TroubleshootingCouch/TableTroubleshootingTroubleshoot

Patient couch troubleshooting — vertical lift, horizontal slide, rollers, and noise (by symptom)

Use this page when the patient couch misbehaves mechanically or hydraulically — it won't go up or down, the couch top won't slide into or out of the gantry opening, it jolts/rattles/is curved, or it makes noise — and you need to go from what you observe to the check to run to the fix, without guessing.

Applies to

Activion16 (TSX-031A) patient couch — mechanical/hydraulic troubleshooting by symptom: vertical (hydraulic) lift, horizontal (longitudinal) drive, couch-top rollers/slide mechanism, and drive noises. Electrical check items referenced throughout ('check ... electrically') are detailed in the separate Gantry/Couch Control volume, not in this manual.

Steps

3 steps

Source

2D201-112EN*D §2.3 Troubleshooting and repair (pp.127–131)

Tools & parts

Item	Part number	Qty
Hydraulic pump (vertical-drive lift)	n/a in source
Solenoid valve (vertical-drive hydraulic circuit)	n/a in source
Tilt encoder (gantry)	n/a in source
Overcurrent relay	n/a in source
IN-limit sensor (couch top)	n/a in source
OUT-limit sensor (couch top)	n/a in source
Longitudinal movement drive unit	n/a in source
Drive pulley / idler pulley	n/a in source
Horizontal drive belt	n/a in source
Couch-top coupling chain	n/a in source
Encoder (couch-top horizontal position, mounting screw)	n/a in source
LM guide / U-shaped rail (couch-top slide mechanism)	n/a in source

Safety

WARNING

Hazard: Confirming these symptoms means running the couch under power — hydraulic lift raising/lowering, or the horizontal drive moving the couch top in/out over the rollers, belt, and chain — while you observe it up close

Consequence: pinch/crush injury to hands, tools, or clothing caught between the couch top, rollers, belt, chain, or gantry opening

Avoidance: clear hands, tools, and clothing from the couch travel path, rollers, belt, and chain before commanding vertical or horizontal motion during diagnosis

WARNING

Hazard: Several checks in this table are electrical checks on live circuits: the couch electrical system (180 VAC or more), the clutch/brake circuit (24 VDC ±10%), the motor circuit, the solenoid valve, and the control PWB

Consequence: electric shock

Avoidance: treat every "check ... electrically" instruction in this table as live-circuit work; verify isolation/PPE per the Gantry/Couch Control volume before opening the electrical enclosure

CAUTION

Hazard: Hydraulic oil leakage from the vertical-drive system, or running the hydraulic pump low on oil

Consequence: slip hazard from spilled oil, and further pump/valve damage if run without adequate oil

Avoidance: locate and record the leak source and conditions (see method below) before adding oil or replacing the solenoid valve; do not ignore an oil-leak symptom

Full step-by-step for Patient couch troubleshooting — vertical lift, horizontal slide, rollers, and noise (by symptom)

All 3 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 steps Adjust the couch height display6 steps Adjust the couch-top longitudinal belt tension6 steps Adjust the couch-top supporting rollers (height, level, and sway)8 steps Change the patient couch vertical stop positions2 steps Check the couch-top (horizontal) travel speed4 steps

View all Activion16 (TSX-031A) guides

Source: 2D201-112EN*D §2.3 Troubleshooting and repair (pp.127–131). Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.