Table 7-22Black Pages with Horizontal White Strips

Possible Cause

Action

 

 

Laser/Scanning Assembly or DC

Replace the Laser/Scanning Assembly

Controller PCA.

 

followed by the DC Controller PCA, if

 

 

necessary (see Figure 7-12 for locations).

 

 

 

Table 7-23

 

 

Image Skew

 

 

 

 

 

 

Possible Cause

Action

 

 

Input/Registration Sensor (PS1). The

Replace the Input/Registration Sensor.

Paper Pickup Roller positions the leading

Skew tolerance for the printer is 1.5mm

edge of the paper at the

over 260mm page length.

Input/Registration Sensor (PS1). If this

 

sensor is defective it may not sense the

 

presence of the paper reliably (on time).

 

 

 

Drive Gears. If any gear within the gear

Closely examine the gears along the

drive train becomes excessively worn, or

paper path for wear and contamination.

is excessively dirty, erratic paper

Clean and inspect the gears. Replace

movement would result, leading to image

any defective gear.

misregistration.

 

 

 

 

Paper Tray. The paper tray may be

Verify that the tray is loaded correctly.

preventing the paper from freely moving

Verify that the paper tray is seated fully

through the printer.

 

into the printer. Switch trays to verify that

 

 

the problem follows the tray. Replace the

 

 

paper tray.

 

 

Paper. The surface of the paper may be

Change paper. Try paper known to be

too smooth for the pickup roller to move

good.

the paper through the paper path.

 

 

 

 

Paper too heavy?

 

See Paper Specifications in Chapter 2.

 

 

 

Troubleshooting 7-43