Brother MFC-L8850CDW Service Manual

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Confidential
4.11 Document Feeding Problems
4.11.1 No feeding
< User Check >
- Load the document all the way, and check that the LCD display is changed.
- Check whether the number of loaded documents exceed the specified number.
- Check whether the ADF cover is properly closed.
4.11.2 Double feeding
< User Check >
- Check whether the document is thicker than the specifications.
- Check whether the number of loaded documents exceed the specified number.
Step Cause Remedy
1 Coming off of document
detection actuator
Re-assemble the document detection
actuator.
2 Coming off of ADF cover
actuator
Re-assemble the ADF cover actuator.
3 Connection failure of the ADF
motor harness
Reconnect the ADF motor harness.
4 Connection failure of the ADF
cover/document detection
sensor PCB harness
Reconnect the ADF cover/document
detection sensor PCB harness.
5 Document separate roller
failure
Replace the document separate roller ASSY.
6 ADF cover/document
detection sensor failure
Replace the ADF cover/document detection
sensor PCB ASSY.
7 ADF motor failure Replace the ADF motor.
8 ADF drive gear damaged Replace the ADF unit.
9 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 ADF separation pad worn out Replace the ADF separation pad.

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