Epson 1500 - Manual (Page 150)

The table below describes the chip sets you may install on your
printer’s controller board.
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On the ActionLaser 1500, one 0.5 MB chip set is initially installed, so you
can add only two more optional chip sets.
Installing memory chip sets
To install the memory chip sets on the controller board, you
need a cross-head screwdriver and a chip puller or a flat-head
screwdriver. If you have questions about installing chip sets,
contact your dealer for assistance.
5-36 Options