
Section 6 -- Theory of Operation
6-23
2005 July Rev. B 7F3318
6-4-4.
Densitometer Module
The purpose of the Densitometer Module is to read and report film density values from:
•
Each step wedge in a calibration film.
•
The Dpatch (if used)
The Densitometer Module includes the following components:
•
Densitometer/Exit Sensor----This sensor is used to detect the leading and trailing edges of the film to
control the timing of density readings. It is used also to detect film jams at the exit of the film
processor. The sensor is located about 1 inch ahead of the densitometer emitter and detector in the
film path.
•
Light Source----This is an LED circuit that is positioned on the opposite side of the film path from a
detector on the Densitometer Board. The light from the LED, passing through the film, is detected to
provide an indication of the relative density of the image on the film. The LED is turned on, when
required, by the Slave Micro on the Densitometer Board.
•
Densitometer Board----This board contains a Slave Micro that communicates with the Master Micro on
the MCS Board to control density measurement and reporting. In addition to the Slave Micro, it
contains a photodetector that reads the light passing through the film, an A/D Converter that converts
the analog signal from the detector to digital data, and a PAL that performs timing and logic functions.
6-4-4-1.
Step Wedge Calibration
To perform a test calibration, the imager prints a test film that has 19 strips (or steps) of increasing optical
density. (See Figures 6-11 through 6-13 for configurations of the calibration sheets for the three sizes of
film used in the imager.) The densitometer measures the density of each step and uses the data as
feedback to the Automatic Image Quality Control (AIQC) system to create a Film Model (see paragraph
6-3-4-3). Each gray step is preceded by a fiducial consisting of a thin dark stripe followed by a thin light
stripe. These are used to locate the start of the next gray step.
Figure 6-11. 11 by 14 Inch Calibration Sheet
Содержание DryView 8150
Страница 1: ...SERVICE MANUAL Kodak DryView 8150 LASER IMAGER 1961259 7F3318 07 05 ...
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Страница 34: ...Service Manual 2 14 7F3318 2005 July Rev B 6 Remove the 2 SCREWS and 2 TAGS 6 ...
Страница 50: ...Service Manual 2 30 7F3318 2005 July Rev B 6 Check each parameter ...
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Страница 196: ...Service Manual 5 14 7F3318 2005 July Rev B Figure 5 9 Cleaning the HEAT SHIELD and ROLLERS ...
Страница 200: ...Service Manual 5 18 7F3318 2005 July Rev B Figure 5 11 Adjusting the DIVERTER ...
Страница 236: ...Service Manual 6 34 7F3318 2005 July Rev B Figure 6 17 Pickup Operation Sheet 1 of 3 ...
Страница 237: ...Section 6 Theory of Operation 6 35 2005 July Rev B 7F3318 Figure 6 17 Pickup Operation Sheet 2 of 3 ...
Страница 238: ...Service Manual 6 36 7F3318 2005 July Rev B Figure 6 17 Pickup Operation Sheet 3 of 3 ...
Страница 239: ...Section 6 Theory of Operation 6 37 2005 July Rev B 7F3318 Figure 6 18 Load Platen Operation Sheet 1 of 2 ...
Страница 240: ...Service Manual 6 38 7F3318 2005 July Rev B Figure 6 18 Load Platen Operation Sheet 2 of 2 ...
Страница 241: ...Section 6 Theory of Operation 6 39 2005 July Rev B 7F3318 Figure 6 19 Expose Operation ...
Страница 242: ...Service Manual 6 40 7F3318 2005 July Rev B Figure 6 20 Unload Platen Operation ...
Страница 243: ...Section 6 Theory of Operation 6 41 2005 July Rev B 7F3318 Figure 6 21 Processor Operation Sheet 1 of 2 ...
Страница 244: ...Service Manual 6 42 7F3318 2005 July Rev B Figure 6 21 Processor Operation Sheet 2 of 2 ...
Страница 245: ...Section 6 Theory of Operation 6 43 2005 July Rev B 7F3318 Figure 6 22 Front Door Open Operation Sheet 1 of 2 ...
Страница 246: ...Service Manual 6 44 7F3318 2005 July Rev B Figure 6 22 Front Door Open Operation Sheet 2 of 2 ...
Страница 247: ...Section 6 Theory of Operation 6 45 2005 July Rev B 7F3318 Figure 6 23 Front Door Close Operation ...
Страница 252: ...Service Manual 6 50 7F3318 2005 July Rev B Figure 6 27 Sequence of AIQC and GSM Functions ...
Страница 288: ...Service Manual 7 36 7F3318 2005 July Rev B 7 4 Next Page 12 075 28 506 01 910 from DRE Figure 7 3 MCS Self Test Startup ...
Страница 292: ...Service Manual 7 40 7F3318 2005 July Rev B Next Page 21 921 21 921 Figure 7 5 FILM FEEDER MODULE Diagnostics Sheet 3 ...
Страница 294: ...Service Manual 7 42 7F3318 2005 July Rev B Prev Page Next Page 29 924 29 924 Figure 7 7 DENSITOMETER MODULE Diagnostics ...
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