HP CM1015 printing yellow pages

scanner unit problem. open and clean the mirrors and lenses with chamois/lint free cloth. if it solved OK. if not replace the unit.

According to the HP website:
"The Universal Print Driver (UPD) for the HP Color LaserJet CM1015 and CM1017 Multifunction Products might not be the best driver choice for this product because UPDs are typically print-only . There are no product-specific Windows 7 print/scan drivers available for this product.
While these products do not have a Windows 7-specific solution, you can run the HP product software created for the Windows Vista operating system on a Windows 7 PC in compatibility mode to enable full product software functionality.
This is the recommended Windows 7 solution to obtain the most software features for the HP Color LaserJet CM1015 and CM1017 MFPs."

http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c02047129-6%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken

Dirty laser unit - needs (careful) cleaning internally.

See ' Printing Weak Magenta', 'Printing Light Magenta' for HP CM1015, HP Color Laserjet 1600, 2600, 2605.

All the same laser unit

This is likley to be the common problem (with this model of printer) of the laser unit having dirty lenes and/or mirrors.

Typically the magenta is the first colour to deteriorate.

To rectify this problem there's a fair bit of dismantling to be done in order to get the laser unit out.

Then you can open the laser unit up and clean the lenses and mirrors CAREFULLY. You don't want to scratch the surface silvered mirrors, or disturb the alignment of any of the optical components.

You'll see the same problem and solution for HP1600, HP2600, and Canon LBP5000, as they all use the same laser unit.

This is a common problem on these printers.

Cause is dirty lenses and or mirrors in the laser unit.

Solution is remove laser unit, open it, clean lenses and mirrors (very carefully to avoid disturbing alignments, and scratching).

The laser unit is deep in the printer, so it's quite a lot of work, but very rewarding when you've fixed it.

Alternatives - buy a replacement laser unit and swap and clean old one at leisure, or get an exchange refurb printer - if you think your mechanical skills arn't up to it.

problem with drum unit. sometimes unit comes with cartridge and sometimes as a maintenance kit.

This is caused by a dirty laser unit.

It is possible to clean the lenses and mirrors (with care not to scratch the surface silvered mirros AND not to disturb eany of the optical components)

There's quite a bit of dismantling to do to get to the laser unit, but if you work methodically (and remember to double check everything when you are 'rebuilding' the printer) it is certainly possible.

This is a common problem and also appens with HP Color Laserjet 1600, 2600, 2605, CM1017, and Canon LBP5000.

Are you sure that none of the other colours are empty? If they are then this could be the problem

It sould be the print heads have gone bad.
I just had a Dell color laser that would print a 1" wide yellow line down the right side of the paper.
Replaced the print head unit, and problem solved.

Depends on whether the "lines" are colored or just blank areas missing in the print . If it is blank areas , then most likely the laser scanner is dirty and the glass needs to be cleaned . If it is colored lines , then you most likely have a defective drum .