HK 690 (serv.man4) - Harman Kardon Audio User Guide / Operation Manual. Page 5

ENGLISH

4

Press the round Power button to turn the
amplifier on for the first time. The status
LED behind the flat power button will
turn green. Once the unit has been
turned on with the round power button,
this button should be left on for normal
use and only turned off when the
amplifier will not be used for extended
periods of time (vacation, etc.). For daily
use, press the flat power button or
Power on the remote control to turn the
amplifier on or off (Standby). In Standby
the LED will glow red, indicating that the
unit is still connected to AC mains and
can be turned on from the remote control
or with the flat power button.

Plug in headphones if desired. With both
Speakers 1 and 2 switches in Off
position, output is supplied only to
headphones.

Push to select either of two sets of
speakers, or both, or neither (headphone
output only).

Select desired input source by pressing
the corresponding button.

Turn to increase or decrease the amount
of low frequency sound.

Turn to increase or decrease the amount
of high frequency sound.

Turn to adjust relative output level of left
and right speakers.

Turn to raise or lower output volume.

Press to bypass tone control curcuitry.