WARNING
WHEN POWER SUPPLY
IS
REMOVED FROM COMPUTER, YOU
ARE
EXPOSED TO LETHAL VOLTAGE FROM POWER SUPPLY
CAPACITORS.
DISCHARGE POWER SUPPLY CAPACITORS
ACCORDING TO THE FOLLOWING
STEPS.
IF THE POWER SUP-
PLY
DISCHARGE TOOL
IS
NOT AVAILABLE, WAIT AT LEAST 15
MINUTES AFTER REMOVING POWER FROM COMPUTER AND
CONTINUE WITH
STEP
8.
Assembly
Access
4-7
4.
Familiarize yourself with the power supply discharge tool, HP PN 09855-67004,
if
you have
not previously used
it.
The discharge tool consists of a meter and a switch-operated dischar-
ger. The meter indicates the approximate voltage across the energy storage capacitors
in
the
power supply.
WARNING
WHEN PERFORMING THE NEXT
STEP,
ENSURE THAT NO MET-
AL
OBJECTS
ARE
IN YOUR HAND
OR
ON THE POWER SUPPLY.
THE
DISCHARGE
TOOL
PINS
WILL
HAVE
HIGH
VOLTAGE
ACROSS THEM.
5.
Carefully insert discharge tool pins directly into SAFETY DISCHARGE holes on top of
power supply until tool rests on power supply
lid.
Little force
is
required
if
tool
is
straight
when inserted. The meter gives an approximate indication of voltage across capacitors.
WARNING
ALTHOUGH THE DISCHARGE TOOL SWITCH CAN
BE
MOVED
IN EITHER DIRECTION, THE
TOOL DISCHARGES THE SUPPLY
ONLY
WHEN THE SWITCH
IS
PUSHED DOWN.
CAUTION
DO NOT
USE
DISCHARGE TOOL
FOR
MORE THAN TWO DIS-
CHARGES IMMEDIATELY FOLLOWING
ONE ANOTHER.
6.
Push discharge tool switch down and hold down to discharge capacitors. Discharging takes a
few
seconds. Observe meter movement as switch
is
held down until capacitors are complete-
ly
discharged.
7.
Carefully remove discharge tool by pulling straight out of power supply.
8.
Disconnect power supply cable from power supply.
9.
Disconnect safety ground cable from
lug
on chassis.
10. Loosen four
#2
Pozidriv captive screws that attach power supply to chassis.
11.
Pull power supply straight out of chassis.
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