Brother DCP-L8400DN Service Manual

2-63
Confidential
■ Error code 7700
After the first side is printed in 2-sided printing mode, the registration front sensor does not
detect paper pass after a set period of time.
< User Check >
- Remove the jammed paper.
- Check if the back cover is closed correctly.
- Check if the paper tray 1 is closed correctly.
■ Error code 8402
While the T2 paper tray unit is open state, print or adjustment operation was attempted.
< User Check >
- Check if the T2 paper tray unit is closed correctly.
Jam 2-sided
Pull the paper tray completely out of the machine. Check inside the machine
towards the rear. Or open the Back Cover to remove the jammed paper.
Step Cause Remedy
1 Foreign object inside the duplex
path
Remove the foreign object.
2 Foreign object inside the duplex
path of the paper tray 1
Remove the foreign object.
3 Fuser cover installation failure Re-assemble the fuser cover.
4 Back cover installation failure Re-assemble the back cover.
5 Main PCB failure Replace the main PCB ASSY.
No Tray
The paper tray cannot be detected, re-install Tray2.
Step Cause Remedy
1 T2 paper feed actuator that has
come off or that has been caught
Re-assemble the T2 paper feed actuator.
2 Main PCB failure Replace the main PCB ASSY.

Brother DCP-L8400DN Specifications

General

Brand	Brother
Model	DCP-L8400DN
Category	All in One Printer
Language	English