Comtrol SCO OpenServer - Manual (Page 35)

Troubleshooting 35
SCO OpenServer
Solving Printer-related Problems
To identify and resolve printer-related problems, follow these steps:
1. Verify that the printer is powered up, connected to the correct port,
and on-line.
2. Verify that the printer is connected using the correct cable. See the
RocketPort Hardware Reference Card and your printer manual for
connector pinouts and cable specifications.
3. Move the printer to a standard serial port, and try it there. If it
works on a standard port but not on a RocketPort, the problem
may lie in the RocketPort board or port configuration.
4. Move the printer back to a RocketPort port.
5. Enter this command to send a file directly to the printer port:
cat /etc/termcap >/dev/ttyrXX
Where XX is the port to which the printer is attached.
a. If you get nothing, check to make sure the device driver is
loaded, the port is enabled, and that you are in fact connected
to the port you think you’re connected to. If all of this is true,
connect the printer to the COM1 or COM2 port and repeat this
step. If the printer still fails to print, the problem is in the
printer. If the printer does print, go back to the beginning of
this chapter and test the RocketPort.
b. If you get a partial file printout or garbled characters, go to the
sections on Flow Control, beginning below.
c. If the file is printed correctly, but you are unable to print from
an application, check the application setup.
d. If the file is printed correctly, but you are unable to print
through the UNIX spooler, go to the section on UNIX Spooler
Problems, later in this chapter.
Checking Flow Control Configuration
To check flow control setup, enter this command at the system
console:
stty -a XX
Where XX is the port to which the printer is attached.
The system should respond with something like this:
speed 38400 baud;
line = 0; intr = DEL; quit = ^\; erase = ^H; kill = ^U;
eof = ^D; eol = ^@; swtch = ^@