Brother MFC-L8850CDW Service Manual

2-62
Confidential
■ Error code 7300
In the case of printing by feeding paper from the paper tray 1, after the T1 paper feed sensor
detects paper pass, the registration front sensor does not detect paper pass after a set period
of time.
< User Check >
- Remove the jammed paper.
- Check if the paper tray 1 is closed correctly.
■ Error code 7400
In the case of printing by feeding paper from the T2 paper tray unit, after the T2 paper feed
sensor detects paper pass, the registration front sensor does not detect paper pass after a set
period of time.
< User Check >
- Remove the jammed paper.
- Close the paper tray 1 and T2 paper tray unit correctly.
Jam Tray 1
Pull the paper tray1 completely out of the machine and remove the jammed
paper.
Step Cause Remedy
1
Foreign object at the front of the
paper tray 1
Remove the foreign object.
2
T1 paper dust cleaning roller
installation failure
Re-assemble the T1 paper dust cleaning
roller.
3
Registration front actuator that
has come off or that has been
caught
Re-assemble the registration front
actuator.
4
Connection failure of the
registration front/rear sensor
PCB harness
Reconnect the registration front/rear
sensor PCB harness.
5
Registration front sensor failure Replace the registration front/rear sensor
PCB ASSY.
6
Paper feed related gear
damaged
Replace the main drive unit.
7
Main PCB failure Replace the main PCB ASSY.
Jam Tray 2
Pull the paper tray2 completely out of the machine and remove the jammed
paper.
Step Cause Remedy
1
Foreign object at the front of the
paper tray 1
Remove the foreign object.
2
Foreign object at the front of the
T2 paper tray unit
Remove the foreign object.
3
T1/T2 paper dust cleaning roller
installation failure
Re-assemble the T1/T2 paper dust
cleaning roller.
4
Registration front actuator that
has come off or that has been
caught
Re-assemble the registration front
actuator.
5
Connection failure of the
registration front/rear sensor
PCB harness
Reconnect the registration front/rear
sensor PCB harness.
6
Registration front sensor failure Replace the registration front/rear sensor
PCB ASSY.
7
Paper feed related gear
damaged
Replace the main drive unit.
8
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