Y-Axis Belts Tension Adjustment (Phaser 850/860 Printer) - Xerox Phaser 840 Service Manual

Y-axis belts tension adjustment (Phaser 850/860
printer)
Perform this procedure after loosening or removing the Y-axis belt drive assembly. Note
the additional steps you must perform for a new Y-axis drive assembly.
It is not necessary to remove the tensioning bracket for this
Warning
adjustment. However, if you do, follow the procedure "Y-axis belt
drive assembly (Phaser 850/860 printer)", on page 7-201".
Improperly removing the tension spring can cause the tension
bracket to flip off forcefully, causing injury.
Ensure that the three mounting screws that secure the Y-axis drive assembly to the
1.
chassis are 1 turn loose and that the Y-axis drive assembly slides freely with respect to
the chassis.
If there is a situation in which diagnostics are not available when
Note
installing a new Y-axis drive assembly or drum/transfix assembly,
then locate any previously placed index marks on the pulleys and
proceed as if re-using existing parts. Allow the system to cool as
long as feasible before mounting the Y-axis drive assembly onto
the chassis. Tensioning of the y-axis drive assembly without
diagnostics increases the risk of failures associated with low belt
tension (for example, a "growling" sound heard upon cold
power-ups).
If not in place, attach the tension spring between the Y-axis drive assembly and the
2.
tension spring bracket.
A metal clip attaches the spring to the Y-axis drive assembly; the
Note
spring DOES NOT attach directly to the plastic housing of the
Y-axis drive assembly. Refer to the illustration on page 7-201.
While the belts are under tension, rotate the drum pulley 5 times to rotate the belts and
3.
seat them in place. For an old Y-axis drive assembly, continue rotating the pulleys until
the index marks on each pulley align next to each other.
Beginning with the upper-right screw, tighten the three mounting screws to 30 in.-lbs.
4.
to secure the Y-axis drive assembly in place.
For new Y-axis drive assembly (Phaser 850). Using PC-based diagnostics, run the
5.
test: "Position for Belt Tightening" in the "Y-Axis Group" test suite. This positions
the belts in the proper orientation for re-tensioning. Do not move the pulleys.
For the Phaser 860. Use the adjustment from the service menus.
Place an index mark on the edge of each pulley: Mark the Y-axis drive pulley and the
6.
drum pulley where the edges are closest to one another, disregarding previous marks.
Use a distinct color if the pulleys have been previously marked.
Loosen the 3 mounting screws until the bracket slides freely on the chassis and then
7.
re-tighten the screws to 30 in.-lbs.
Reassemble the printer and make a test print.
8.
4 - 144 Phaser 840/850/860/8200 Color Printer - Service Manual