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(7) System ground
The optical disk drive should be grounded to the signal ground (SG) of the power
supply of the system. This SG line should be supplied with the system.
The Frame Ground is shorted in the optical disk drive by a metal strip attached to
the vibration isolation rubber between the frame (FG) and the base (SG).
3.3 Power Supply Requirements
(1) Allowable input voltage and current
The DC power supply input voltage measured at the power supply connector pin
of the optical disk drive (receiving end) must satisfy the requirements in Section
2.1.3.
(2) Current waveform (reference)
Figure 3.8 shows the +5 VDC waveform at seek.
C156-E224-01EN
When mounting the optical disk drive in the Device Bay 120mm (5
inch) of the PC chassis, there are two ways of choosing frames the
metal frame and the plastic (nonconductive material) frame.
When using a plastic frame, there is not a short circuit between FG
of PC and FG of the optical disk drive. As a result, the static
electricity tolerance decreases compared with metal frame.
It is recommended to use a metal frame to enhance the static
electricity prevention.
Figure 3.8 Current waveform (+5 VDC)
3.3 Power Supply Requirements
3-11
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