ProcedureCouch/Table (Vertical)TroubleshootingEmergency

Lower the Patient Couch from a Raised Position After a Failure (200 VAC Jig)

When the patient couch loses power while raised — for example, a blown fuse in the gantry cuts supply to the couch — use this recovery procedure to drive the couch back down with a temporary 200 VAC jig, rather than leaving a patient couch stranded up.

Applies to
Aquilion 16 (TSX-101A) — patient couch CBTB-016A / CBTB-016B, emergency lowering of the couch from a raised position after a power failure upstream of the couch (e.g. a blown fuse in the gantry), source volume 2D201-062
Personnel
1 technician · Intermediate — assembling/using a temporary 200 VAC step-up supply and toggle-switch jig wired directly into a connector on a stuck, energy-holding couch, with direct exposure to line-derived voltage and a moving mechanical load (skill assessment derived from procedure content — not an OEM-stated skill level)
Steps
4 steps
Source
2D201-062E*F p.39-41

Tools & parts

ItemPart numberQty
**CP** — power ON/OFF circuit protectorFuji Electric **CP32E-1S005** or equivalent
**CP socket**Fuji Electric **CP-S2** or equivalent
**STR** — step-up transformern/a in source
**SW** — couch UP/DOWN toggle switchOTAX **ATP01** or equivalent
**CN** — couch connection contactor, housingJapan AMP **350736-1** or equivalent
**CN** — couch connection contactor, contactJapan AMP **350550-1** or equivalent
Cable—
Switch positionn/a in source
Couch UPn/a in source
Centern/a in source
Couch DOWNn/a in source

Safety

CAUTION

Hazard: 200 VAC applied directly to the patient-couch connector (CNN1) while performing this recovery procedure, and the couch itself moving downward once power is applied

Consequence: Electric shock from the energized connector; a hand or head caught by the couch as it moves down

Avoidance: Take care to avoid electric shock while working at the connector. Keep hands and head clear of the couch's path before and while applying power, so nothing is caught as the couch moves down.

Full step-by-step for Lower the Patient Couch from a Raised Position After a Failure (200 VAC Jig)

All 4 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 Couch/Table (Vertical) guides

Adjust the vertical (lowering) motion speed5 stepsChange the vertical stop positions (height photosensor adjustment)2 stepsJack Up the Patient Couch When It Will Not Rise From the DOWN Limit4 stepsReplace the hydraulic unit (cylinder, pump, oil tank)25 stepsRoute the internal cables at the lifting linkage8 stepsTroubleshoot: couch will not go up/down and oil leakage9 steps
View all Aquilion 16 (TSX-101A) guides

Source: 2D201-062E*F p.39-41. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.