Phillips screwdriver
A screwdriver with a cross-shaped (+) point
positioning holes
Holes in a circuit board for stabilization on a surface before attaching screws. The holes t onto
specic positioning pins on the attachment surface.
positioning pins
Pins on a surface for stabilizing a circuit board before attaching screws. The pins align with specic
positioning holes on the circuit board.
power supply cage
An enclosure for hot-swappable power supply units
power supply unit
A component that converts alternating high voltage current (AC) into direct current (DC) for an
electrical device
riser card
A small circuit board that serves as an extension to the system board for installing expansion cards
and modules
self-tapping screw
A screw that can create its own threads as it is driven into the material. QNAP sometimes uses
self-tapping screws for certain components such as fans.
system board
The main circuit board in a device where important system modules (such as the CPU) are located
| NAS Repair Manual
Glossary 174
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