Terminating Resistor ConfigurationsThe factory equips the printer with several resistors that are used for parallelinterface configurations and are suitable for most applications. These 470 ohmpull-up and 1K ohm pull-down terminating resistors are located at RP1 and RP2,shown in Figure 13.If the values of these terminating resistors are not compatible with the particularinterface driver requirements of your host computer, you may need to installresistors with different pull-up and pull-down values.Note: Must be installed by an IBM service representative.The shipping kit for this printer includes 220 ohm pull-up and 330 ohm pull-downalternate terminating resistors. If you install the 220 ohm pull-up resistor, you mustalso install the 330 ohm pull-down resistor. Table 9 lists the three terminatingresistor configurations you can install:Table 9. Terminating Resistor ConfigurationsConfiguration Pull-Up (RP1) Pull-Down (RP2)Factory Default 470 ohm 1K ohmAlternate 1 220 ohm 330 ohmAlternate 2 1K ohm noneRP1 Default: 470 ohmAlt 1: 220 ohmAlt 2: 1K ohmRP2 Default: 1K ohmAlt 1: 330 ohmAlt 2: noneC2qu0112Figure 13. Resistor Locations218 Infoprint 6500 User’s Manual
