Problem with automatic switch
Posted on 1998-02-01
I've just bought an automatic switch, 2 input, 1 output to allow two different computers to use a Lexmark Optra R+ through the Parallel port.
Problem is, one computer prints correctly, it is a laptop, the other, desktop, prints a page with PJL stuff on, and then correctly prints the document. I have at one point managed to get the switch to work with the desktop machine, but the laptop wasn't plugged into it as it wasn't available.
I know it is the switch, as I have tried with a manual selector switch and both machines print correctly.
Anyone any suggestions? The switch is a cheap thing that I found in BYTE, a computer superstore in the UK. It has some jumpers, but there is no mention of what the do, it also has a power supply, but says that this is optional, and it does appear to work (almost) without it.
Both computers are set up for ECP printer ports, maybe that is the problem? It maybe that the Lexmark is trying to communicate back with the machine, I haven't a clue.
I would assume it is something simple to fix, or it is a fault with the switch.
Thanks for any help.