ProcedureGantryAdjust

Align the slip-ring brush assemblies

During installation, seat each large-current slip ring (LCSR) brush's contact point on its ring — loosen the brush assembly's mounting bolts, insert the alignment jig against the slipring between channels 2 and 3, retorque the four mounting bolts to 4.4 N·m, then verify no displacement — per section 5.6.2 ("Brush alignment") of the Installation volume, the step that immediately follows LCSR cleaning (section 5.6.1) in the gantry bring-up sequence.

Applies to
Aquilion 16 (TSX-101A)
Personnel
Adjustment/calibration performed as part of gantry bring-up: temporarily loosening a brush assembly's mounting screws, seating a dedicated alignment jig into the brush-assembly groove against the slipring between channels 2 and 3, torquing the four mounting bolts to 4.4 N·m with the jig held in place, then withdrawing the jig and visually confirming the brush sits true to the ring. Also requires judgment calls — reading the acceptable/unacceptable centering criteria off the reference figure and recognizing an unevenly worn brush that needs trimming with a cutter before alignment. No meters or electrical test gear are called out in this section. (Skill assessment derived from the procedure's content — not an OEM-stated skill level.)
Steps
10 steps
Source
2C201-160E*F p.55-59

Tools & parts

ItemPart numberQty
Alignment jign/a in source — the related brush-replacement job on the Gantry Mechanism volume cites this same jig as BSX77-4283, see [Replace the large-current slip ring brushes](toshiba-ct-aquilion16-gantry-replace-lcsr-brushes.md)1
Cuttern/a in source1
Standard mounting hardwaren/a in source1 set

Safety

CAUTION

Hazard: A brush that has worn unevenly can develop a step-like projection where it lost contact with the ring across the center surface

Consequence: Short circuit

Avoidance: If such a brush is found, remove the projection with a cutter so the brush surface is even before performing brush alignment

NOTICE

Hazard: Correcting an unevenly worn or burred brush with sandpaper instead of a cutter — grains can remain on the ring or brush. Source labels this call-out CAUTION; reclassified NOTICE here because the stated consequence (abnormal brush wear) is an equipment/procedure-quality outcome, not personal injury

Consequence: Abnormal wear of the brushes

Avoidance: Remove unevenness or burrs using a cutter; never use sandpaper on the brushes

Full step-by-step for Align the slip-ring brush assemblies

All 10 steps are documented in the FSELIB Aquilion 16 (TSX-101A) service manual — re-authored, web-first, with the real figures from the source.

Open the full procedure

Related Gantry guides

Bring the gantry into the scanner room15 stepsClean the large-current slip ring (LCSR)21 stepsOperational checks of gantry, couch, detector and X-ray tube18 stepsInstall optional units and mount the covers6 stepsClean dome internal-projector window and check Mylar ring mounting — 1.345 stepsGantry fan-noise check and filter cleaning — 1.44/1.456 steps
View all Aquilion 16 (TSX-101A) guides

Source: 2C201-160E*F p.55-59. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.