ProcedureGantryPM

Gantry safety-circuit operation checks via KGTSM (tilt/vertical/horizontal, runout, rotation error) — 1.38/1.39/1.40

Exercise the KGTSM PWB's dedicated safety circuit end-to-end over a HyperTerminal session — the tilt, couch-vertical, and couch-horizontal double safety signals and their timers (item 1.38), the couch horizontal-movement runout lock (item 1.39), and, on TSX-101A/5, the rotation-ERROR detection circuit (item 1.40) — confirming each one still shuts the gantry down exactly the way it is supposed to.

Applies to
Aquilion 16 (TSX-101A). Items 1.38 and 1.39 carry no stated model/couch-variant restriction in this source excerpt. Item 1.40 is explicitly headed "(For TSX-101A/5)" in source — treat item 1.40 (the rotation-ERROR detection check) as scoped to that variant; do not assume it applies to every TSX-101A gantry built.
Personnel
1 technician · Intermediate — requires a HyperTerminal session to the KGTSM PWB over CN404, entering hex GTS memory addresses and data values from a PC keyboard, changing the KGTSM PWB's DSW4/DSW5 DIP-switch banks and its SW1/SW11/SW12/SW31/SW32 switches, positioning the gantry/couch to clear interlocks beforehand, disconnecting/reconnecting CN451 and CN432 at the right points, and timing LED20/LED38/LED75 responses against stated tolerances (about 1 second, about 1.7 seconds). (Skill assessment derived from the procedure content — not an OEM-stated skill level.)
Steps
13 steps
Source
2Y201-061E*E p.77-85

Safety

WARNING

Hazard: not performing item (c) — disconnecting CN451 of the KGTSM PWB — before checking a safety circuit that turns out to be defective

Consequence: the gantry may move unexpectedly, resulting in injury

Avoidance: be sure to perform item (c) exactly as given: disconnect CN451 of the KGTSM PWB before proceeding to the safety-circuit checks below

WARNING

Hazard: operating the gantry/couch from the console keyboard while this KGTSM safety-circuit check is running

Consequence: not spelled out beyond the imperative in this source passage — discontinuing console operation is stated as a flat requirement for the duration of the check, not qualified with its own consequence text here

Avoidance: turn OFF the gantry/couch operation switch on the console keyboard before starting (step (e)) and keep console operation discontinued for the whole check

Full step-by-step for Gantry safety-circuit operation checks via KGTSM (tilt/vertical/horizontal, runout, rotation error) — 1.38/1.39/1.40

All 13 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 stepsAlign the slip-ring brush assemblies10 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 steps
View all Aquilion 16 (TSX-101A) guides

Source: 2Y201-061E*E p.77-85. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.