Completely Black, Completely White, All Streaks; Too Dark, Too Light - Canon imageFORMULA DR-X10C Service Manual

CHAPTER 5 TROUBLESHOOTING
Note: There are times when, depending on the type of image and settings, document reproduci-
bility becomes poor. In such case, the image may be improved by changing the settings.

1. Completely Black, Completely White, All Streaks

Completely Black, Completely White, or All Streaks are output.
Cause/faulty
location
Document setting
"Brightness" setting
System
Reading unit
Control PCB

2. Too Dark, Too Light

Image does not look appropriate due to improper brightness.
Cause/faulty
location
"Brightness" setting
"Contrast" setting
5-34
Step Check item
1 Was the document set with
the surface facing down?
If not, the back side will be
scanned.
2 Is the "Brightness" setting
appropriate?
3 Is the problem solved when
the scanner power is reset
and the computer is re-
started?
4 Are the reading related ca-
bles connected proparly ?
5 Is the problem solved when
the reading glass is re-
placed?
6 Is the problem solved when
the control PCB is re-
placed?
Table 5-602
Step Check item
1 Is the "Brightness" properly
set?
The brightness should be
set to "128" in normal case
but may be required to
change according to the
type of document.
2 Is the "Contrast" properly
set?
The default setting is "4".
Table 5-603
COPYRIGHT © CANON ELECTRONICS INC. 2008
Result Action
NO Properly set the docu-
ment.
NO Change the setting.
Also change "Contrast"
if necessary.
YES End.
NO Connect properly.
YES End.
YES End.
Result Action
NO Change the setting.
NO Change the setting.
CANON DR-X10C FIRST EDITION