Brother HL-S7000DN Series, Service Manual

Page: 146 / 460

2-118
Confidential
4.3.2 Troubleshooting image defect
Image defect related problems are user recoverable if following the User Check items.
If the same problem occurs again, follow each procedure in the order of the number described
in the Step column in the tables below.
■ Light
■
Faulty registration
■
Dark
<User Check>
- If the whole page is light, ink save mode may be ON. Turn OFF the ink
save mode.
- Adjust density by density adjustment.
- Perform head cleaning.
Step Cause Remedy
1 Old ink Replace the Ink cartridge and clean the head.
2 Ink head failure Replace the ink head.
3 Power supply PCB failure Replace the power supply PCB.
4 Engine PCB failure Replace the engine PCB ASSY.
5 Main PCB failure Replace the main PCB ASSY.
<User Check>
- Check whether appropriate paper type is selected on
the driver.
Step Cause Remedy
1 Wrong write alignment value Refer to "Printing of the test pattern for the
print start position and adjustments" of
"1.4.18 Print adjustment (Function code 68)"
in Chapter 5
and reenter the value.
2 Dirt on print starting sensor Wipe the print starting sensor.
<User Check>
- Adjust concentration by concentration adjustment.
Step Cause Remedy
1 Ink head PCB failure Replace the ink head.
2 Engine PCB failure Replace the engine PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
-