Brother DCP-7090 Service Manual page 62


Vertical streaks
Step
1 Dirt inside of scanner glass
Dirt inside of first side/second
2
side scanner glass strip
First or second side CIS unit
3
failure
4 Scratch on scanner glass
Scratch on second side
5
scanner glass strip
 White streaks
<User Check>
• Clean the scanner glass or first side/second side scanner glass strip.
• Clean the document hold.
Step
1 Dirt inside of scanner glass
Dirt inside of first side/second
2
side scanner glass strip
First or second side CIS unit
3
failure
4 Scratch on scanner glass
Scratch on second side
5
scanner glass strip
<User Check>
• Clean the scanner glass or first side/second side
scanner glass strip.
• Clean the document hold.
Cause
Clean the inside of the scanner glass.
Clean the inside of the first side/second side
scanner glass strip.
Replace the first or second side CIS unit.
Replace the document scanner unit.
Replace the ADF unit.
Cause
Clean the inside of the scanner glass.
Clean the inside of the first side/second side
scanner glass strip.
Replace the first or second side CIS unit.
Replace the document scanner unit.
Replace the ADF unit.
Remedy
Remedy