The extension to fix the 660AV serial printing problems (AV Serial Extension) is available online. It is the official tested solution and can be used for 660AV/serial connection problems, especially LaserWriter Select 310 printing problems.
- I have tested with this extension, and a document which consistently failed when printed to a LaserWriter Select 310 from the 660AV, now prints completely with no problem. I tested with:
Virtual Memory and Voice Recognition both OFF - Voice Recognition ON
Virtual Memory and Voice Recognition both ON In all three cases the 660AV printed with no problem from the Printer Port.
From the AV Serial Enhancement documentation:
The AV Serial Enhancement file is a system extension that should be installed in the System Folder of your startup disk.This extension enhances the functionality of your Macintosh Quadra 840AV, Macintosh Quadra 660AV, or Macintosh Centris 660AV. Specifically, the extension corrects certain reported problems.
These include :
(a) difficulties when printing with the LaserWriter Select 310 printer;
(b) a possible system error when both the serial port and an AppleTalk network connection are being used heavily; and
(c) a possible system crash when simultaneously receiving a fax and transferring files over a network.
These articles can help you locate the software update mentioned here: