本体の分解方法を教えてください

⟐ Answer accepted 6月 21, 2026 at 19:39 GMT-7

⟐ Answered 7月 04, 2026 at 0:14 GMT-7

"preparing to print CD/DVD" then

"close the output tray all the way inside before inserting CD/DVD tray"

Have checked for updates all up to date.

⟐ Commented 7月 03, 2026 at 8:19 GMT-7

⟐ Answered 7月 03, 2026 at 3:35 GMT-7

⟐ Commented 7月 03, 2026 at 0:12 GMT-7

1、The paper size settings match on both the computer and the printer.

2、This issue happens randomly—sometimes on the very first page, and sometimes in the middle of a print job.

3、I have already replaced the pick-up roller, but the error persists. It still randomly prints blank pages and reports a paper size mismatch.

Now I heavily suspect it is an issue with the PE sensor (registration sensor) or its return spring. Any advice on how to clean or replace the sensor spring for Epson ET-3750?

I have now looked up this error and found many fixes.

Here is what I have tried so far.

1) Removed power cable while printer on, waited 60 sec, held power button for 30 secs, plugged power cable back in

Outcome: Ran printer, same issue.

2) Removed the side cover, unplugged the two ribbon cables nas the reseated the, the smaller one with the blue tab facing down, and the larger one with the blue tab facing up.

Outcome: Ran printer, same issue

3) Removed the scanner completely, opened the scanner and checked all cables. Moved the carriage over to the middle, gave everything a clean, and put it all back together.

Outcome: Ran printer; scanner carriage moved to the start position, then the error code appeared again.

Now, one of the suggested fixes for these issues is a firmware update; however, the error screen will not let me do anything. I can't reset the printer, which was another suggestion. I have no ink in the printer, which was another suggestion for the error code, but I still have no way to bypass the error screen.

So, please, if anyone knows how or if I can bypass the error screen, I may be able to reset the printer. Or is this just a brick destined for land fill (recycle)

⟐ Answered 7月 01, 2026 at 5:47 GMT-7

⟐ Commented 7月 01, 2026 at 1:09 GMT-7

I've had the bad idea to upgrade the firmware of our Epson WF-7840 (version CD17M6 now).

Now, our non epson cartridges are not recognised anymore.

I've search the web about how to downgrade the firmware. I found the procedure, found how to put the printer in "recovery mode" and, on the Epson website, I found the "Recovery Mode Firmware version CB08LC" for the Epson WF-7840.

But it doesn't work...

First problem, the model of the printer does not appear in the "Epson firmware updater" but it sees that a printer is connected.

Second problem, and it is where it stops, when I launch the Update, it fails with a message on the printer's screen "Data file not found".

I tried with my mac (macbook pro 16" m1 max) and with an older macbook pro from 2009 with the same result. I tried with another USB cable and still no luck.

What am I doing wrong?

⟐ Answered 6月 29, 2026 at 7:10 GMT-7

⟐ Answered 6月 28, 2026 at 0:57 GMT-7

now all the lights are blinking, and I don't know what else to try.

Thinks I tried:

Take out power supply

using epson adjustment tried almost every test and all failed to fix it

⟐ Answered 6月 26, 2026 at 1:17 GMT-7

I have an Epson L3110 and for some weeks the color printing was getting weaker and weaker.

I followed youtube and cleaned the print head using isopropanol and warm distilled water. After cleaning, there was no blockage to water flowing through the printhead ... everything seemed great. After putting the printhead back in, I did nozzle cleaning 4x to make sure the printhead was loaded with color ... and the color printing was OK!

I turned the printed off for the night and the next day, printing in color resulted in nothing being printed, only black printing worked! I cleaned the head again, did 5x nozzle cleaning to fill the printhead with color, I made sure there is no air in the tubes and when printing in color .. nothing happenned, I still cannot print anything in color.

What am I doing wrong?

Best,

Daniel

⟐ Answer accepted 6月 24, 2026 at 10:45 GMT-7

⟐ Answered 6月 22, 2026 at 11:09 GMT-7

⟐ Commented 6月 09, 2026 at 5:11 GMT-7

⟐ Answer edited 6月 07, 2026 at 12:39 GMT-7

We have a small torsion spring which we don't know where it goes. I think I can find it, but man if someone had any guides, manuals, videos, etc. of a teardown and reassembly I could watch...

We don't have $500 to replace it but we definitely have need to use it soon.

I'm absolutely shocked at how thoroughly this nasty green chemical completely lined the entire inside of this printer.

⟐ Answered 6月 04, 2026 at 5:38 GMT-7

I removed the empty cartridges (cyan, magenta and yellow were low), shook all of the cartridges, pulled off the tape cover and installed the cyan, magenta and yellow cartridges.

The cyan ink cartridge was the only cartridge that could not be recognized at that time.

So, I reseated the cyan cartridge. I still got the message that it wasn’t recognized.

Then I reseated the cyan cartridge again. I still got the message that it wasn’t recognized.

So then, I power cycled the printer.

I turned the printer off, I unplugged the printer from the wall, and I unplugged the power cord from the printer for a complete power cycle for about 5 minutes.

I plugged the power cord into the printer, plugged the cord into the wall outlet and turned on the power button.

That did not solve the problem.

I went to the Epson Support Services site and other internet sites and saw tips for solving this problem.

I followed the instructions on the Epson site, which were the same steps that I had tried as I mentioned above, but this time, I used a soft cloth to clean the cyan connections on the cartridge and in the cartridge carriage and I checked each cartridge to make sure the gold colored chip was on the cartridges. They all have the gold colored chip.

It didn’t fix the problem.

Then I saw a tip that said that installing firmware would fix some problems with the printer.

So I entered my printer information and was returned a download of firmware for my printer.

The firmware installed successfully.

Now, the black ink cartridge that had been working is no longer being recognized along with the cyan ink cartridge.

It seems when you install a defective cartridge and then take it out, the cartridge carriage in the printer becomes “unture” and if that’s not the case, then the problem has to be with the firmware or maybe both.

Something in the printer seems to get set when you install and then remove a defective cartridge. Somehow there is no way for the printer to reset itself to accept another cartridge install.

How do you make the printer "un-remember" the removed cartridge?

So now what do I do? How can I fix this problem?

⟐ Commented 6月 01, 2026 at 15:09 GMT-7

Thank you for your help, but I think I fixed it. I have tanks, not cartridges on mine. I make sure they are always full. I changed the setting on printing speed. It was checked for high-speed printing and I unchecked it. So far, so good. I have 2 of these printers and the one that was throwing the error printed much faster than the one that is doing ok. Again, thank you so much for trying to help! I have fought this fight for several months now and have watched every Youtube video I could find!

Well, printed great for 1 day and started doing the same thing again... I give up!

The noise is coming from the printhead as it moves back and forth. Do you have any idea which part I need to check. I am thinking it is in the hardware, not software, but I have no idea what part to check. Thank you so much for all your help. The printer is brand new, less than 2 months old and since it is a dtf converted printer I purchased on Amazon, the support is not very good.

⟐ Answered 5月 30, 2026 at 0:33 GMT-7