Fujitsu MCM3130SS Manual Do Utilizador

3-14 C156-E228-02EN 

 

The optical disk drive can be mounted in a 120 mm (5 inch) device 
bay of the PC chassis using either a metal frame or a plastic 
(nonconductive material) frame. 
If a plastic frame is used, the personal computer's FG and the optical 
disk drive's FG are not shorted.  Consequently, the static electricity 
tolerance is inferior to that realized when a metal frame is used. 
Fujitsu recommends using a metal frame.  In particular, a metal 
frame must be used especially when high static electricity tolerance 
is required. 

(1)  Allowable input voltage and current 

The DC power supply input voltage must satisfy the requirements described in 
Section 2.1.3, "Environmental and power requirements" when measured at the 
power supply connector pin (receiving end) of the optical disk drive (For other 
requirements, see items (4) and (5) below). 

(2) Current waveform (reference) 

Figure 3.8 shows the current waveform while a disk is inserted. 

 

(3)  Power on/off sequence 

a)  In a system which uses the terminating resistor power supply signal 

(TERMPWR) of the SCSI bus, the requirements for +5 VDC given in Figure 
3.9 must be satisfied between the drive and at least one of the SCSI devices 
supplying power to that signal.