EXP Computer CD Traveler Plus - Manual (Page 9)

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POWER SOURCE SWITCH is set to “PC” (Figure 4.a)
The PCMCIA power direct is selected. Thus, the CD-ROM
will obtain power from PCMCIA socket of your computer,
there for no external power (AC or batteries) will be required.
In the event that your computer can not supply enough power
Fig. 4.a to operate the PCMCIA CD-ROM drive, then you will have to use
external power as described below. Do not set the switch to this position if
you are using the Parallel Port connection.
POWER SOURCE SWITCH is set to “DC/BATT” (Figure 4.b)
The external power source is selected. In this condition, you
must apply AC adapter or batteries to CD-ROM drive. The
Parallel Port connection requires the switch setting in DC/Batt
position. Please note that the AC adapter has a priority over
the battery in powering the CD-ROM drive. In other words, if
you connect the AC adapter, the CD-ROM drive will draw power Fig.4.b
from the adapter regardless if the batteries are installed or not.
NOTE: If you choose to use external power, remember to apply external
power before enabling the PCMCIA interface card (booting the
computer or hot-inserting the card).
For the Parallel Port connection, user will also need to apply external
power before booting the computer.
If you failed to apply the external power first, the drive status will
remain NOT READY although the external power is applied later; it
may also result in CD-ROM drive abnormal condition. In this case,
reboot your computer again to enable the CD-ROM drive.
WARNING
Do not shift the POWER SOURCE SWITCH when the CD-ROM is
powered on.