Table 7-12

Black Pages

 

 

 

 

Possible Cause

Action

 

 

The HVPS connections are dirty.

Clean the HVPS terminals (see Figure

 

 

7-18 for layout).

 

 

The HVPS is installed improperly. If the

Remove the HVPS, and check the

HVPS has been removed and replaced,

connectors for damage. Reseat the

it may not be seated properly.

HVPS, being certain to fully seat the

 

 

connectors.

 

 

Bad Primary Charging Roller.

Replace the Toner Cartridge.

 

 

The HVPS is defective.

Replace the HVPS.

 

 

DC Controller PCA. The laser drive

Replace the DC Controller PCA, followed

circuitry is damaged so that the laser is

by the Formatter PCA if required.

always on.

 

 

 

 

 

Table 7-13

 

Any Faint Print Condition

 

 

 

 

 

Possible Cause

Action

 

 

Printer set to Economode.

Change driver and/or Control Panel

 

 

settings to ECONOMODE=OFF.

 

 

 

Toner Cartridge.

 

Replace the Toner Cartridge.

 

 

Print density set improperly. The higher

Set the print density to a darker level.

the print density setting, the more toner

Replace the high voltage power supply if

transferred to the drum.

this has no effect.

 

 

The paper finish, conductivity, or

Try a known good source of paper from a

moisture content may not be suitable for

freshly opened package. Refer to the HP

the electro-photographic printing process.

LaserJet Family Paper Specifications

 

 

Guide for media specifications.

 

 

The transfer roller may be defective.

Replace or reseat the roller.

 

 

Weak or no developer bias. If

Adjust the print density setting as shown

inadequate, or no developer bias is

in Chapter 3.

produced, toner is not attracted to the

 

image written on the drum.

 

 

 

 

7-38 Troubleshooting