ProcedureGantry/RotationSafetySafety

Gantry rotation interlock when servicing with cover open

Opening the gantry front cover, left side cover, or rear upper cover automatically disables gantry rotation — this reference and short procedure explains why, how to deliberately override the interlock for service work, and how to read the two serial-number-specific interlock tables (7.2-1A / 7.2-1B) that define every valid switch-state combination.

Applies to
Aquilion 16 (TSX-101A) — gantry rotation section, S/N Axxxxx control-unit configuration (Table 7.2-1A interlock states apply) Aquilion 16 (TSX-101A) — gantry rotation section, S/N Bxxxxx control-unit configuration (Table 7.2-1B interlock states apply)
Personnel
1 technician · Intermediate — reading and verifying gantry-rotation interlock switch states (NFB120/MS120/SW120) and KGTSM PWB indicators before and after a KGTSM reset, with awareness that operating SW120 the wrong way during rotation can damage the DD motor controller (skill assessment derived from procedure content — not an OEM-stated skill level).
Steps
11 steps
Source
2D201-063E*G p.104-106

Safety

NOTICE

Hazard: Turning SW120 (the rotation-enable switch) ON/OFF while the gantry is rotating.

Consequence: May damage the DD motor controller.

Avoidance: Do not cycle SW120 during gantry rotation. To turn OFF power, use NFB120 instead.

Full step-by-step for Gantry rotation interlock when servicing with cover open

All 11 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/Rotation guides

Adjust the MR sensor and MR sensor PWB20 stepsReplace the MR sensor and MR sensor PWB12 stepsReplace the rotation-direction photo sensor unit6 stepsGantry rotation speed check and fine adjustment7 stepsGantry rotation system operation and troubleshooting (S/N Axxxxx)0 stepsGantry rotation system operation and troubleshooting (S/N Bxxxxx)5 steps
View all Aquilion 16 (TSX-101A) guides

Source: 2D201-063E*G p.104-106. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.