Safety Precautions; Electrical; Electro-Static Discharge - HP 340 Series Service Manual

Safety Precautions
As with any electrical/electronic product, certain safety precautions must be practiced. These
safety precautions, when followed protect both you and the equipment from injury and possible
permanent damage.
Electrical
WARNING
Always turn off the SPU and remove the power cord before removing
the case to remove or replace an assembly. If maintenance requires
power to be applied while the case is removed, proceed only with
extreme caution using safe, live-unit maintenance procedures. Do not
touch energized components in the SPU.
Heed and follow all "WARNING-HAZARDOUS VOLTAGE" labels.
Failure to follow these safety precautions may result in serious injury,
or worse.
Electro-Static Discharge
Integrated circuit components can be damaged by electro-static discharge. It doesn't make any
difference whether the IC's are installed on a printed circuit board or laying on a table. Static
charges can build up in people to a potential of several thousand volts by simply walking across
a room.
These circuits in the SPU and peripherals can be protected by using a static free workstation
and wearing clothes that do not hold static charges before handling any of the SPU's PC boards.
When you need to remove or install a part, turn off power to the SPU first. With the static free
workstation in place, touch sheet 111etal with your fingers before touching the printed circuit
assembly. If the assembly is not going to be re-installed, place the assembly in an anti-static
bag.
Following these precautions will extend the life of the computer products you maintain.
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Assembly Replacement