ProcedureCouch/TableSetup & CalibrationAdjust

Change the patient couch vertical stop positions

Fine-tune where the patient couch top's vertical (height) travel is stopped, by repositioning the height-detection photosensor for the stop position you need to change. These stop positions exist for safety — they are what keeps the couch top from interfering with a tilted gantry, from being driven in while already too low, or from over-traveling past its UP/DOWN limits.

Applies to
Activion16 (TSX-031A). No model/revision restriction is called out in this section. Source explicitly scopes this task: perform only per instructions from the factory, and only as a fine adjustment.
Steps
2 steps
Source
2D201-112EN*D §2.6.2 (pp.156–157) — Changing the vertical stop positions

Tools & parts

ItemPart numberQty
PHC21 photosensor (Upper Limit / UP)n/a in source
PHC27 photosensor (HEIGHT-0)n/a in source
PHC26 photosensor (HEIGHT-0.5)n/a in source
PHC23 photosensor (HEIGHT-1)n/a in source
PHC24 photosensor (HEIGHT-2)n/a in source
PHC25 photosensor (Auto-Stop)n/a in source
PHC22 photosensor (Lower Limit / DOWN)n/a in source
Photosensor fixing screwn/a in source

Safety

CAUTION

Hazard: Adjusting the vertical-stop photosensor positions other than as instructed by the factory for the specific unit

Consequence: The stop positions no longer perform their safety function (preventing couch-top/gantry interference and over-travel at the UP/DOWN limits), and the procedure itself calls for only fine adjustment, not a large change

Avoidance: Perform this adjustment only according to instructions from the factory; do not attempt a large repositioning of any photosensor

NOTICE

Hazard: Moving a height-detection photosensor in the direction opposite the one indicated for the stop position being adjusted

Consequence: "Trouble will occur" (source's own wording — a fault in the affected stop position)

Avoidance: Loosen only the fixing screw of the selected sensor and move it in the indicated direction; never move it the opposite way

Full step-by-step for Change the patient couch vertical stop positions

All 2 steps are documented in the FSELIB Activion16 (TSX-031A) service manual — re-authored, web-first, with the real figures from the source.

Open the full procedure

Related Couch/Table guides

Adjust the couch descent (lowering) speed — solenoid throttle valves L21/L245 stepsAdjust the couch height display6 stepsAdjust the couch-top longitudinal belt tension6 stepsAdjust the couch-top supporting rollers (height, level, and sway)8 stepsCheck the couch-top (horizontal) travel speed4 stepsCouch — routing of the internal cables at the linkage unit (work procedure)8 steps
View all Activion16 (TSX-031A) guides

Source: 2D201-112EN*D §2.6.2 (pp.156–157) — Changing the vertical stop positions. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.