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.
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
D
110 Vac
Power Cords
0
[jj
110V
[j]
d
110V
220
Vac
220V
220V
110
Vac
220
Vac
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.
[JJ
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
I
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