InfoPrint 6500 DBCS, User Manual

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Chapter 5
IEEE 1284 Parallel Interface
Terminating Resistor Configurations
The factory equips the printer with several resistors that are used for parallel
interface configurations and are suitable for most applications. These 470
ohm pull-up and 1K ohm pull-down terminating resistors are located at RP1
and RP2, shown in Figure 9.
If the values of these terminating resistors are not compatible with the
particular interface driver requirements of your host computer, you may need
to install resistors with different pull-up and pull-down values.
NOTE: Must be installed by an InfoPrint service representative.
Figure 9. Resistor Locations
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. Table 7 lists the
three terminating resistor configurations you can install:
183479b
Default: 470 Ohm
Alt 1: 220 Ohm
Alt 2: 1K Ohm
Default: 1K Ohm
Alt 1: 330 Ohm
Alt 2: None
RP1
RP2