Slide Scanner Repair Manual
Diagnostics and Troubleshooting
150
Part two of this test checks for the min or max variation from the dark set point. Any single
pixel which deviates a large amount from the calibrated dark is expected to produce a
streak. The Min or Max Fixed Dark - Dark Set Point is checked against the Min Or Max
Fixed Dark - Dark Set Point target in the constants file.
Dark Uniformity Response (Noise)
In addition to the column average of each pixel of each color, the test calculates a standard
deviation over the 64 line sample for each pixel. In the stand-alone version, this single
pixel standard deviation or column standard deviation response is plotted vs. pixel
number as shown in Figure 5-16. Similar to the test of the column means against the dark
set point, the standard deviations are recorded in terms of the A/D converter’s LSB’s so
that the SS35 Plus numbers are four times as sensitive as those from the SS35ES.
Figure 5-16. Single pixel standard deviation vs. pixel number
The SS35 Plus DMT units indicate that we can expect single pixel standard deviations from
the average pixel around 2 to 3 LSB’s. Higher responses occur when:
•
Light levels or CCD signal levels are low and must be gained up
•
When there is problem with grounding or shielding
•
When the sensor and/or its electronics are defective
The test checks that the Mean Single Pixel Std Dev, and the worst response in the
sampled pixels, or the Max Single Pixel Std Dev are less than the constraints in the
constants file.
Содержание SprintScan SS35
Страница 9: ...Slide Scanner Repair Manual Scanner Overview 9 1 Scanner Overview...
Страница 31: ...Slide Scanner Repair Manual FunctionalDescription 31 2 Functional Description...
Страница 50: ...50 Slide Scanner Repair Manual Calibration and Adjustments 3 Calibration and Adjustments...
Страница 72: ...72 Slide Scanner Repair Manual Parts Replacement 4 Parts Replacement...
Страница 96: ...96 SlideScannerRepairManual Diagnostics and Troubleshooting 5 Diagnostics and Troubleshooting...
Страница 157: ...157 Slide Scanner Repair Manual System Diagrams 6 System Diagrams...
Страница 159: ...159 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 1 of 4...
Страница 160: ...160 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 2 of 4...
Страница 161: ...161 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 3 of 4...
Страница 162: ...162 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 4 of 4...
Страница 163: ...163 Slide Scanner Repair Manual System Diagrams AC Inverter PC Board...
Страница 164: ...164 Slide Scanner Repair Manual System Diagrams Image Sensor CCD PC Board Sheet 1 of 3...
Страница 165: ...165 Slide Scanner Repair Manual System Diagrams Image Sensor CCD PC Board Sheet 2 of 3...
Страница 166: ...166 Slide Scanner Repair Manual System Diagrams Image Sensor CCD PC Board Sheet 3 of 3...
Страница 167: ...167 Slide Scanner Repair Manual System Diagrams SS35 SS35 ES Main Controller PC Board Sheet 1 of 8...
Страница 168: ...168 Slide Scanner Repair Manual System Diagrams SS35 SS35 ES Main Controller PC Board Sheet 2 of 8...
Страница 169: ...169 Slide Scanner Repair Manual System Diagrams SS35 SS35 ES Main Controller PC Board Sheet 3 of 8...
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Страница 172: ...172 Slide Scanner Repair Manual System Diagrams SS35 SS35 ES Main Controller PC Board Sheet 6 of 8...
Страница 173: ...173 Slide Scanner Repair Manual System Diagrams SS35 SS35 ES Main Controller PC Board Sheet 7 of 8...
Страница 174: ...174 Slide Scanner Repair Manual System Diagrams SS35 SS35 ES Main Controller PC Board Sheet 8 of 8...
Страница 175: ...175 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 1 of 9...
Страница 176: ...176 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 2 of 9...
Страница 177: ...177 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 3 of 9...
Страница 178: ...178 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 4 of 9...
Страница 179: ...179 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 5 of 9...
Страница 180: ...180 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 6 of 9...
Страница 181: ...181 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 7 of 9...
Страница 182: ...182 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 8 of 9...
Страница 183: ...183 Slide Scanner Repair Manual System Diagrams SS35 PLUS Main Controller PC Board Sheet 9 of 9...
Страница 184: ...Slide Scanner Repair Manual Appendix 184 Appendix...
Страница 185: ...Slide Scanner Repair Manual Appendix 185 Appendix Contents SS35 35ES Firmware Hardware Update History 186...