BIAONU UV LED Board for ELEGOO Saturn 4K

The light array of the original Saturn isn't a single COB module like on later machines — it's eighteen discrete LEDs on one board. That shapes its failure mode: one diode in the string dies and prints develop a permanently undercured patch, always in the same spot of the build area. BIAONU assembles this board; ELEGOO sells no original equivalent.

Specifications

• 18 discrete UV LEDs at 405 nm
• Rectangular board sized for the 8.9" 4K panel
• LED positions silkscreened on the PCB (D01–D18)
• Long power leads that reach the driver board without splicing

Compatibility: ELEGOO Saturn 4K — the first Saturn, with its 8.9" 4K panel. Don't confuse it with the Saturn 4 (10" 12K) or the Saturn S (9.1" 4K); their light arrays are a different size and this board won't fit. It's the cheapest light board in the family, so replacing the whole thing usually beats reflowing a single burnt LED.