Developing

Refer to “High Voltage System Checks.”

Bias charge, toner is not attracted to the

 

 

drum.

 

 

 

 

 

 

No drum ground path. With no ground

Refer to “High Voltage System Checks.”

path the drum cannot discharge. The

 

 

negative charge on the drum repels

 

 

toner, and leaves a white page.

 

 

 

 

 

Bad Laser Scanning Cable Assembly.

Replace the Laser/Scanning Cable

Low-level signals exchanged between

Assembly.

the Laser/Scanning Assembly, and the

 

 

DC Controller may be affecting laser

 

 

output.

 

 

 

 

 

 

 

7-48 Troubleshooting