TrustedReviews has posted a review of the Epson EPL-6200 Laser Printer

There are three indicator lights in a line on the right shoulder of the printer and as well as the usual toner and paper jam indicators the third light indicates memory errors. We would expect this indicator to be needed if you use the printer with its built-in level 3 PostScript interpreter on more complex documents and at higher resolutions, because the machine only has 8MB of internal memory as standard. The EPL-6200 can print at a full 1,200dpi, though by default it outputs at 600dpi.

Epson EPL-6200 Laser Printer