TroubleshootingDASTroubleshootingTroubleshoot
Troubleshoot large image SD
Work Figure 5.4-21 against a large image-SD (standard deviation) symptom on the Aquilion 16 to trace the fault — through the X-ray tube current, the DAS/detector offset-SD chain, and the reference-channel/optical path — down to one probable cause (source 2D201-065, §5.4, p.83).
Applies to
Aquilion 16 (TSX-101A) — data acquisition section (DAS), source volume 2D201-065, §5.4 large-image-SD fault-isolation flow (Figure 5.4-21, p.83). One of four image-artifact decision trees this chapter provides — see Related for the sibling ring-image, streak-shower, and shifted-CT-number flows.
Personnel
1 technician · Intermediate — checking X-ray tube current, reading a DCA-calculated offset-SD result, physically exchanging a Converter-16 PWB between DAS slots (the slot-1 swap test), reading the DAS supply voltage against its standard range, judging X-ray optical-system operation, and reading an offset-SD check taken with the reference signal cable disconnected against the "greater than 50 (REF channel)" threshold; the flow's own escalation points name the reconstruction system/scan control, DAS power supply, REF detector, main detector, Converter-16 PWB, and X-ray optical system/X-ray system as probable causes rather than a further field repair (skill assessment derived from flow content — not an OEM-stated skill level).
Steps
13 steps
Source
2D201-065E*D p.83
Full step-by-step for Troubleshoot large image SD
All 13 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 DAS guides
Acquire calibration data (NRA / air calibration)2 stepsCheck the DAS supply voltage (PCN1-PCN4)8 stepsRun the DCA offset data check (X-ray inhibit)7 stepsRun the DCA test-pattern check and read the Data Check menu3 stepsRun the DCA X-ray output check9 stepsDiagnose integrator-, gain-, and slice-thickness-dependent abnormalities4 steps
View all Aquilion 16 (TSX-101A) guidesSource: 2D201-065E*D p.83. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.