HP LASERJET 3800 - Manual (Page 12)

Page 12 of 18
b. Next, pay attention to the area marked with the two red arrows, enlarged in the picture
below. It is possible that during the handling of the MDA one or both of these two gears
can be mis-positioned by accident. If this happens, one or more of the color planes could
be missed during printing.
The gear on the right controls the black cartridge; it drives the larger gears to
right below it to the right.
The gear on the left controls all three of the color cartridges; it drives al the
remaining three larger gears, the one directly below it and the two to the left.
(Indicated by the dotted oval in the picture above).
Check if they are properly aligned as follows:
Both gears can be rotated either way to properly correct the MDA gears alignment. The
images above show how to verify if the gears are correctly aligned. The two holes from
larger gears should both be showing as illustrated by the red circles. (The large gears are
under the frame and driven by the smaller gears.)