Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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Humphrey Field Analyzer II - i Parts Removal/Replacement
Confidential and Proprietary
52235C1105 3 - 49
Field Service Guide
3.37 Trial Lens Holder Assembly Removal
1) Remove the front cover (3.2).
2) Disconnect the "TRIAL LENS LEDS" cable (P5) from the Patient Support
Interconnect PCB. Cut any cable ties securing this cable.
3) Remove the two screws that secure the trial lens holder assembly to the pivot
shaft.
4) Cut the cable tie that secures the ground wire and trial lens LED wires to the trial
lens holder assembly. (The same ground wire will be used with the replacement
trial lens holder.)
5) Carefully manipulate the lower end of the trial lens holder and attached cable out
through the slot in the trial lens trap.
If the pivot block removal is also required, continue as follows:
Caution — A captive steel ball and compression spring will fall
loose as the pivot block is removed (Fig. 3-12).
6) Hold the pivot block against the
main patient support bracket, and
remove the pivot screw from the trial
lens holder (Figure 3-12).
7) Once the pivot screw has been
removed, slowly raise the pivot
block and catch the steel ball and
compression spring as they are
released.
Replacement Notes:
P
Be sure that the steel ball and
compression spring are in place
before securing the pivot block.
P
Make sure that the curved washers
are positioned on the pivot screw
with the correct side against the flat
washer (Figure 3-12).
FIGURE 3-12. Pivot Block Removal