Radio Shack 273-1687 - Manual (Page 7)

7
Selecting the
A
d
aptaplug
tip on the device’s power jack is
negative, align
– (negative) to TIP .
If you use the special Dell plug,
align
TIP on the Dell plug with TIP
marked on the output socket. ±
4. Insert the Adaptaplug into the
device to be powered, then insert
TIP –
TIP
++++
±
"016'"
±
"
If the polarity symbol is
not displayed on the
device to be powered, it
might appear on an ID
plate on the computer
power supply or the
original power adapter
(see “Compatible
Computers” on
Page 11).