Brother DCP-J552DW Service Manual page 77

■ Error Code 90
Disc Tray hits at the back
Disc tray collided against an obstacle in the rear of the machine.
<User Check>
- Leave at least 100 mm (4 inches) of free space behind the machine.
- Remove foreign materials from the rear of the machine.
- Remove foreign materials around the jam clear cover.
- Check if the jam clear cover is properly closed.
- Remove recording paper within the recording paper feeding path.
Step
1 Foreign materials in the recording
paper feeding path
2 Chute cover not properly attached
3 PF encoder disk stained
4 Disc tray defective
5 Flushing guide stained
6 PF encoder sensor defective
7 Paper feed roller defective
8 Paper width sensor defective
9 Main PCB defective
Cause
Remove foreign materials.
Properly attach the chute cover.
Clean the PF encoder disk.
Replace the disc tray.
Replace the PF encoder disk and clean the flushing
guide. (Refer to
Replace the PF encoder sensor PCB ASSY.
Replace the engine unit.
Replace the carriage PCB ASSY.
Replace the main PCB ASSY.
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Solution
Chapter 3, Section 1)
LCD
Confidential