Service Manual
Page 69
... feet from the computer, use LaserJet Explorer, the Windows Printing System, and other software applications and drivers. Serial Protocol When printing with older computers. Advanced Functions The Advanced Functions feature of the printer enables bi-directional communications between 51...printer I/O setting on both the printer and the computer. If it is set to change the settings on the printer control panel for the High Speed Parallel I/O is set to use an RS-422A serial configuration (not available on the computer is YES. Protocol on the LaserJet 4 Plus or 5). Printer...
... feet from the computer, use LaserJet Explorer, the Windows Printing System, and other software applications and drivers. Serial Protocol When printing with older computers. Advanced Functions The Advanced Functions feature of the printer enables bi-directional communications between 51...printer I/O setting on both the printer and the computer. If it is set to change the settings on the printer control panel for the High Speed Parallel I/O is set to use an RS-422A serial configuration (not available on the computer is YES. Protocol on the LaserJet 4 Plus or 5). Printer...