3
Remove the four screws in the corners of the boards.
Do not remove the four small screws.
The source and detector housings (with attached circuit boards) can now be removed. The
bench will appear as shown below. It is a good practice to replace the O-rings when cleaning or
replacing the optical path.
There are a number of swabs in the spare parts kit. Dip one end of the swab into a 50:50 eth-
anol/water solution and carefully swab both ends of the optical bench, until there is no more vis-
ible residue. A mild solution of dish washing type soap and water will also work. Do not use
abrasive cleansers, as they can irreparably damage the gold plating on the optical bench.
5-3Section 5. Maintenance
Section 5
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