Resistors, Terminating, V6 Controller Board - Printronix P7000 Series Maintenance Manual

Chapter 5
Replacement Procedures

Resistors, Terminating, V6 Controller Board

For parallel interface configurations, the printer is equipped with 470 Ohm and
and 1K Ohm terminating resistors on the controller board. These are suitable
for most applications. (See Figure 38, page 315.)
If the standard terminating resistor pack is not compatible with the particular
interface driver requirements of the host computer, other RP1 and RP2 values
may be required. 220 Ohm and 330 Ohm alternate terminating resistors are
provided with the printer. If you install the 220 Ohm resistor, you must also
install the 330 Ohm resistor. Possible terminating resistor combinations are
shown below.
Factory Default
Removal
CAUTION
To prevent electrostatic damage to electronic components, always wear
a properly grounded static wrist strap when you handle circuit boards.
1. Prepare the printer for maintenance (page 230).
2. Cabinet Models: Remove the paper path (page 303).
Pedestal Models: Remove the top cover assembly (page 281).
3. Locate the terminating resistor packs. (See Figure 37, page 313.)
4. Using a chip puller, remove the resistor packs.
Installation
CAUTION
To prevent electrostatic damage to electronic components, always wear
a properly grounded static wrist strap when you handle circuit boards.
1. Using a chip installation tool, install the resistor packs in the correct
socket. (See Figure 37, page 313.)
2. Cabinet Models: Install the paper path (page 303).
Pedestal Models: Install the top cover assembly (page 281).
3. Return the printer to normal operation (page 231).
314
Configuration
Alternate
RP1
470 Ohm
220 Ohm
RP2
1K Ohm
330 Ohm