Hitachi HT-4139-28, Maintenance Manual

Page: 55 / 126

REV0 2010.02.15
-H7-22-
7.8.5.2 VIDEO Level
(1)Specify parameters and click the “RUN” button.
･
Video gain
：
All gain
（
default
）
･
Lamp mode1
：
Light on
（
default
）
･
Lamp mode2
：
Light off
（
default
）
･
Skeet face for measurement
：
Surface
（
default
）
･
Sensing direction(Y)
：
White
（
default
）
･
Specified step
：
0
（
default
）
･
Detection area 1 ~ 7500
（
default
）
If necessary, change parameter and perform this.
(2)Level of video will be displayed every a few second
To fix the screen, click the “Pause” button.
To finish display, click the “FINISH” button.
Sample1
Specified step: 0 / Sensing direction(Y): White
Sample2
Specified step: 4 / Sensing direction(Y): White
NOTE:
・
Values of the ODD
、
EVN are approximation at each gain.
・
at the Video gain “All gain”, the level will not change or if variation is large check the lamp condition.
・
If specified step is “0”, displayed level maybe about “0020”.
（
No output because it locates at the
reading position mirror
）
・
In case of the specified step 4, white with Y position, displayed level maybe as shown above “03FF
～
0000” and is getting reducing.
（
The gain is large at 03FF and display large value.
）
・
As a cause of problem, consider failure of the lower mirror (surface), the cover sheet (surface9, the
lower mirror (back), the cover glass (back), CPS615 P/K, the scanner ASSY, MAIN_P/K_ASSY.
As the position of white peak detection is reference, value out of specifications may be displayed.