HP 3000 III Series Manual page 365

HP 32435A Series III Power Supplies
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CAUTION
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Never attempt any current 1 imi t adj ustments in the
field. These limits are correctly set at the fac-
tory prior to the system's shipment and must never
be changed. Failure to observe this caution may
result in serious damage to the computer system.
The power supply output voltages should be checked from the Power
Supply Control and Display Assembly DC VOLTAGES test points after
the system is installed and during each scheduled preventive
maintenance interval. If any measured voltage is not within the
limits spe'cified in table 10-1, adjust the associated power sup-
ply to bring its output voltage within the specified limits. It
should be noted that the +15- and -IS-volt outputs of the HP
633l2F-P02 power supply are controlled by the same adjustment.
If either voltage is adjusted, then the other voltage must be
checked and possibly readjusted.
During any power supply adjustment, perform the adjustment slowly
to avoid an overvoltage condition that will shutdown the system.
If an overvoltage condition does occur, rotate the voltage ad-
justment counterclockwise a small amount, reset the system, and
slowly rotate the adjustment clockwise until the output voltage
is within its specified limits.
10-4. REPAIR AND REPlACEMENT
The HP 32435A Series III Computer System power supplies are non-
repairable units and, if found defective, must be replaced. Ex-
cept for replacing open fuses, no repair procedures are required.
All the power supplies are removed from the front of the equip-
ment bay(s) after first removing and labeling all wires attached
to the rear of the supplies.
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CAUTION
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Replacement power supplies may be shipped with a
strap on the terminal board for l20V operation.
This strap must be removed for 220V operation or
the power supply will be damaged when power is
first applied to the computer system.
Early models of the HP 32435A Series III Computer System contain
one or two HP 6260.5M-P31 power supplies; later models contain the
HP 62605M-P41 power supply. In countr ies where VDE Certification
is required, the HP 6260SM-P3l can only be replaced by another HP
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