Printronix L1024 - Manual (Page 112)

B–8 Host I/O Interfaces
Termination Resistors
For parallel interface configurations, the printer is equipped with 470/1K ohm
pullup/pulldown terminating resistors located on the printer motherboard.
Generally, these terminating resistors are suitable for most applications. If,
however, the standard terminating resistor pack is not compatible with the
particular interface driver requirements of your host computer, other values or
combinations of pullup/pulldown resistors may be necessary.
If you are experiencing communication problems between the printer and host;
such as double characters, incorrect characters, or loss of data, the cause may be
the value of the termination resistors on the motherboard. Contact your
authorized service representative for instructions on replacing the termination
resistors.
Table B–3. Dataproducts Parallel Interface Termination Resistors
Part Number Description Main Controller Location
101381–331 330
Ω
Pull Up Resistor RP1
101381–002 220
Ω
Pull Down Resistor RP2