Neptune 4 TL4970 and Neptune 4 Pro TL4972 - how to update firmware – Jaycar Electronics

This guide details firmware updates for Elegoo Neptune 4 TL4970 and Neptune 4 Pro TL4972 printers, which come with either Ribbon-cable or Type-C hardware, requiring different firmware.

You would not normally need to update the firmware, unless directed to by support staff, or if your printer does not start after an update.

The easy way to update your firmware

Elegoo have made it possible for you to update recent firmwares via the over-the-air updates.

Please visit this page on how to do this: https://wiki.elegoo.com/neptune/neptune-4-pro/type-c-version-how-to-update-frimware

Neptune printers with older firmware can also be updated via USB sticks.

If you have a Type-C printer which is not able to work with the above instructions, read on below.

Which printer version do I have?

The Neptune 4 TL4970 and Neptune 4 Pro TL4972 printers have two hardware versions identifiable by different print head cable types. The firmware update process and files are different for each version, so using a wrong firmware may stop the printer from working. Identify your printer below.

Ribbon-cable version - Serial number will be like NEP 4 .xxxxx.xxxx / NEP 4 Pro .xxxxx.xxx:

Type-C version - Serial number will be like NEP 4+.xxxxx.xxx / NEP 4 PRO+.xxxxx.xxx:

How to recover Type-C Neptunes by flashing the EMMC board

You will need to do this process if your Type-C printer can not get to the About Machine screen to upload a firmware as described above, or it fails to upload the firmware from the USB stick or OTA.

The O/S for Type-C Neptune 4 & 4 Pro is here - you'll need a PC & a Makerbase USB EMMC adapter.

Download the file from the link above
Extract the IMG file to a new folder on your PC
Unplug the printer power cable & remove the bottom panel from under it (Philips screws)
Disconnect the fan cable plug from the motherboard (note which socket it was in)
Remove the two Philips screws from the EMMC board
Gently pull the board upwards at the screw holes to remove it
Plug the board into the EMMC adapter as shown below
Plug the adapter into the PC's USB port
Download the Raspberry Pi Imager here
Install the RPi Imager and open it
Click OS, then Use custom
Navigate to the IMG file you extracted earlier, and open it
Select Storage, choose the EMMC, and press Next
Press Write
Press I Understand, Erase and write
Wait for the write to complete, then wait for it to verify
Unplug the EMMC adapter from the PC and remove the board
Reinstall the EMMC board into the printer and screw it down
Plug the motherboard fan cable in, and reinstall the cover
Connect the the printer power cable and turn it on
Open Settings, About Machine & check the model name (Neptune 4 or 4 Pro)
If the printer shows the correct model, you can do Factory Reset, Z-offset and level it

If the printer model name is wrong after the EMMC flash

Use a USB stick & matching model firmware from here:

https://wiki.elegoo.com/neptune/neptune-4-pro/type-c-version-how-to-update-frimware