9845B/C Environmental, Installation, and Preventive Maintenance Requirements 2-11 Voltage 11i'!;U"~1CI ALWAYS DISCONNECT THE COMPUTER FROM Ai'fi AC POW- ER SOURCE BEFORE SETTING A VOLTAGE SELECTOR SWITCH. The 9845B voltage selector switch is located on the rear panel of the mainframe. The 9845C switches are located on the rear panels of the computer and CRT. To alter the setting of a switch, slide the switch so that the position of the slot corresponds to the correct voltage, as previously shown. I CAUTION CHECK THE SELECTOR SWITCH SETTING BEFORE AP- PLYING POWER.
DAMAGE TO THE COMPUTER WILL OCCUR IF A SELECTOR SWITCH IS SET TO 110 VOLTS AC AND 220 VOLTS AC IS APPLIED TO THE POWER INPUT CONNECTOR. Next, ensure that the voltage selector switch (three switches on the 9845C) is set for the nominal line voltage, as shown here. 98458/C Mainframe 9845C CRT Switch Switches 0 [jj 110V [j] d [JJ D 110V 110 Vac 220 Vac 220V 220V 110 Vac 220 Vac Power Cords If/"'iU"§1CI IF IT IS NECESSARY TO REPLACE A POWER CORD, THE RE- PLACEMENT CORD MUST HAVE THE SAME POLARITY AS THE ORIGINAL. OTHERWISE A SAFETY HAZARD FROM ELECTRIC- AL SHOCK TO PERSONNEL, WHICH COULD RESULT IN IN- JURY OR DEATH, MIGHT EXIST.
IN ADDITION, THE EQUIP- MENT COULD BE SEVERELY DAMAGED IF EVEN A RELATIVE- L Y MINOR INTERNAL FAILURE OCCURRED. The 9845B has one power cord, and the 9845C has two (one for the mainframe, one for the CRT). Power cords with different plugs are available for the 9845. The cords(s) packaged with each computer depends upon where that computer is to be delivered. Power cords supplied by HP have polarities matched to the power-input socket on the com- puter: • L ::: Line or Active Conductor (also called "live" or "hot") • N ::: Neutral or Identified Conductor • E ::: Earth or Safety Ground 09845-90039. rev. 4184