HP Designjet T1100 MFP, 4500mfp, 4500 Scanner, 820 MFP Service Manual
(Camera A has been zoomed in):
The signal has to be as even as possible and especially the ends have to be
at their highest possible level.
When the focus is right, tighten the Focus Lock Screw.
Keep in mind that if you adjusted the Focus, the Scan-Width
has changed and must be adjusted.
There is a mark on every lens, which indicates its "best position". If you have
completed the focus adjustments and this mark isn't pointing upwards, mark
the upward position on the Lens Adapter. Turn the Lens Adapter and
loosen the Focus Lock Screw and the three Lens Fixing Screws (with a
1,5 mm Allen key). Then turn the Lens so that the mark is pointing upwards,
tighten the Lens Fixing Screws again. Turn the Lens Adapter back
again and check that the focus it still correct before tightening the Focus
When adjusting the Scan-Width, you adjust up against some line on an
Optical Adjustment Pattern.
The Optical Adjustment Pattern is a metal construction with a pattern glued
Scanner Adjustments and Calibrations