CT scanners · CT PRO SPEED family

GE Healthcare CT Evolution: troubleshooting and error codes

The ServiceForge knowledge base holds 7 documented symptoms for the GE Healthcare CT Evolution, with 10 ranked causes, 50 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Calibration: DAS data transfer check

Verify DAS stability by monitoring test pattern data through CIF board. Check marking data bit patterns for CW/CCW scan modes, test mode status, scan speed, rotation direction, and axial/scout mode.

Ranked causes

1. DAS test function configuration and verification (common)
2. DAS box rear cover installation (common)

First check

Remove gantry front cover

Test point: Gantry front access
Expected: Front cover removed

12 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Filter curve test radiation

Verify filter curve response by comparing X-ray data with and without bow-tie filter. Measure mean data, calculate filter response curve, and verify smooth curve profile on display.

Ranked causes

1. Filter curve measurement and verification (common)
2. Filter curve display and verification (common)

First check

Perform AXIAL scan with filter

Test point: OFF LINE SCAN menu
Expected: Scan completed SERIES NO. 1 with bow-tie filter in place

7 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Linearity test

Verify DAS linearty by performing stationary scans with ADC board in different gain positions (8 for High A, 9 for High B). Compare data sets to ensure linear response across gain levels.

Ranked causes

1. ADC linearity verification at High A and High B gains (common)
2. Stationary scan with High B gain (common)

First check

Move gantry to zero degree tilt

Test point: Gantry tilt mechanism
Expected: Gantry at zero degree tilt position

14 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: DAS offset check

Verify DAS offset values during AXIAL scans in both CW and CCW directions. Check mean values and standard deviation fall within acceptable ranges with and without offset file correction.

Ranked causes

1. DAS offset measurement and verification (common)

First check

Switch ON Scan switch

Test point: Rear Gantry base Scan switch
Expected: Scan switch ON

7 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Operator Console board and connection verification caution

Verification that power is off, no foreign materials present, and all boards and cable connections are correctly seated per manufacturer specifications.

Ranked causes

1. Boards not firmly seated or cable connections incomplete (common)

First check

Power to Operator Console is OFF

Test point: Power switch
Expected: Power OFF

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Optional board slot configuration caution

Proper placement of SCSI and ETC optional boards in AUX1 (slot 8) and AUX2 (slot 9) slots based on quantity installed.

Ranked causes

1. Optional boards not in correct slot configuration (occasional)

First check

Optional boards installed in correct slots

Test point: AUX1 (slot 8) and AUX2 (slot 9)
Expected: Single board in slot 9; if two boards: SCSI in slot 8, ETC in slot 9

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector power-on warm-up caution

Ensure detector electronics are thermally stabilized before performing critical measurements. All functional checks require detector powered on for minimum duration.

Ranked causes

1. Detector thermal stabilization (common)

First check

Verify detector power and warm-up time

Test point: Detector power indicator and system clock
Expected: Detector powered ON for >2 hours minimum, ≥ 2 hours

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.