Clean the large-current slip ring (LCSR)

Hazard: Dust accumulated on the slip ring during shipping/transportation, still present when installation work begins

Consequence: Not stated explicitly in source beyond the instruction itself — the manual only states that dust may have accumulated and that the slip ring must be cleaned before installation starts

Avoidance: Clean the slip ring before starting installation, since dust may have accumulated on it during transportation

Hazard: Cleaning abraded brush material with alcohol; source labels this call-out "CAUTION" — reclassified NOTICE here because the stated outcome is an LCSR short circuit, not personal injury

Consequence: Abraded brush material solidifies in the slip ring groove, causing an LCSR short circuit

Avoidance: Do not use alcohol to clean the abraded brush material

Hazard: Mishandling the ring, cover, or brushes while cleaning the slip ring brush — using sandpaper on brush burrs, forcing the cover against the ring, rough handling of the fragile brushes, abraded material (powder) left to fall into the gantry, off-center brush mounting, or a miswired cable; source labels this call-out "CAUTION" — reclassified NOTICE here because every listed outcome is equipment/procedure-quality, not personal injury

Consequence: Abnormal brush wear (if sandpaper grains enter the brushes), a damaged ring, damaged or broken brushes, contamination inside the gantry, or a misaligned/miswired brush assembly

Avoidance: Remove brush burrs with a cutter only — never sandpaper; take care not to force the ring when removing a cover; handle the brushes carefully and trim only their burrs; keep abraded material from falling into the gantry; center the brush assemblies on the ring using the alignment jig; verify the cable is connected correctly

Hazard: Performing other check/cleaning work with the dome cover removed after this cleaning procedure, without completing step (12) onward; source states this call-out twice — before step 1 and again after step 11

Consequence: Foreign matter such as dust or screw shavings falls on the slip ring, possibly resulting in slip ring discharge

Avoidance: Perform every check item described in step (12) onward of this procedure any time the dome cover is left off for other work

Hazard: A brush worn unevenly, left untrimmed before brush alignment; source labels this call-out "CAUTION" — reclassified NOTICE here as an equipment-only outcome

Consequence: A projection can form on the brush, resulting in a short circuit

Avoidance: Remove the projection using a cutter so the brush surface is even before performing brush alignment

Hazard: Using sandpaper to correct unevenness on a worn brush; source labels this call-out "CAUTION" — reclassified NOTICE here as an equipment-only outcome

Consequence: Sandpaper grains entering the brushes causes abnormal brush wear

Avoidance: Never use sandpaper to correct brush unevenness — use a cutter only

Hazard: Using a brush assembly mounting screw longer than the specified length; source labels this call-out "CAUTION" — reclassified NOTICE here as an equipment-only outcome

Consequence: Reduced clearance between the screw and the slip ring, possibly causing an LCSR short circuit

Avoidance: Use only the specified mounting screw (*6B6-20SDM, 20 mm long, fitted with washers SW6 and 2W6), confirmed with a ruler