Slide Scanner Repair Manual Diagnostics and Troubleshooting
144
Dark Noise II Test
Note: A stand-alone version of this test can be run to provide graphical feedback and
additional information.
This test provides statistical and Fourier noise performance of dark response. The test
analyzes the slide scanner’s performance for noise and streaks in the dark. A description of
this test can be found in the stand-alone test section. Table 5-13 interprets the measurements
of the Dark Noise II Tests.
Table 5- 13. Interpreting Measurements of the Dark Noise Tests
Test Name Specification Specification Specification Suggested Repair
SS35 w/Filter Wheel SS35ES SS 35 Plus
Min Fixed Dark - -13 - 5 Same
Dark Set Pt (R,G,B)
Mean Fixed Dark - +10 + 2 Same
Dark Set Pt (R,G,B)
Max Fixed Dark - +13 + 5 Same
Dark Set Pt (R,G,B)
Mean Single Pixel Max = 2.5 Max = 4.5 • Look for grounding
Std Dev(R,G,B) or shielding
problems.
• Defective main
controller PC board.
• Defective CCD
sensor PC board.
Max Single Pixel Max = 13 Max = 5.00 Max = 9.00 • Look for grounding
Std Dev (R,G,B) or shielding
problems.
• Defective main
controller PC board.
• Defective CCD
sensor PC.
Max Peak Max = 15000 Max = 312.0 • Bad grounding of
Fixed Freq the power supply
shield.
• Defective main
controller PC board.
• Defective CCD
sensor PC.
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