The imagesetter contains a microcontroller - PCB, one or two  LED - PCB's and a 2x24 digits LC - display. I changed the original design from 1 100mmx160mm LED - PCB into two, which are a bit bigger then 100x80, to get a better lightning result on the edges or to develop two sided PCB's.

The core is an Attiny 2313, which works as a clock. The time is set and saved with the 3 pushbuttons (K3-K5). On the microcontroller PCB are also the connector for the LCD and an 10 pin ISP connector.

The LED PCB contains 8 constant current sources, witch each 8 UV - LED's. This panel can also be used without the microcontroller, for that, the jumper1 (JP1) needs to be set to 2-3.

When you rebuild this circuit, PLEASE TAKE CARE OF YOUR EYES !