Troubleshooting guide

12. Install stepper motor using two new Torx screws.
13. Install cam on the spindle and turn the dial in both directions to insure no binding before
replacing the back cover assembly.
Please Note: If replacing an old style motor with a new style motor you must replace
the drive cam with a new style drive cam. To determine which cam you have,
compare your cam to the drawings in (Fig. 1, 2, 3, or 4). The new style cam
has two (2) extra teeth. The cams shown in Fig. 1 and Fig. 3 are the new
style cams. Fig. 1 and Fig. 2 have a slotted screw and Fig. 3 and Fig. 4 have
a hex screw. The cams in Fig. 2 and 4 are the old style, without the two (2)
extra teeth.
14. Replace the back cover assembly.