Polaroid SprintScan SS35, Repair Manual

Page: 134 / 187

Slide Scanner Repair Manual Diagnostics and Troubleshooting
134
Test Report
The Test Report is a window with a scrolling menu that by default shows the Resolution Test
results. These results will be useful as a double-check that resolution tests “pass” after mag
and focus adjustments are made to solve color registration problems. Since the Magnification
(Mag) changes with focus adjustment, the Analysis window panel containing Mag results is
just below the Test Report.
Right and Left Resolution Test Report
Vertical and Horizontal (RGB) Results: Figure 5-11 shows 12 results (6 for the left and 6 for
the right) that are all within the spec of > .70
Color Registration Report
If you use the Test Report window scroll bar and scroll down you will see the raw test results
from the motion test. These are the same results as shown on the main scanner test panel.
The results with derived information are reported, again, in the Analysis Window.
Test Constraints
Test limits (specifications) are shown in this area for reference purposes.
Analysis
The Motion Analysis report provides information on the data gathered and the corrective
actions to take after running a Motion and Color Registration test. An experienced user will be
able to analyze the results and decide whether the problems found are caused by mechanical
factors, optical factors or, a combination of the two.
Peak (R-B) Misalignment result - 0.63 pixels which is within the spec of 1.1 pixel or, less.
This means that there is a red to blue color shift of 0.63 pixels somewhere in the image.
Note: The specification limit for this part of the test is listed at the bottom left of the test
panel under TEST constraints as Peak Misregistration.
You can see the 0.63 pixel peak graphically on the color misalignment graphs. Notice that the
peak appears at line # 900 for the “left side” and is the highest one (with respect to the 0.0
point) and with it’s peak just below the -0.6 point. This is the highest peak when considering
both left side and right side misalignment graphs.
Figure 5-12 shows the left and right side of the chevron pattern which is used to measure the
peak shown on the graph. Notice the parallel lines drawn on the target image. This two areas
mark the points where measurements are taken to calculate the graphical and numerical
data.