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Not every error is a printer error.
You will save time and money by clearing simple errors yourself.
The following hints might help you:
Symptom
Cause
Remedy
The printer seems to print, but there is
no blackening
At the start of printing, the LED goes
out shortly.
Wrong side of paper against the
print head
The power supply is not laid out
and/or connected optimally
Insert paper correctly
Use a sufficiently proportioned po-
wer supply and short lines. Check
all plug-in connections for transfer
resistances. Since high peak cur-
rents occur with thermal printers,
even the smallest transfer resistan-
ces result in excessive voltage
drops. In this case, no power supply
would be strong enough. Buffering
with capacitors is possible, if the
power supply is only slightly too
weak, and large capacitors (e.g.
4700±F) are used.
The printer only prints a few dots in
one line.
The paper feed works, but the self
test does not.
The printer only prints a few charac-
ters in one line. When I enter more, it
won't print at all.
The print-out is incomplete after a few
characters.
The printer buffer is "over-run" (256
bytes), so data is getting lost.
Solution: Check or start using
handshake. (software: XON/XOFF, or
hardware: CTS). If necessary, lower
output speed, e.g. down to1.200
baud. See manual MAN-D-400,
"Interface Settings".
The printer prints incorrect charac-
ters.
RS232 instead of TTL interface or
the other way around.
(characters of the upper area are
printed).
Wrong baud rate was selected. (a
lot of "?" are printed).
Use correct interface.
Set baud rate through solder
bridges or TINIT.
Bad ground connection on the prin-
ter. If the printer is not grounded
correctly, a part of the printing cur-
rent will flow through the interface,
causing a voltage rise and therefo-
re, a data falsification.
Host sends a break signal after
printjob (only "?" are printed).
Check and improve ground connec-
tion; supply power through short,
thick lines.
Turn off "framing error ". See manual
MAN-E-401, "Interface Settings".
Centronics printer works with a PC,
but not with my machine.
The described command does not
work.
Printer electrically not compatible
with host.
Parameter were e.g. set in ASCII
values instead of binary values.
Measure line levels. Contact GeBE
for adjustment.
Reset parameters.
GeBE E + F GmbH • www.oem-printer.com • GeBE Doc.No.:SMAN-E-413-V2.5 • Easy-Load Thermal Printer • GPT-4352
