PN 9001024
Rev. B Jan. 2000
Page 8-3
SATO CL608 & CL612 SERVICE MANUAL
SECTION 8 – Troubleshooting
8-3 Troubleshooting the Centronics (Parallel) Interface (Cont)
c. Verify the following:
You have not typed a "0" (zero) for an "o" (letter) or vice-versa.
You have not missed any <ESC> characters where they're needed.
Make sure all printer command codes are capital letters.
Your protocol codes are set for Standard or Non-Standard and data stream is
consistent with these.
5. If you've checked all the above and the printer still isn't printing, you may want to try
a Receive Buffer Hex Dump to determine what (if anything) the printer is receiving
from your computer. See Hex Dump Diagnostic Labels.
The Centronics port is now listening for incoming data. Send your print job. The
printer will now print (only once) a Hexadecimal (Hex) Dump of everything it
received from the host computer. Each 2 digit hexadecimal character represents a
character the printer received. It may be tedious, but now you can analyze and
troubleshoot the data stream.
WARNING: A small label may produce a large amount of data when
printed in Hex Dump.
6. While checking the Hex Dump printout, look for 0D 0A (Zero D Zero A) (Carriage
Return and Line Feed) characters 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 you are using BASIC, it may be
adding these characters automatically as the line wraps. Adding a "width" statement
to your program can help to suppress these extra 0D 0A characters by expanding the
line length up to 255 characters.
If you're not programming in BASIC, check to see if you have an equivalent statement
in the language you're using to suppress extra carriage returns and line feeds from
your data being sent out to the printer. We want the data stream to be one complete
line going to the printer.
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