Zeiss humphrey HFA II-i series, Field Service Manual

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Humphrey Field Analyzer II - i Parts Removal/Replacement
Confidential and Proprietary
52235C1105 3 - 15
Field Service Guide
3.5 Drive Housing Assembly Removal
1) Remove the patient switch jack from the patient switch connector located on the
bottom left of the disk drive panel.
2) Lower the power table to its lowest position.
3) Perform step 3) or step 4) as required.
a) Using both hands, place your fingers along the bottom edge of the drive housing
front panel.
b) Attempt to pull both outward and upward to remove the panel. If the panel can
be removed in this manner, proceed to step 5) below.
4) Remove the front panel from around the drive housing assembly in the following
manner:
Caution — This step must be performed carefully to avoid possible
damage to the circuit board on the bottom drive.
a) From below the instrument, insert a small diameter tool (such as a hex ball driver
— preferably with handle)
straight up
through the small hole located in the
bottom of the instrument, approximately 1.75" back from the front edge of the
bezel (Figure 3-3). Insert the tool until it touches the plastic tab securing the
bottom edge of the bezel.
Caution — If the tool is inserted with the tip tilted rearward, it may
contact and damage the bottom drive circuit board.
To unlatch the bezel, push the tip of the tool against the latch as you move the
handle of the tool rearward (Figure 3-3).
b) Pull out on the bottom edge of the drive bezel until it separates from the operator
panel.
5) Remove the three screws (two at the top, one at the bottom) that hold the drive
housing assembly in place.