20 Most Recent Canon ImageCLASS MF4370dn Laser All-in-One Printer - Page 7 Questions & Answers

E840 is an error detection to the fixing inlet home position sensor.

PS63 (Fixing Inlet sensor) and PS66 (Fixing Inlet HP sensor)

may be caused by a poor connection on the front door switch. Try inspecting & re-seating the connection at the front door open/close switch=
++ make sure the front door is not vibrating away from the front door open/close switch (MSW7).
The door Magnet Action Catch may not properly be holding the door closed.

++ if paper is stuck in unit 1 frame side connector you might get a E840. If no paper is found in the connector check the connector for damage or cracks. Frame side connector assembly (FM2-5091-000).

Canon imageCLASS... | Answered on Aug 31, 2018

Hi, I have the same problem, did you solve the problem?

Canon imageCLASS... | Answered on Jul 09, 2018

Not finding what you are looking for?
Canon ImageCLASS MF4370dn Laser All-in-One Printer Logo

150 questions posted

Ask a Question

Usually answered in minutes!

Top Canon Office Equipment & Supplies Experts

old marine
old marine

Level 3 Expert

2312 Answers

Muntejaya Ginting
Muntejaya Ginting

Level 3 Expert

10422 Answers

Tareq Bin Mostaq...
Tareq Bin Mostaq...

Level 3 Expert

1449 Answers

Are you a Canon Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

imageCLASS Canon

  • imageCLASS Canon

Most Popular Question

reset canon ir 2420 bios mode wait

  • Office Equipment & Supplies