Brother ADS-3000N Service Manual page 38

 Vertical streaks
Step
First side or second side CIS unit
1
failure
 White vertical streaks
Step
First side or second side CIS unit
1
failure
 Hue defect
Step
Color parameter failure
1
Dirty calibration sheet
2
First side or second side CIS unit
3
failure
4 Main PCB failure
<User Check>
- Clean the CIS glass.
- Clean the feeding path.
Cause
<User Check>
- Wipe the first and second side CIS glass four times in the same
direction with a cleaning cloth.
- Clean the feeding path.
Cause
<User Check>
- Clean the document glass or CIS glass.
Cause
2-19
Remedy
Replace the first side or second side CIS
unit.
Remedy
Replace the first side or second side CIS
unit.
Remedy
Execute the maintenance mode function
"Acquire white level data and set CIS scan
area". (Refer to "1.3.5" in Chapter
Replace the calibration sheet with a new
one.
Replace the first side or second side CIS
unit.
Replace the main PCB ASSY.
5.)
Confidential