Patient Support Horizontal (X-Axis) Belt/Motor Removal - Zeiss humphrey HFA II-i series Field Service Manual

Parts Removal/Replacement
3.34 Patient Support Horizontal (X-axis) Belt/Motor
Removal
NOTE - The headrest drive belt drives the headrest horizontally in sync with the chinrest.
Anytime the headrest belt is off, if either the headrest or chinrest lead screw is rotated
independently, the headrest and chinrest will become misaligned.
Remove the front cover (3.2).
P
Pull the headrest drive belt (long belt) to move the chinrest horizontal lead screw
P
nut up against its limit nearest to the X-motor. (Since the chinrest and headrest
horizontal lead screws are linked by the belt, both lead screws will rotate when the
belt is pulled.)
Belt Removal:
1) Remove the four screws securing the chinrest assembly to the front cover
assembly (Figure 3-9).
2) Lift the chinrest assembly away from the front cover assembly and remove the belt
from the X-motor pulley.
3) Maneuver the belt downward between the headrest pulley and the front cover
assembly until the belt is free.
Motor Removal:
1) Remove the four screws securing the chinrest assembly to the front cover
assembly (Figure 3-9).
2) Remove the chinrest assembly.
FIGURE 3-9. Removing the Chinrest Assembly
Field Service Guide
Humphrey Field Analyzer II - i
(continued)
Confidential and Proprietary
3 - 44 52235C1105