QDR
4500 Technical Manual
6-6
Vertical Stripe
This type of display problem is most likely related to the detector subsystem. The following
suggestions apply to a QDR 4500 system that exhibits a vertical stripe in the display:
Check... Refer to...
Detectors SUSQ in graphic mode to check for signal
strength and noise (Section 9)
Narrow vertical stripe - bad detector
Data Acquisition System
heading, Section 2, for
block diagrams and interconnection charts
Wide vertical stripe - bad Integrator/ Multiplexor
or ADC board
for the Detector, Integrator/Multiplexor and
Analog/Digital Converter boards
Foreign matter (especially metallic) anywhere in
the X-ray beam path in the aperture slit,
collimator cup, etc.
Figure 5-8, 5-19
Also...
Run the hardware checker SQCHECK, 080-0476, F/S Tools disk
Horizontal Stripe
This type of display problem is most likely related to the line voltage or X-ray subsystem. The
following suggestions apply to a QDR 4500 system that exhibits a horizontal stripe in the
display:
Check... Refer to...
Line voltage
Check Power Line Voltage
heading, Section 3
Tube kV Peak Potential
Check Tube kV Peak Potential
heading, Section 3
Tube Current
Tube Current
heading, Section 3
Filter drum turning Figures 5-8, 5-18 through 5-23
Filter drum belt Figures 5-18, 5-21
Green LEDs on C-Arm Interface Figure 5-8, Appendix A
Banding–variations in horizontal
stripe intensity, usually spread
across display.
X-ray controller, figure 5-8
Also...
Run the hardware checker SQCHECK, 080-0476, F/S Tools disk
Noise
The term "noise" is used here to describe any flaw, or irregularity in the display (dots, specks,
uneven lines, etc.) or similar problem. The following suggestions apply to a QDR 4500 system
that exhibits noise in the display:
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