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The ease of this purchase was a good start. The content of this manual was exactly all I needed to retore my Tandberg 64.
All of the mechanical and electrical information is contained in the manual and the quality of the document makes reading the data easy.
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I found this manual to be complete in every detail. Besides the schematic it has a complete set of alignment instructions which are easy to understand. It also includes a complete parts list as well as an explanation of how the power supply and safety shutdown circuits operate. Even a schematic of the tuner is included.
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The product was good and just what I needed, however I had moderate difficulty with the down load because the sight would not recognize my pass word. I was finally given a direct link to the manual and that worked.
IMAGE PROCESSING
17 May, 1999
2.2.3 AUTO IMAGE DENSITY (ADS)
[A]
A250D004.WMF
In the SBU
ADS prevents the background of an original from appearing on copies. The copier scans the image density area [A] detected by the ADS sensoras shown in the diagram. This corresponds to a few mm at one end of the main scan line. As the scanner scans down the page, the IPU on the BICU detects the peak white level for each scan line. The IPU determines the reference value for the A/D conversion for a particular scan line using the peak white level for that scan line. Then, the IPU sends the reference value to the reference controller circuit on the SBU. When scanning an original with a gray background, the density of the gray area is the peak white level density. Therefore, the original background will not appear on copies. ADS corrects for any changes in background density down the page, because peak level data is taken for each scan line. As with previous digital copiers, the user can select manual image density when selecting auto image density mode and the machine will use both settings when processing the original.
In the IPU
After the SBU process, the IPU board removes more background by adjusting the white level. If the user selects a �Service Mode� original type with the user tools, these two ADS process can be either enabled or disabled (SP4-936, SP4-937), and the amount of white level change can be adjusted (SP4-938).
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