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HP 3242lA Series III Power Supplies
Table 9-2.
Hp 303llA Power Supply Controls and Indicators
,-------------
--------·~I---·_·-
-- ------
-----~.-------------.-.--
, Cbntrol or Indicator
I
Function
'-
--_
..
_---- -------------
'-----
-_
..
__
._._--_._._---.--------------
Power ON/OFF TOggle
Switch
BATTERY TEST Momentary
'Ibgg Ie Sw itch (moun t-
ed on rear of unit)
RESET Pushbutton
Switch
+5 LED Indicator
CROWBAR!BATT TEST LED
Indicator
BATTERY STATUS LED
Indicator
In the ON position, connects +20V from
the HP 303l0A Power Supply to the
HP
303llA to maintain the charge on the
battery and to develop required memory
vol tages •
In the OFF pos i tion, d is-
ab les the
HP
30 3llA.
Places power supply in a battery dis-
charge mode for test purposes. (Simu-
lates a powe r fa ilure cond it ion.)
Resets the battery discharge mode, re-
turning the power supply to normal op-
eration.
I
W
he n 1 it, i nd i ca te s t hat +5Vis b e ing
produced by the HP 303llA Power Supply
Used in conjunction with the BATTERY
STATUS indicator to determine if the
crowbar circuit has fired and shut
down the power supply.
I nd i ca te s the bat te r y co nd it ions as
follows:
a.
Remains continually lit for a
fUlly-charged ba t te ry.
b.
Flashes at a 2-Hz rate when the
battery is discharging.
c.
Flashes at a O.s-Hz rate when the
battery is charging.
d.
Remains off if battery is low or
not present.
9-20. HP 30311A SERVICING INFORMATION
Preventive maintenance,
adjustment,
and replacement
procedures
for the
power supply are contained
in
paragraphs 9-21
through
9-32.
No high voltage points
exist
within the
power
supply.
However, the supply is capable of supplying low voltage at moder-
ate current levels.
Use caution when manipulating metal tools or
probes near exposed conductors and terminals.
Extra care should
be exercised
~o
prevent the
possibility of shorting
the output
lines of the battery pack.
9-14
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