HP Model 748 HP Model 748 Service Handbook - Page 50

Introduction, Tools Required, Safety Precautions

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Field Replaceable Units Introduction Introduction This chapter contains the procedures to replace assemblies in the VMEbus Board Computer and the Model 748i chassis components (such as the VME module, EISA/PCI module, Mass Storage module, Power supplies and chassis mounted hardware). CAUTION: Removal of the VMEbus cage requires the removal of the EISA/ PCI module first! The EISA/PCI converter to VME backplane connector extends below VME cage, removal of the VME cage prior to removal of the EISA/PCI module will result in damage to the connector. Tools Required All field replaceable parts can be accessed with these tools: Grounding wrist strap. No. 1 Pozidriv screwdriver. Small flat-tipped screwdriver. 3mm (0.125-in.) thin-wall nutdriver, maximum outer diameter of 5.7mm (0.225-in.). Safety Precautions As with any electrical/electronic product, certain safety precautions must be practiced. These safety precautions, when followed, can protect you from injury, and the equipment from possible permanent damage. CAUTION: Integrated circuit components in these products can be damaged by electro-static discharge. It doesn't make any difference whether the ICs 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. Integrated circuits can be protected by using a static free work place and wearing clothes that do not hold static charges before handling any of the workstation's PC boards. When you need to remove or install a part or assembly, remove power from the product first. At the static free work place, touch sheet metal with your fingers before touching a printed circuit 5-2

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Field Replaceable Units
Introduction
5-2
Introduction
This chapter contains the procedures to replace assemblies in the VMEbus Board Com-
puter and the Model 748i chassis components (such as the VME module, EISA/PCI mod-
ule, Mass Storage module, Power supplies and chassis mounted hardware).
CAUTION:
Removal of the VMEbus cage requires the removal of the EISA/
PCI module first! The EISA/PCI converter to VME backplane
connector extends below VME cage, removal of the VME cage
prior to removal of the EISA/PCI module will result in damage to
the connector.
Tools Required
All field replaceable parts can be accessed with these tools:
Grounding wrist strap.
No. 1 Pozidriv screwdriver.
Small flat-tipped screwdriver.
3mm (0.125-in.) thin-wall nutdriver, maximum outer diameter of 5.7mm (0.225-in.).
Safety Precautions
As with any electrical/electronic product, certain safety precautions must be practiced.
These safety precautions,
when followed
, can protect you from injury, and the equipment
from possible permanent damage.
CAUTION:
Integrated circuit components in these products can be damaged by
electro-static discharge. It doesn’t make any difference whether the
ICs 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.
Integrated circuits can be protected by using a static free work place
and wearing clothes that do not hold static charges before handling
any of the workstation’s PC boards.
When you need to remove or install a part or assembly, remove
power from the product first. At the static free work place, touch
sheet metal with your fingers before touching a printed circuit