Table of Contents
Advertisement
4. RS-232C Cable Connection
4.1 Preparing an RS-232C Cable
After obtaining an RS-232C cable, check that it is wired correct-
ly, referring to the table in
page
C-2. If you have an IBM communication adapter cable type
1502067, you will have to resolder the wiring at the printer end
of the cable. The procedure is as follows.
1
Remove the plastic cover from the printer end of the
cable.
2
Next to each of the wires inside the cable is a bare
shield wire. Solder all these shield wires together into a
single bundle.
3
Using a section of flat wire about 3 mm wide and 15
mm long, connect the bundle of shield wires to the met-
al facing of the connector. Check that the solder con-
nections are secure.
4
Desolder wires 2 and 3, then resolder them in crossed
configuration. Solder wire 2 to pin 3 and wire 3 to pin 2.
Cover the solder joints with thermofit tube.
5
Cut wires 4, 5, 6, and 20.
6
Solder wires 5 and 6 together and connect them to pin
20. Cover the solder joints with thermofit tube. Leave
wire 4 unconnected.
7
Tape all remaining loose ends, or seal them with ther-
mofit tube.
8
Attach the plastic cover back on.
4.2 Connecting the RS-232C Cable
Check that the power of both the printer and the computer is
switched off.
1
Discharge yourself of static electricity by touching a
metal object such as a doorknob.
2
Plug the printer end of the RS-232C interface cable
into the printer's RS-232C connector and attach it in
place.
3
Plug the other end of the cable into the computer's RS-
232C interface connector.
4
Turn on the printer.
RS-232C Signal Pin Assignment on
Appendix C Host Computer Interface
5
The printer RS-232C parameters are factory-set to the
following values:
Baud rate=9600 bps, data bits (character length)=8
bits, stop bits=1, parity=none
The two RS-232C protocols are XON/XOFF and DTR.
The printer performs both of them simultaneously,
using positive logic for DTR.
If you are uncertain as to the printer's current
parameter settings, you can reset them to the values
listed above by following the procedure explained in
Printer Resetting on page
6
Set the computer to the same parameters as the printer.
On many computers this can be done by setting DIP
switches before the power is turned on. Another method
is as follows:
4.3 Setting the RS-232C Parameters
Q Q Q Q Windows 95/98/ME
1
Click on Start button in the Windows 95/98/ME task
bar and align the cursor with Settings, then click on
Control Panel from among the items displayed.
2
The control panel folder opens. Double click on
System.
3
System Properties opens. Click on the Device
Manager tab, then click on the COM port to be used.
4
Click on Properties button.
3-49.
C-4
Advertisement
Chapters
Table of Contents
