E004 error Canon 7301 Mfc

Synchronization signal from the main motor cannot be detected. Or the main motor speed is unstable after a set period of time.
You can consult the service manual in order to solve this error.

https://www.anyservicemanuals.com/downloads/brother-dcp-l8400cdn-dcp-l8450cdw-mfc-l8600cdw-mfc-l8650cdw-mfc-l8850cdw-mfc-l9550cdw-service-manual-and-parts-list-manual/

How to the Reset Purge Counter on a Brother Printer (With a Numerical Pad)
The 'Unable to Clean: Machine Error 46? message prevents you from printing on your Brother inkjet printer. It is especially frustrating when you realise there no reason why you can't carry on printing other than this message. Continue reading to find out what makes me say this and how you can rid yourself of this error.
This guide will deal specifically with Brother inkjet printers that have a number pad on the front of the printer. If you printer has a touchscreen as well as a numerical pad please see here. If however your printer does not have a number pad at all, the guide found here should be of use.

What is Error 46? 'Error 46: Unable to Clean' indicates that your Brother printer believes the ink absorber in the base of your printer is saturated with ink and any further printing could cause ink to overflow. How full this waste ink tank is has been estimated by monitoring how many pages your Brother printer has produced and how many manual/automatic cleans have performed. Sadly this is not a particularly accurate method of measuring how full an ink absorber is and the majority of the time your printer could prints hundreds of pages before there was any danger of any ink escaping. However getting the waste ink tank changed and resetting the counter can be an expensive procedure if you get a service centre to do it on your behalf. In many cases owners of Brother inkjet printers report the cost of the procedure outweighs the value of their printer.
With this in mind we suggest resetting the purge counter of your Brother printer using the method described below and continuing to use it until waste ink begins to overflow inside/outside the printer. This ensures you get the most out of your printer and can avoid replacing it until it becomes necessary to do so. I do however recommend you protect any surfaces around the printer should you decide to reset the purge counter to save any surfaces becoming stained with printer ink.
What printers will this reset work with? This reset procedure should be compatible with almost any Brother inkjet printer with a numerical keypad on the printer itself (and not touchscreen panel) and has been tested on every current compatible printer at our disposal. You can find a full list of compatible printers below:
Brother MFC-210C, MFC-215C, MFC-3240C, MFC-3340CN, MFC-3342C, MFC-410CN, MFC-420CN, MFC-425CN, MFC-5440CN, MFC-5840CN, MFC-620CN, MFC-640CN, MFC-640CW, MFC-820CW, MFC-235C, MFC-260C, MFC-240C, MFC-3360C, MFC-440CN, MFC-465CN, MFC-5460CN, MFC-5860CN, MFC-660CN, MFC-665CW, MFC-680CN, MFC-845CW, MFC-885CW, MFC-250C, MFC-255CW, MFC-295CN, MFC-297C, MFC-490CW, MFC-5490CN, MFC-5890CN, MFC-5895CW, MFC-6490CW, MFC-790CW, MFC-990CW, MFC-J615W, MFC-J220, MFC-J265W, MFC-J410, MFC-J415W, MFC-J430W, MFC-J5910DW, MFC-J625DW, MFC-J6510DW, MFC-J6710D, MFC-J6710DW, MFC-J6910DW, MFC-J825DW
If you have a printer with a numerical pad not covered above and find the purge counter reset works for you then please let us know so we can update our list.
Video Guide Purge Counter Reset Instructions Please note that some of the terms used below to describe buttons may change from one printer to another. For example:

• START may be down as MENU or SET on your printer or be a green button
• STOP may be referred to as EXIT or a red button

Before you begin the reset procedure your Brother inkjet printer needs to be in maintenance mode, but depending upon the model of your printer the method of doing this will vary. For most modern Brother printers please try the following:

1. With the printer turned on and ready to print remove the power cable from the printer (or turn the printer off if you have a fixed power cable).
2. Hold down MENU/SET/START and re-insert the power cable/turn it back on.
3. Keep the button held down until the screen reads MAINTENANCE.

If your screen does not now say MAINTENANCE it will need to be put into maintenance mode using one of the two methods below:

• Printers with a built-in Fax: Hold down MENU/SET/START and quickly press * 2 8 6 4.
• Printers WITHOUT a Fax: Hold down Menu/Set and the Black Start key before pressing the UP arrow four times.

Now your printer should say MAINTENANCE on the screen and you are ready to begin the process of actually resetting the purge counter.

1. Type in 80 using the numerical keypad.
2. Use the DOWN key to locate the purge counter. eg. PURGE0060025
3. Use the number pad to enter 2783 (this should zero the numbers after PURGE).
4. Press STOP/EXIT to return to the first stage of maintenance mode.
5. Press 9 and 9 to exit maintenance mode.

Your purge counter is now reset and you can now resume printing as normal. If however this has not cleared the error message I advise going through this guide again following the instructions to the letter. If the error persists please let us know.
I hope you have found this guide useful. If however you have anything to add or any further questions please don't hesitate to let us know in the comments.

E004 is a temperature related error. You would need to call in a service technician as it will require replacement parts.

Found this here...

(For MFC-7420)
When you turn off the MFC's power switch its memory will be cleared. To check
whether the MFC has faxes in its memory see Checking if the MFC has faxes in
its memory on page 11-5. If there are faxes you need to save them before following
the suggestions below (See Transferring faxes to your PC on page 11-5 or
Forwarding faxes to another fax machine on page 11-5).
Turn off the MFC's power switch and then turn it on again. If the error message
continues, leave the MFC for several minutes and try it again.
Check the settings in your application software to make sure it is set up to work
with your MFC.

(For MFC-7820N)
Turn off the MFC's power switch and then turn it on again. If the error message
continues leave the MFC for several minutes and then try it again. (The MFC can
be turned off for up to 4 days without losing faxes stored in the memory.)

Looking through this manual, this is the only solution that I could find. There are options on the 7820N model in the menus that will allow you to reset the printer itself, and i quick search through the above link for "printer reset" should bring you to the menu selections for that.

I assume you are talking about the canon 730i not 7301 but all the same www.precisionroller.com is a decent site for most printer supplies. Here is a direct link http://www.precisionroller.com/fuser-assemblies---units-for-canon-laser-class-730i/products.html

Open the scanner cover and remove any
foreign obstacles from inside the MFC. If the
error message continues, please follow the
steps below before disconnecting the MFC so
you will not lose any important messages.
Then, disconnect the MFC from the power
source for several minutes (which will erase all
faxes), and then reconnect it.
Check whether the MFC has faxes in the
memory
1. Press Menu/Set, 9, 0, 1.
2. If the MFC has no faxes, disconnect the MFC
from the power source for several minutes
and then reconnect it.
—OR—
If faxes are present, you can transfer them to
another fax machine. Go to Step 3.
—OR—
You can forward the faxes to your PC. Please
see Transfer faxes to your PC.
Transfer faxes to another fax machine
If you have not set up your Station ID, you
cannot enter fax transfer mode.
3. Enter the fax number to which faxes will be
forwarded.
4. Press Black Start.
5. After the faxes are transferred, disconnect
the MFC from the power source for several
minutes and then reconnect it.
You can transfer the Fax Journal report to
another fax machine by pressing Menu/Set,
9, 0, 2 in Step 1.
Transfer faxes to your PC
You can move the faxes from your MFC’s
memory to your PC.
1. Press Menu/Set, 2, 5, 1.
2. Using ▲ or ▼, select PC Fax Receive, and
then press Menu/Set.
The LCD will ask if you want to transfer a fax
to your PC.
3. To transfer all faxes to your PC, press 1.
—OR—
To keep all faxes in the MFC’s memory,
press 2.
4. After the faxes are transferred, disconnect
the MFC from the power source for several
minutes and then reconnect it.
(For details see Using Brother PC-FAX
software on page 5-1 in Software User’s
Guide on the CD-ROM.)

These steps is on user manual.

this printer has 6 Drum, check all, and look internal counters is available on the menu they are down counters. If Continues go the Brother Repair Center, for repair.

hello there here is some information that may help you solve this problem ok?
best regards michael

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E004 Fixing Unit Failure.
I would recomend calling repair Tech to resolve this issue....unless you know how to access service mode and perform a Printer Reset operation. Could be complete Fuser Unit failure.

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