
158 1100 Series DAD and MWD Reference Manual
4 Repairing the Detector
Exchanging the Source Lens (Achromat) Assembly
When required The source lens (achromat) assembly might be cleaned or replaced when the
transmission of light is reduced and a lamp exchange or new spectro
windows do not improve the light throughput
Tools required Screwdriver POZI 1 PT3
hexagonal key 1.5 mm
A pointed pair of pliers
Parts required Source lens (achromat) assembly G1315-65201(includes filter lever
G1315-45001)
Spectro window 79880-28111
Filter lever G1315-45001
NOTE
If the filter motor was removed, the filter lever should not be reused. Always use a new
filter lever to assure correct fit on the filter motor shaft.
Preparations for this procedure:
• Turn off the lamp.
• Switch off detector and disconnect the power cable.
• Remove detector from stack and place it on the working
bench.
• Remove the front cover, top cover and top foam section,
see “Removing the Top Cover and Foam” on page 140.
• Remove the optical unit, see “Removing the Optical Unit
(G1315A/G1365A)” on page 154 or “Removing the
Optical Unit (G1315B/G1365B)” on page 156.
1 Place the optical unit on your bench.
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