ProcedureDetectorReplacement/FRUReplace

Replace the REF detector

The REF (reference) detector sits behind the leakage beam shielding plate. On systems with the small-focus X-ray tube (CXB-400C), reaching it means first clearing the optical system shielding cover, the optical system (slit/wedge), and the X-ray tube out of the way. The REF detector itself is a high-precision part — handle it with care throughout.

Applies to
Activion16 (TSX-031A). Applies identically to both DAS hardware generations documented in this manual: CDAS-035A/1A (§2.9.4, pp.211-214) and CDAS-035A/2A (§2.17.4, pp.305-308) — the source prints the same procedure, word-for-word, in both places, so one atom covers both. Systems with the small-focus X-ray tube (CXB-400C) require the optical system shielding cover, the optical system (slit/wedge), and the X-ray tube to be removed first.
Personnel
Field service engineer (CT gantry — detector/optical-system/X-ray tube access)
Steps
11 steps
Source
2D201-113EN*J §2.9.4 'Replacement of the REF detector' (pp.211-214, CDAS-035A/1A generation), verbatim-identical duplicate at §2.17.4 (pp.305-308, CDAS-035A/2A generation)

Tools & parts

ItemPart numberQty
Standard toolsn/a in source1 set
Multimetern/a in source1
Insulated cable tiesn/a in sourceSeveral
REF detector (replacement unit)n/a in source1
Insulating washers (REF detector mount)n/a in sourcen/a in source

Safety

CAUTION

Hazard: Touching the optical-system shield-cover drive motor while removing the front cover

Consequence: Burn injury — the motor is hot

Avoidance: Do not touch this motor

NOTICE

Hazard: Mishandling the REF detector during removal or remounting (it is a high-precision part)

Consequence: Damage to the REF detector (equipment damage only — no injury is stated in source for this item)

Avoidance: Handle the REF detector with care throughout removal and remounting

Full step-by-step for Replace the REF detector

All 11 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 Detector guides

Replace the main detector35 stepsSet up the temperature controller after replacement (main detector)7 stepsAdjust the SS/ADI4 audio (gantry/console speaker and microphone VRs)4 stepsClean the console mouse4 stepsReplace disk array units (BSX74-2035E) — disk drive, power supply, and fan units10 stepsReplace disk drive, power supply, or fan units in the BSX74-1900E raw data disk array9 steps
View all Activion16 (TSX-031A) guides

Source: 2D201-113EN*J §2.9.4 'Replacement of the REF detector' (pp.211-214, CDAS-035A/1A generation), verbatim-identical duplicate at §2.17.4 (pp.305-308, CDAS-035A/2A generation). Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.