Specifications

Operation Manual 5. Troubleshooting
DR300 55
5.2 Troubleshooting the RS232C (Serial) Interface
1. Is the RS232C Serial cable connected securely to your serial
port on the PC (DB-9S Male) and to the RS232C connector on
the printer?
Warning: Never connect or disconnect interface cables (or
use a switch box) with power applied to either the printer or
the host. This may cause damage to the interface circuitry and
is not covered by warranty.
2. Is the cable defective? At the very least, you should be using a
“Null Modem Cable,” which crosses pins in a specific manner.
This should enable your printer to print. We recommend that
you use a cable built to specifications described in Chapter 3,
Interface Specifications.
3. Check for obvious errors in the data stream. Remember that all
print jobs for serial data must be framed by an STX and ETX.
4. If after sending your job to the printer, it only “beeps” (or displays
a Framing Error message on the LCD panel), you may have a
configuration problem. There may be some inconsistencies with
the Baud Rate, Parity, Data Bits, or Stop Bits in relation to your
host computer. If you are confused as to what the printer’s cur-
rent RS232 settings are, you may choose the SATO defaults (all
DIP switches in the OFF position) to achieve 9600 baud, no par-
ity, 8 data-bits, and 1 stop bit).
5. If you still are unable to get printer output, try the Hex Dump. In
this case, the printer monitors its RS232C interface for incoming
data.