EEROM

EEROM is used as nonvolatile storage for calibration and configuration data￿ Useful information from the EEROM is printed on the service configuration plot￿ The EEROM is soldered to the Main PCA in both new and rebuilt electronic modules￿

If you clear the EEROM or replace the electronics module￿ perform all calibrations￿ Also note that the factory spittoon value on the cleared or new EEROM is 0%￿ Keep in mind that the value printed on the service configuration plot may greatly underestimate the amount of ink in the spittoon￿

Input/Output Interfaces

The Printers have both a parallel ￿Bi<Tronics￿ and a serial ￿RS<232<C￿ interface￿ Unlike the DesignJet 650C￿ they have no modular input/output ￿MIO￿￿ You can connect the Printers to a network by means of an HP JetD￿rect EX or HP JetD￿rect EX P￿us3 external print server￿

Bi*Tronics

In addition to the operating modes of the DesignJet 220￿ the Bi<Tronics interfaces feature the extended<capability<port ￿ECP￿ forward and reverse operating modes￿ providing for faster communication￿

RS*232*C

The supported baudrates are 1200￿ 2400￿ 4800￿ 9600￿ 19200 and 38400￿ with eight bits and no parity￿ or seven bits with either odd or even parity￿ Mark parity is not supported￿ Both XON/XOFF and DTR handshaking are supported￿ ENQ/ACK handshake is not supported￿

Power Supply

An auto<ranging power supply is located in the electronics module￿

The primary side of the power supply contains rectified line W ￿ R N I N G voltage that can be lethal when touched even if the ON/OFF

switch is OFF.

In any case, you should not need to open the electronics module. It is one exchangeable part.

Water Condensation

In humid environments￿ water may condense on the side<plates￿ A wick attached to the underside of the right side<plate routes water drops away from the main<PCA electronics￿

10-8

HP DesignJet 430, 450C and 455CA Printers

Functional Overview