5 FRONT PANEL CONTROLS
1 Main Power Switch: Press this button to
apply power to the HK 3470. When the switch is
pressed in, the unit is placed in a Standby mode,
as indicated by the Power Indicator 3 sur-
rounding the System Power Control 2. This
button MUST be pressed in to operate the unit.
To turn the unit off and prevent the use of the
remote control, this switch should be pressed
until it pops out from the front panel so that the
word “OFF” may be read at the top of the
switch.
NOTE: In normal operation this switch is left in
the “ON” position.
2 System Power Control: When the Main
Power Switch
1
is “ON,” press this button
to turn on the HK 3470; press it again to turn
the unit off. Note that the Power Indicator
3
surrounding the switch will turn green
when the unit is on.
3 Power Indicator: This LED will light in
amber when the unit is in the Standby mode to
signal that the unit is ready to be turned on.
When the unit is in operation, the indicator will
briefly turn red, and then change to green. A
red indicator during normal operation means
that the unit is in the Protect mode, and should
be turned off and then checked for a possible
speaker-wire short circuit.
4 Headphone Jack: This jack may be used to
listen to the HK 3470’s output through a pair of
headphones. Be certain that the headphones
have a standard 1⁄4" stereo phone plug.
5 Mute: Press this button to momentarily
silence the speaker output of the HK 3470.
6 Speaker 1 Button: Press this button to
turn the speakers connected to the Speaker 1
output terminals ‡ on or off.
7 Speaker 2 Button: Press this button to
turn the speakers connected to the Speaker 2
output terminals ° on or off.
Front Panel Controls
