Automatic Brightness Stabilization
Fault Isolation
WARNING: The following procedures generate live x-rays. Take appropriate precautions against
undue exposure.
Failure Possible Cause Remedy
Loss of video to Image Processor. (Camera,
Intensifier, Video Cables, Video Control PCB).
Replace failed component or assembly. Black image –
Technique servos to
maximum (120 kVp).
Possible loss of X-ray output (Generator Failure). Troubleshoot and repair X-ray generator.
Loss of video to Image Processor in such a way that
video amplitude is constantly high. (Camera, Video
Control PCB).
Replace failed component or assembly. White Image –
Technique servos to
minimum (40 kVp).
Possible loss of X-ray control. (excessive output, not
controllable).
Troubleshoot and repair X-ray generator.
Calibration of TV Monitors may be incorrect. Perform TV monitor calibration (see
Calibration chapter in this manual).
Light or Dark Image with
working ABS.
(Technique adjusts and
stabilizes as subject
thickness is varied).
Possible failure in Video Controller PCB, reporting
incorrect video amplitude to Image Processor.
Replace Video Controller PCB.
Low Contrast Images Imaging technique. When imaging heavy anatomy,
use collimation to avoid very bright non-attenuated
areas, or reposition.
Applications training.
5
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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