Grays Are Wrong In A Color Copied Image; The Copy Is Not As Shiny As The Original; There Is A Big Difference Between Right And Left Sides Of The Copy; The Background Results Colored When Copying Newspapers - HP Designjet 5500mfp Color Manual

1.b Most of the colors are OK but certain ones are very different
Follow the steps 1 to 5 as in 1.a and proceed from there:
Yes
System Limitation. Try
Are some of the colors
modifying saturation
non reproducible?
See section 3.2 in the
and/or lightness
Annex
No
Contact HP Support Organization

2.4.2.2 Grays are wrong in a color copied image

Follow steps 1 to 4 as in 1.a of section 2.4.2.1. If the problem persists, try cleaning the
white background plate that is on the top assembly of the scanner over the glass plate.

2.4.2.3 The copy is not as shiny as the original

This may be due to not using the correct media: High Gloss or Semi Gloss media should
be used in this case.

2.4.2.4 There is a big difference between right and left sides of the copy

This may be due to right-left cameras' miscalibration. Try performing scanner
maintenance. If this does not solve the problem, please contact the HP Support
Organization.

2.4.2.5 The background results colored when copying newspapers

To avoid copying the background of a background colored document (typically sepia)
you should use the background cleaning option when scanning in color mode; if you
are interested in B&W copying you should use either Sepia or Blueprint type of original.
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Color Reproduction for the HP Large Format Color Copiers family: cc800ps, 815mfp, 5500mfp and 4200 scanner