Brother DCPJ525W Service Manual page 127

Scanning position failure
(1) ADF
Step
1 Scanning start position out of
alignment
2 Document scanning position
actuator caught on the
surrounding parts
(2) Document cover
Step
1 Scanning start position out of
alignment
2 CIS unit defective
Dark
Step
1 White level data defective
2 CIS unit defective
3 Main PCB defective
User Check
- Check that the document is placed correctly on the
document cover.
Cause
Cause
User Check
- Check if the contrast is set to "Dark."
- Avoid placing the machine in an environment where it will be subjected to
direct sunlight.
Cause
2-82
Solution
Adjust the scanning start position with Function
code 54. Refer to Chapter 5, Section
Check and reposition the document scanning
position actuator.
Solution
Adjust the scanning start position with Function
code 54. Refer to Chapter 5, Section
Replace the document scanner unit.
Solution
Obtain the white level data with Function code 55.
Refer to Chapter 5, Section
Replace the document scanner unit.
Replace the main PCB ASSY.
1.4.15.
1.4.15.
1.4.16.
Confidential