Cap/Wipe/Purge Assembly Belt Adjustments - Xerox Phaser 840 Service Manual

Cap/wipe/purge assembly belt adjustments

The tension of the cap/wipe/purge assembly belts is factory-set. Do not adjust the belts'
tension unless you remove or replace one or both belts. The belts are Kevlar-reinforced;
they will not stretch over their lifetime. The belts are also factory-adjusted for parallel
tracking (alignment). As long as the belts, cap/wipe/purge assembly motor, or the belt
clips (which hold the cap/wipe/purge assembly) are not disturbed, no adjustment is
needed.
However, if you replace one or both of the belts or the cap/wipe/purge drive motor, you
must ensure that the belts are in alignment (timing) with each other; this ensures that the
cap/wipe/purge assembly is perfectly aligned to the faceplate of the printhead. If the belts
are not aligned, the printhead purging is ineffective, due to poor sealing between the
printhead faceplate and the cap/wipe/purge assembly.
Ensure that the cap/wipe/purge assembly is properly installed.
1.
Tilt the printhead back to its locked position.
2.
Rotate the large drive gear to pull the cap/wipe/purge assembly to about the middle of
3.
its travel in the chassis frame slot.
Ensure each timing belt lock is tightened to its fourth tooth, as illustrated, and that the
4.
belts are installed completely (all the way to the end of the channels in the belt lock).
Position the right-side timing belt lock so its pointer points at the index mark on the
5.
printer frame.
Holding the right belt so it does not move, inspect the left side timing belt lock's
6.
pointer; it should point between the index marks on the left side printer frame.
If the left-side pointer does not point between the index marks while the right-side belt
lock is at its mark, loosen the right timing belt by removing the lower idler pulley and
adjust the belt so that it aligns with the timing mark.
Repeat until the right-side timing lock's pointer points at the index mark on the
7.
right-side frame as the left-side timing belt lock's pointer points between its index
marks on the left-side frame.
4 - 150 Phaser 840/850/860/8200 Color Printer - Service Manual