Zeiss humphrey HFA II-i series, Field Service Manual

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Parts Removal/Replacement Humphrey Field Analyzer II - i
Confidential and Proprietary
Field Service Guide
3 - 34 52235C1105
Replacement Notes:
P
The replacement cable tie(s) for the motor cable must be installed before
reinstalling the projection assembly in the instrument.
P
Adjust the belt tension (Section 4).
Follow-up Checks/Adjustments:
See Table 3-1.
3.23 Shutter Removal
Caution — Handle the shutter carefully! It is delicate and easily
deformed or damaged.
1) Switch ON the HFA II - i . Proceed to the shutter calibration menu. Select OPEN
shutter. Do not make any other selections.
2) Remove the front and rear covers (3.2, 3.3).
3) Loosen the two setscrews holding the ND film wedge to its shaft, and remove the
wedge. (Use care to not bend the film wedge and to not get fingerprints or marks
on the film surface.)
4) Observe the current position of the shutter. The shutter should later be installed at
the same position —
this is very important!
5) Loosen the setscrew that secures the shutter to the motor shaft. Gently angle the
shutter, and remove it from the shaft.
Replacement Notes:
P
Position the shutter for adequate clearance between the glass wedge and the
projection casting. Gently bend the shutter, if necessary.
P
Put the shutter in the same position you observed during removal, before securing
it to the motor shaft.
Follow-up Checks/Adjustments:
See Table 3-1.