Franklin Deutsch/English Professor PRO BDS-1840 - Manual (Page 9)

48
Using the Special Features
Your unit is equipped with several
special features that many, but not all
BOOKMAN book cards use. To learn
if you can use the special features
with a particular book card, read its
User’s Guide.
Headphone Jack: The headphone
jack is designed for 3.5 mm, 35 ohm
impedance stereo headphones.
Caution: Monophonic headphones
will not work with this unit.
Volume Control: The dial, located
under the headphone jack, controls
the volume of the speaker or head-
phones.
AC Adaptor Jack: The AC/DC adap-
tor is in the 9 volt range within a cur-
rent range of 200 to 300 milliamperes.
This symbol indicates that the inner
core of the plug of an AC adaptor is
negative and that the outer part of the
plug is positive. If the symbol on our
AC/DC adaptor does not match the
above symbol, confirm its compatibility
at its place of purchase.
Speaker: The speaker is located on
the back of your unit, above the book
card slot. For best results, do not
cover the speaker with your hand.
Headphone Jack
Volume Control
AC Adaptor Jack