Humphrey Field Analyzer II - i
Parts Removal/Replacement
Confidential and Proprietary
52235C1105
3 - 25
Field Service Guide
3.13 Touch Screen Removal
1)
Remove the operator panel (3.4).
2)
Carefully discharge the CRT high voltage to ground.
3)
Remove the screw (item 1, Figure 3-4) at each corner of the CRT bracket.
4)
Remove the CRT assembly from the operator panel.
5)
Remove the two screws (item 3, Figure 3-4) holding the touch screen bracket and
remove the bracket.
6)
Remove the touch screen.
Replacement Notes:
P
Anytime the CRT or touch screen is disassembled from the foam gaskets, the CRT
and touch screen viewing surfaces should be carefully cleaned before reassembly.
P
Make sure that the touch surface is facing outward when mounting the touch
screen. (The touch surface is a thin film laminated to one side of a glass plate.
This is easily observed by looking at the point where the flex cable exits the touch
screen.)
P
Ensure that the foam gaskets for the CRT and touch screen are sealing properly,
with no gaps.
P
The CRT anode lead must be routed over the top of the CRT neck. If the lead
passes under the neck, it lays next to the bowl and the electrostatic field around
the lead will attract dust to the inside of the bowl.
Follow-up Checks/Adjustments:
See Table 3-1.
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