Brother
Office

Model #MFC7420 Brother fax machine

Here are the repair parts and diagrams for your Brother MFC7420 fax machine. 

The diagram(s) below can help you find the right part.  If you’d like help, we invite you to call our customer service number at the top of the page, or click chat.

On this page, you can also find any manuals, installation guides and error code tables associated with this model.

For advice on diagnosing problems with appliances, lawn & garden equipment and other products, check out the videos, repair guides and articles in our DIY section.

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Showing 10 of 75 parts

Thermistor Assembly

#1-6

Fixing assy Diagram

Thermistor assembly

Part #LM4018001

The manufacturer no longer makes this part, and there's no substitute part

REGIST FRNT SPRING

#11

Frame assy Diagram

Regist frnt spring

Part #LM4285001

The manufacturer no longer makes this part, and there's no substitute part

Fuser Unit

#1

Fixing assy Diagram

Fuser unit

Part #LM4573001

The manufacturer no longer makes this part, and there's no substitute part

JOINT COVER ASSY

#1

Cover assy Diagram

Joint cover assy

Part #LF6133001

The manufacturer no longer makes this part, and there's no substitute part

PULL ARM L

#15

Cover assy Diagram

Pull arm l

Part #LF6145001

The manufacturer no longer makes this part, and there's no substitute part

ADF COVER

#1-21

Adf Diagram

Adf cover

Part #LF6179001

The manufacturer no longer makes this part, and there's no substitute part

SCANNER UNIT

#1

Scanner Diagram

Scanner unit

Part #LF6733001

The manufacturer no longer makes this part, and there's no substitute part

NCU PCB ASSY

#3

Pcb Diagram

Ncu pcb assy

Part #LG5857001

The manufacturer no longer makes this part, and there's no substitute part

Main PCB Assembly

#1

Pcb Diagram

Main pcb assembly

Part #LG5861001

The manufacturer no longer makes this part, and there's no substitute part

Rlr Shaft

#1-24

Adf Diagram

Rlr shaft

Part #LE2471001

The manufacturer no longer makes this part, and there's no substitute part