TroubleshootingGantry/RotationTroubleshootingTroubleshoot
Gantry rotation system operation and troubleshooting (S/N Bxxxxx)
Diagnose an Aquilion 16 gantry-rotation fault on an **S/N Bxxxxx** unit by first confirming how the rotation control loop is supposed to behave through a normal power-up, start, and stop cycle, then working the OEM's own error-message flowchart and alarm-code (AL.) fault list down to the servo amplifier, MR sensor, cabling, or PWB actually at fault.
Applies to
Aquilion 16 (TSX-101A) — gantry rotation section, S/N Bxxxxx configuration only (source §7.6.2). The gantry/couch control volume documents S/N Axxxxx separately at §7.6.1 — see the sibling S/N Axxxxx atom in Related before applying anything below to an S/N Axxxxx unit.
Personnel
1 technician · Intermediate to advanced — electrical/electromechanical fault isolation on the gantry rotation drive: oscilloscope work at the MR sensor (5 VDC pulse check), continuity checks across KGTSM/servo-amplifier/KGTSP connectors, a resistance measurement at the servo amplifier terminal board, and DIP-switch/LED verification on the KGTSM PWB — escalating to replacement of the servo amplifier, DD motor, MR sensor/PWB, KGTSP PWB, or feedback resistors, and in several places to contacting Toshiba's Nasu Operations directly instead of continuing the repair in the field (skill assessment derived from procedure content — not an OEM-stated skill level).
Steps
5 steps
Source
2D201-063E*G p.129-140
Full step-by-step for Gantry rotation system operation and troubleshooting (S/N Bxxxxx)
All 5 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 procedureRelated 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 interlock when servicing with cover open11 stepsGantry rotation speed check and fine adjustment7 stepsGantry rotation system operation and troubleshooting (S/N Axxxxx)0 steps
View all Aquilion 16 (TSX-101A) guidesSource: 2D201-063E*G p.129-140. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.