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10) Focus Adjustment (See Figures 10 and 11.)
Move the Lens Unit so that the display waveform is sharp as far as possible (Figure 11) while monitoring the
oscilloscope display. After that, adjust the focus and fix screw 4 (Figure 10).
* Insufficient focus adjustment may cause an error to occur in the offset correction of calibration de-
scribed later.
4
11) Confirmation of three colors
Move the sheet to the position where nothing is written. (The signal that was confirmed and adjusted until now
is a green signal.)
Connect CH1 of an oscilloscope to J5 and J3 and confirm that the three waveforms of RGB signals are almost
the same in shape. Ignore the level of each waveform in this case.
Perform the right-and-left swing adjustment again if each level differs.
However, the CCD board is defective if a level remarkably drops in the position where nothing is written.
Fig,10
Fig.11
20
ADJUSTMENT
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