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SATO M-5900RV Operator and Technical Reference ManualPage 6-2
Section 6. Troubleshooting
PN 9001081
Rev. C
1. Is the IBM parallel printer cable connected securely to your parallel port (DB-25S
Female) on the PC and the Centronics 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 there more than one parallel interface port on your PC (LPT1, LPT2, etc.)? If
so, make sure you are sending data out the correct port.
3. When you send the print job to the printer and it does not respond, do you get an
error message on your PC that says "Device Fault" or something similar?
This may mean that the computer doesn't know the printer is there. Verify that:
a. Both ends of the cable are securely inserted into their respective connectors.
b. The printer is On-Line
c. The cable is not defective. There are other things that can cause this error
message on your computer but at this stage a defective cable may be one of
the reasons.
4. When you send the print job to the printer and it does not respond and there is
no error message on your computer.
a. Check your data stream for some of the basics. Is your job framed as follows?
<ESC><DATA><ESC>Z
b. Verify that you've included all required parameters in the data stream.
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 your data stream
is consistent with these.
5. If you've checked all of 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 (page 2-38).
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.
6.3 Using the Centronics (Parallel) Interface