Printronix ProLine 5 Series Manual page 189

The shipping kit for this printer includes 220 ohm pull-up and 330 ohm pull-down
alternate terminating resistors. If you install the 220 ohm pull-up resistor, you
must also install the 330 ohm pull-down resistor. The following table lists the
three terminating resistor configurations you can install:
Configuration
Factory Default
Alternate 1
Alternate 2
Removal and Installation
The procedure for removing and installing terminating resistors is provided in
your Maintenance Manual.
IMPORTANT This is an involved maintenance procedure; only a trained
technician should perform this procedure.
!
5–14
Pull-Up (RP1)
470 ohm
220 ohm
1K ohm
Pull-Down (RP2)
1K ohm
330 ohm
none
Interfaces