This printer had a motherboard change mid way in 2016, so there are at least TWO different motherboards. Click here to see some photos of these motherboards. Of the two versions that are known to exist, I am referring to the older one as “motherboard A”, and the newer one as “motherboard B”.

Please click the photo below that matches your motherboard to download the correct firmware for your Z-603S. '

Each link contains both the OEM factory firmware, and the custom community firmware for these printers.

To browse the JGAurora Z-603S firmware directory, click here.

17th Feb 2018

• Initial public release, based on latest 1.1.X (1.1.8) build.
• EEPROM off
• Bed levelling probe support disabled.