Bematech KC-4112 Rev.1.0 - Manual (Page 24)

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Possible Cause
The serial cable has one or more lines with faulty
connections / broken wires
The pin layout does not meet the specification
The baud rate is incorrectly set
Possible Solution
Check for a good connection between the printer and
the host or change the serial cable
Check if the pin layout used complies with the protocol
being used for data transmisson. Remenber that the
printer uses the DTR/DSR protocol. For more information
on serial pin layout, see Chapter - 4
If the baud rate set on the printer is different from the
baud rate of the host, the printer will print random
characters or not print at all. Check carefully the host’s
serial baud rate configuration as well as the printer’s
Dipswitch settings
Parallel communication is faulty
Serial communication is faulty
Possible Cause
The parallel cable has one or more lines with faulty
connections / broken wires
The pin layout does not follow the Centronics standard
The parallel interface is not set to normal
(unidirectional) at the host side (PC)
Command or parameters incorrect(s)
Paper near end cable is not correctly connected to the
paper
Possible Solution
Check for a good connection between the printer and
the host or change the parallel cable
Check the correct pin layout in this manual
Check in your computer bios if parallel port is set to
NORMAL (SPP and EPP are not supported)
Turn on the printer in Dump mode to see exactly what
data is being sent to the printer
Connect the paper near end cable correctly
Command or parameters incorrect(s)
Turn on the printer in Dump mode to see exactly what
data is being sent to the printer