5
Place the device on the 4 rubber bumpers with the keys in front of you and the big
display, which you can feel, behind it.
Top:
All the keys can be found on the upper side. They can be divided into 3
groups: The first group on the left consists of 4 round keys. The second group, left
from the middle, consists of 3 rows and 3 columns of big square keys. The third
group, to the right, consists of 4 rows and 4 columns
Right side:
On the right side of the device, there are three outlets. The one nearest
to you is an earphone socket (earphones are optional and not included). Next to the
display are the other two outlets with the socket for an additional power supply
(optional, not included) is furthest away. The other one is a service outlet for our
technicians.
Bottom side:
On the bottom side of the device, you will find 4 rubber bumpers, the
loudspeaker grill and the battery compartment.
3: Power Supply
Batteries:
DoubleCheck XL operates with 4 1.5 Volt AA batteries. The battery
compartment is situated on the bottom side of the device. To insert the batteries,
turn over the device with the high position end showing to the right side. In the
middle of the bottom side you can feel a little notch. This is where you can open the
battery compartment. Please note that the lid opens to the right and is not
completely removable! Put the 4 batteries in the compartment with the flat
(negative) end of each battery contacting the spring. Close the lid until it locks in
place.
Power Supply:
DoubleCheck XL can also be operated with a power supply unit.
The power supply unit is not included in the delivery and has to be ordered
separately! The socket for the power supply unit is located next to the display: it’s
the front outlet on the right side of the device.
4: Keyboard Layout
The keyboard is divided into 3 groups: To the left there are 4 round keys, which we
call ‘auxiliary keys’. In the middle - next to the ‘auxiliary keys’ - is the ‘3 x 3 group’,
which consists of 3 row and 3 columns. The middle key of this group is the Menu-
key, which has tactile dots. To the right is the ‘4 x 4 group’, with 4 rows and 4
columns. The Equal-key (row 4, column 3) has a little tactile line.
In the following, we describe each row top down and group to group from left to
right.
Caution:
Replace the batteries as soon as the device
announces ‘battery weak’.
Summary of Contents for DoubleCheck
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