ECOTEST DKG-21 Operating Manual page 21

A transparent window, with the dLCD (6) located behind it, is in the left
upper corner of the front panel. Two smaller windows for the optical system
of the infrared port (7) and the light-emitting diode indicator (8) are located
next to this window. In the top right corner of the front panel there is a
transparent window of the LED indicator (9) for displaying storage battery
charging process and its completion. Two membrane control keys (10) with
corresponding inscriptions are located in the right lower corner of the front
panel. A connector (11) for the charging device is located on the right
sidepiece of the body.
The printed circuit board is inside the body, where all elements of the
electric circuit, with an exception of the loudspeaker and the storage
battery, are located. The loudspeaker is located in a cylindrical sound
chamber done as a construct of the upper cover. The loudspeaker is
mechanically fastened and electrically connected with the circuit by three
contact springs located on the printed circuit board.
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