TroubleshootingData TransmissionTroubleshootingTroubleshoot

Malfunction of DAS data communication — cause investigation (streak/ring artifacts)

Use this page when a scan shows a streak or ring artifact and you need to determine whether the fault is in the DAS data path or in the MUDAT/GCIFA data-transmission path. Source presents this as one short orienting explanation, a 2-page fault-isolation flowchart, and five numbered sub-procedures the flowchart invokes: (1) raw data check, (2) manual check, (3) console test, (4) DAS test mode, and

Applies to
Activion16 (TSX-031A), Volume 2, Data Transmission Unit (MUDAT optical link + OPCONTA/GCIFA interface, DAS data path). Source does not call out a hardware-generation-specific variant of this tree (unlike the DAS chapter's Converter-16 vs. AJ-CONVERTER split) — it is described once and applies throughout.
Steps
26 steps
Source
2D201-113EN*J §3.5.3 'Malfunction of DAS data communication' / §3.5.3.1 'Investigating the cause of abnormal image' (pp.367-373) + (4) DAS test mode / (5) VT check (p.389). The GCIFA console test pattern tables printed between (pp.374-388) are out of scope for this atom — see §3.5.3b, toshiba-ct-activion16-dtu-reference-console-test-patterns.

Tools & parts

ItemPart numberQty
GCIFA PWBn/a in source
OPCONTA PWBn/a in source
KGTSM (PWB / maintenance panel)n/a in source
SS/ADI2 PWBn/a in source
DASn/a in source
Detectorn/a in source
PREn/a in source

Full step-by-step for Malfunction of DAS data communication — cause investigation (streak/ring artifacts)

All 26 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 Data Transmission guides

Check gantry rotation and MUDAT data transfer after working on the MUDAT7 stepsCheck the MUDAT transmission-LED luminescence (ROT and SOT sides)7 stepsData transfer section error-identification test tools (DAS / Console / ROTSOT / SOTROT / OPCONTA / GCIFA)6 stepsDisassemble the MUDAT (rotation and stationary section PWBs)8 stepsGCIFA-D2 PWB troubleshooting flowchart (Data Transmission)0 stepsMalfunction of control system data communication — MUDAT ROTSOT/SOTROT fault tree (Data Transmission)14 steps
View all Activion16 (TSX-031A) guides

Source: 2D201-113EN*J §3.5.3 'Malfunction of DAS data communication' / §3.5.3.1 'Investigating the cause of abnormal image' (pp.367-373) + (4) DAS test mode / (5) VT check (p.389). The GCIFA console test pattern tables printed between (pp.374-388) are out of scope for this atom — see §3.5.3b, toshiba-ct-activion16-dtu-reference-console-test-patterns.. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.