Zeiss humphrey HFA II-i series Field Service Manual page 410

FA2i-012
#
Yellow Filter Assembly Installation
The Yellow Filter Assembly consists of a bracket, heat absorbing filter, diffuser, and — most
importantly — a yellow filter. When illuminated with white light, this assembly provides the yellow
bowl illumination.
To remove the bowl plug and install the Yellow Filter Assembly, refer to Figure 2 and follow the
guidelines given below.
1) Slide the carriage assembly to the rear of the projection assembly (towards the projection
lamp).
2) Pull tab on plug toward back of bowl to lift out the bowl plug from the top of the bowl.
3) Refer to Figure 2, and install the foam strip as shown. Wrap the foam strip around the filter
block assembly.
NOTE: When the foam strip is positioned properly, it should fit snugly against the bowl. It is essential that the fit is
tight enough to block light from passing between the filter block assembly and the bowl.
4) Install the Yellow Filter Assembly. The Yellow Filter Assembly should come pre-assembled.
If not, refer to Figure 2 for assembly.
PARTS LIST for Figure 2
Item
1
2
3
4
5
6
7
8
9
10
11
Part No. Qty
24489 1
29956 1
29958 1
29957 1
28293-8 1
14446 1
28295-8 2
14445 2
29738 2
29950 1
01147 7"
Description
Retainer, Filter
Filter, Heat (Clear)
Diffuser (White or Milky)
Filter, Yellow
Screw, M3 x 8
Washer, Square Cone
Screw, M4 x 8
Washer, Square Cone
Washer, Flat, .187/.750/.060, SST
Bracket, Filter Mounting
Tape, Foam
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