106
Slide Scanner Repair Manual
Diagnostics and Troubleshooting
Calibration
The two (2) hexadecimal digits assigned to calibration type errors indicate a failure of the slide
scanner's self-test (calibration) diagnostics routine.
The first calibration is performed at the first requested scan. It is also performed when the slide
scanner detects a specified amount of drift in the lamp or front end during subsequent scans.
Note: SS35 PLUS calibrates fully before each scan.
The following types of adjustments occur during the first calibration:
•
Base line integration time to ensure a minimum signal and mitigation of saturation
•
Analog gain and offset for base line neutral settings
•
Digital uniformity offset calibration
•
Digital uniformity gain calibration
•
Bad pixel identification
Subsequent scans may require additional analog gain and offset and/or integration time
adjustments to accommodate white points requested by the host or film tables, as a function of the
specific calibration algorithms.
A drift check is performed with each scan to verify the stability of the front end. Each calibration
that requires a significant change in the front end settings necessitates a recalculation of the
digital uniformity offset correction during the actual scan.
Causes of calibration failure are usually due to a defective lamp, obstructions in the optical path, a
defective sensor (CCD) PC board, a defective main controller PC board, defective filter, or
misaligned filter wheel (Only for original SS35 and SS35 ES up to serial no. B6xxxxxxD).
Refer to Table 5-4 for a list and definition of all calibration type error codes.
Before attempting to correct a calibration error check the video output signal (Figure 5-1) from
the provided test points on the main controller PC board to make sure no irregularities exist.
SS35/SS35 ES Test Points
SS35 PLUS Test Points
J8, pin 2 - LSYNC
LSYNC
J2, pin 8 - Video
ADIN
Summary of Contents for SprintScan SS35
Page 9: ...Slide Scanner Repair Manual Scanner Overview 9 1 Scanner Overview...
Page 31: ...Slide Scanner Repair Manual FunctionalDescription 31 2 Functional Description...
Page 50: ...50 Slide Scanner Repair Manual Calibration and Adjustments 3 Calibration and Adjustments...
Page 72: ...72 Slide Scanner Repair Manual Parts Replacement 4 Parts Replacement...
Page 96: ...96 SlideScannerRepairManual Diagnostics and Troubleshooting 5 Diagnostics and Troubleshooting...
Page 157: ...157 Slide Scanner Repair Manual System Diagrams 6 System Diagrams...
Page 159: ...159 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 1 of 4...
Page 160: ...160 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 2 of 4...
Page 161: ...161 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 3 of 4...
Page 162: ...162 Slide Scanner Repair Manual System Diagrams Power Supply Specification Sheet 4 of 4...
Page 163: ...163 Slide Scanner Repair Manual System Diagrams AC Inverter PC Board...
Page 164: ...164 Slide Scanner Repair Manual System Diagrams Image Sensor CCD PC Board Sheet 1 of 3...
Page 165: ...165 Slide Scanner Repair Manual System Diagrams Image Sensor CCD PC Board Sheet 2 of 3...
Page 166: ...166 Slide Scanner Repair Manual System Diagrams Image Sensor CCD PC Board Sheet 3 of 3...
Page 184: ...Slide Scanner Repair Manual Appendix 184 Appendix...