Chapter 9 — Maintenance
90
2Pressthesnap-lock,lifttheouterendofthelowerguideand
pullitout.
3Checkforanythingblockingthebeamoflight,suchasdust,
stucklabels,oradhesiveresidue.Ifnecessary,cleantheguides
usingacleaningcardorasoftclothsoakedwithisopropyl
alcohol.Donotuseanyothertypeofchemical.
Isopropylalcohol[(CH-3)2CHOH;CAS67-63-0]isahighly
flammable,moderatelytoxic,andmildlyirritatingsubstance.
4Aftercleaning,reassembleinreverseorder.
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