Brother MFC-L8850CDW Service Manual

2-94
Confidential
■ Paper jam at the MP tray
< User Check >
- Check if the paper is loaded into the MP tray correctly.
- Turn back the paper loaded in the MP tray or change the orientation of the paper by 180°.
- Adjust the paper guide corresponding to the paper size.
- Check if too much paper is loaded in the tray.
- Check if the thickness of the paper is 60 to 163 g/m
2
.
- Fan the stack of paper well and reinsert the papers into the paper tray.
■ Paper jam at the paper feeding section at the center of the machine
< User Check >
- Check if the paper is loaded into each paper tray correctly.
- Turn back the paper loaded in each paper tray or change the orientation of the paper by 180°.
- Adjust each paper guide in accordance with the paper size.
- Check if too much paper is loaded in the tray.
- Check if the thickness of the paper is 60 to 105 g/m
2
.
- Fan the stack of paper well and reinsert the papers into each paper tray.
- Check that the belt unit is properly set.
- Replace the drum unit.
- Replace the belt unit.
Step Cause Remedy
1 Foreign object around MP tray Remove the foreign object.
2 MP registration front actuator
coming off
Re-assemble the MP registration front
actuator.
3 Connection failure of the MP
registration front sensor PCB
harness
Reconnect the MP registration front
sensor PCB harness.
4 MP paper empty/registration
front sensor failure
Replace the MP paper empty/registration
front sensor PCB ASSY.
5 Main motor failure Replace the process drive unit.
6 Paper feed unit failure Replace the paper feed unit.
7 Fuser unit damaged Replace the fuser unit.
8 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Foreign object inside machine Remove the foreign object.
2 Eject actuator coming off Re-assemble the eject actuator.
3 Fuser cover installation failure Re-assemble the fuser cover.
4 Connection failure of the eject
sensor PCB harness
Reconnect the eject sensor PCB harness.
5 Eject sensor failure Replace the eject sensor PCB ASSY.
6 Fuser drive gear Z25 damaged Replace the fuser drive gear Z25.
7 Main motor or process motor
failure
Replace the process drive unit.
8 Fuser unit failure Replace the fuser unit.
9 Main PCB failure Replace the main PCB ASSY.

Brother MFC-L8850CDW Specifications

General

Type	all in one
Color	white
Tray Capacity	300
Automatic Document Feeder Capacity	50 sheets
Paper Size	8.5"x14"
Paper Handling	up to 300 sheets
Color Print Speed	32 pages per minute
Mono Print Speed	32 pages per minute
Print Resolution Color	up to 2400 x 600
Maximum Number of Pages Per Month	unknown
Scanner Type	flatbed
Scan Resolution	up to 2400 x 1200
Copier Resolution Mono	up to 600 x 600
Copier Resolution Color	up to 600 x 600
Cartridges	tn331bk, tn331c, tn331m, tn331y
Number Of Cartridges	4
Internal Memory	yes
Memory Card	no
Network	wired, wireless
Connectivity	usb, google cloud print
OS Compatibility	windows, mac os, linux
Mobile Devices Connection	yes

Weight and Dimensions

Height	19.3 inches
Width	20.7 inches
Net Weight	67.4 pounds