SATO M84PRO Service Manual page 64

Section 6: Troubleshooting
• Ensure the data stream is correct, all letters of command codes are in upper case, and with-
out spaces.
• Ensure protocol codes are set for standard or non-standard and that they are consistent with
the data stream.
• Ensure the printer is receiving from the computer using a Receive Buffer Hex Dump. Refer to
that procedure for instructions. The printer will print (only once) a hexadecimal dump of
everything it has received from the host computer. Each hexadecimal character represents a
character the printer received. Analyze and troubleshoot the data stream.
NOTE: A small label may produce a large amount of data when printed in
Hex Dump.
While checking the hex dump printout, look for OD
acters throughout. The command string should be continuous. CR or LF characters are not
allowed between the start command (<ESC>A) and the stop command (<ESC>Z). If Basic is
being used, it may be adding these characters automatically as the line wraps. Adding a
width statement to your program can help suppress these extra OD
expanding the line length up to 255 characters.
If not programming in BASIC, check to see if the equivalent statement in language exists to
suppress extra carriage returns and line feeds from data being sent to the printer. The data
stream must be one complete line going to the printer.
LAN E I
THERNET NTERFACE
• If the printer does not come up ready: Ensure the printer is powered on, all cables are con-
nected, and the printer is on-line. If possible, connect a terminal to the serial port and observe
for a boot prompt indicating the print server firmware has not been loaded properly. If reload-
ing does not correct the problem, try pressing switch 1 for more than 10 seconds. If the prob-
lem persists, the product may be defective.
• If the printer comes up ready but will not print: There is a problem with the interface
between the server and the printer, network connection or cabling, or a queue setup flaw. The
queue setup flaw could be the result of a faulty print server setup or other protocol-related
scenarios. Systematically perform checks and tests to isolate the cause.
The interface between the printer and server may be checked by waiting approximately two
minutes after the printer is powered on and then run a self-test label. If a self-test label does
not print, there could be a hardware problem. Double check the cable connections. In some
rare cases, disabling NBUF with the command SET PORT P1 NBUF DISABLED will solve
the problem.
If connecting to a 10baseT network, verify that the OK LED is illuminated. If the appropriate
LED's are not on, there is a possibility of a defective cable or connector. Try connecting a
different cable, port, or device to observe the results.
If using a repeater or hub, ensure that SQE is turned off at the hub (this is the default setting
for most hubs). Also, test the hub or repeater by trying the print server on a different port.
M84Pro Service Manual
OA (carriage return and line feed) char-
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OA characters by
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