Question about Brother MFC 420CN All-In-One InkJet Printer

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OPC belt sensor

Brother MFC 9420CN. Printer had a message "replace OPC belt". So I replaced the OPC belt. But after the message read "No OPC belt. Install the OPC belt". Originally I was told by a Brother technician that the problem was a faulty OPC belt. So he sent me a new one. But when I installed the new OPC belt, it had the same message. After this I was told that I needed a new OPC belt sensor. It does not make sense because before installing the new OPC belt I assumed the sensor was working fine because it said "replace OPC belt". What is going on?

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  • rwm4203 Apr 13, 2009

    Brother HL-1200 message read "replace OPC belt" - bought new one and installed, message won't go away.

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Posted on May 21, 2009

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1 Answer

How do I reset the OPC belt on MFC-9420CN using the menu?


hl-2700" OPC Reset
press GO and "+" at same time
press "+" until OPC BELT appears
press "SET"
that will reset the counter on the expensive OPC.
Since the "MFC-9420CN" is build on the same chassis and engine, the "OPC belt reset for the 9420CN" is as follows:
Press 1 and 7 at the same time
Press 1 to reset the life counter.

Oct 20, 2010 | Brother MFC-9420CN All-In-One Laser...

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OPC belt has 78% left -cant rid the problem


Look at the OPC belt edges, there's a shiny spot that passes thru a sensor, a can of air should blow out the sensor, carefully! When the sensor can't see the timing spot you get that error. You may have to replace the OPC since companies are imbedding a chip that tells the machine when they're used up.

Sep 01, 2009 | Brother MFC-9420CN All-In-One Laser...

1 Answer

OPC belt is replaced and has 100% life but the OPC


make sure all components are properly seated. also try turning the printer off and waiting a few minutes and turn back on.

Aug 19, 2009 | Brother MFC-9420CN All-In-One Laser...

1 Answer

MFC-9420CN All-In-One Laser Printer Install OPC belt message


Perhaps your OPC belt is at the end of its life and needs replacing

Apr 07, 2009 | Brother MFC-9420CN All-In-One Laser...

1 Answer

Brother MFC 9420cn printer message


Check to make certain that the OPC belt is both seated correctly and that it is not damaged as even though it may have what you consider to be sufficient life left in it, if damaged, it needs to be replaced.

Apr 07, 2009 | Brother MFC-9420CN All-In-One Laser...

1 Answer

NO OPC BELT on MFC-9420cn


The opc sensor is not sensing the belt. Open the front cover and remove all the toner trays. You will see the green OPC and the sensor is located in the left upper corner. Also open the top cover and remove the OPC. Clean the sensor with a soft bristle brush. Also make sure the OPC left side is free of toner deposits. This may incorrectly trigger the OPC position sensor. Hope this helps.

no-opc-belt-mfc-9420cn-grua3dqrdj4m0mpexfswu5ak-2-3.jpg

Jan 14, 2009 | Brother MFC-9420CN All-In-One Laser...

5 Answers

Brother MF 9420CN is asking for troubleshooting and routine maintenance 'unable to print'


Via the control panel (This is a Factory Reset)
  1. Make sure the machine is not operating, then disconnect all the cables from the machine (except power cable).
  2. Press the Menu or Menu/Set key on the control panel.
  3. Press up or down navigation key to select LAN and press Set or Menu/Set.
  4. Press up or down navigation key to select Factory Reset and press Set or Menu/Set.
  5. Press 1 to select "Reset".
  6. Press 1 to select "Yes".
  7. The machine will re-start, re-connect cables once this is complete.

Jan 21, 2008 | Brother MFC-9420CN All-In-One Laser...

1 Answer

MFC 9420CN


As far as the OPC belt - don't replace it until you start seeing ghosts and image defects! Reset it by:

Press 1 and 7 at the same time
Press 1 to reset the life counter.

Jan 03, 2008 | Brother MFC-9420CN All-In-One Laser...

4 Answers

MFC-9420 Replace OPC Belt message stays on after replacing belt


As far as the OPC belt - don't replace it until you start seeing ghosts and image defects! Reset it by:

Press 1 and 7 at the same time
Press 1 to reset the life counter.

Dec 06, 2007 | Brother MFC-9420CN All-In-One Laser...

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