HP QMS 1660 - Manual (Page 172)

Intellifont
Proms
QMS 1660 Print System Reference 6-34
n
The numbers of the Intellifont PROMs (MR40, MR41, MR42,
and MR43) correspond to the socket numbers printed on the
controller board.
n Both the PROMs and their sockets are notched on one cor-
ner to identify correct orientation: notch to notch.
n If you meet resistance when inserting a PROM in its socket,
recheck the orientation of the PROM.
▲ Caution : Do not force the PROMs into the sockets.
5 Check your PROM installation.
Make that each PROM is in the correct socket and that the
notched ends of the PROMs match the notched ends of the sock-
ets.
6 Replace the printer and controller board covers.
Use the instructions in the “Replacing the Printer and Controller
Board Covers” section of this chapter.
Increasing the Disk Cache Size
If your printer has more than 12 MB of RAM, the size of the disk
cache is adequate.
Socket PROM