HK 3370 (serv.man10) - Harman Kardon Audio User Guide / Operation Manual. Page 12

12 OPERATION

The HK 3370 is simple to operate, and very simi-
lar to stereo receivers you may have used in the
past. This section will explain the use of several
features that may be new to you.

• Install the two supplied AAA batteries in the
remote as shown. Be certain to observe the (+)
and (–) polarity indicators shown in the bottom
of the battery compartment.

• When using the HK 3370 for the first time, it
will be necessary to press the Main Power but-
ton 1 on the front panel to turn the unit on.
This places the unit in a standby mode, as indi-
cated by the amber color of the Power Indi-
cator 3. Once the unit is in standby, you may
begin a listening session by pressing the System
Power Control 2 on the front panel or the
Main Power On button å on the remote. Note
that the Power Indicator 3 will turn red, then
green. This will turn the unit on and return it to
the input source that was last used. The unit may
also be turned on from standby by pressing any
of the Source Selector buttons on the front
panel 89!#$& or remote ç.

To turn the unit off at the end of a listening ses-
sion simply press the System Power Control
2

on the front panel or the Main Power Off

button ∫ on the remote. This places the unit in
the Standby mode, and the Power Indicator
3

will turn amber to remind you that the unit is

ready for operation when a power command is
received from the remote.
Power to any equipment plugged into the rear
panel Switched AC Outlet

 will be shut off.

When the remote is used to turn the unit “off”, it
is actually placing the system in a standby mode,
as indicated by the amber color of the Power
Indicator 3.

When you will be away from home for an
extended period of time it is always a good idea
to completely turn the unit off using the front
panel Main Power Switch 1.
Note that due its EEPROM backup system the
HK3370 will retain information such as pro-
grammed presets for a virtually infinite time (see
”Memory Backup”, page 14).

• To dim the brightness of the front panel dis-
play, press the Dimmer button ˙ on the
remote or on the front panel ^.

The first press will dim the lights to half normal.
A second press will turn the display completely
off. Press the Dimmer button ˙^ again to
restore the display to normal brightness.

• To select a source at any time, press any of the
Source Selector buttons on the remote ç or
front panel 89!#$&.

• During a listening session you may wish to
adjust the Bass Ó, Treble Ô and Balance


controls to suit your listening tastes.

• Adjust the volume to a comfortable level using
the front panel Volume Control Ò or remote
Master Volume Up/Down π buttons. The vol-
ume level is displayed by the position of the
Volume Indicator Ú. Think of the Volume
Control knob Ò as the face of a clock, with the
Volume Indicator Ú indicating the hour. The
HK 3370 is playing at the minimum volume level
when the Volume Indicator Ú points to 7
o’clock; when the Volume Indicator Ú points
to 5 PM, the HK 3370 is playing at the maximum
volume level. It is important that you make sure
never to exceed this maximum volume level at
any time, in order to avoid possible damage to
your loudspeakers due to “clipping”, a type of
distortion that is not audible to the human ear
until it is severe enough to permanently damage
most loudspeakers. It is also possible, depending
upon the program material, for clipping to occur
at volumes below the maximum volume level.

• To temporarily silence all speaker outputs, press
the Mute button ®5. This will cut the output
to all Pre and Sub Outs and to all speakers, but it
will not affect any recording or dubbing that may
be in progress. When the system is muted, the
MUTE indicator will light in the Main Infor-
mation Display Û and the Volume/Mute
indicator Ú will flash. Press the Mute button
®5

again to return to normal operation.

• For private listening, plug the 6,3 mm stereo
phone plug from a pair of stereo headphones
into the front panel Headphone jack 4.

• One or two separate sets of speakers may be
connected to the HK 3370. To listen to one of the
speaker sets, press the Speaker button 6 or
7

on the front panel corresponding to the

desired speakers or press them both to listen to
both speakers pairs. The active speakers will be
indicated by a lit green LED in the Speaker
Indicators Ù display. Both sets of speakers
may be turned off for private headphone listen-
ing.

IMPORTANT NOTE: When two speaker pairs
are connected to the HK 3370RDS and are to  be
used simultanously, the impedance of each
speaker must not be lower than 8 Ohms.

• To program the HK 3370 for automatic turn-
off, press the Sleep button on the front panel
(

or remote ©. Each press of the button will

increase the time before shutdown in the follow-
ing sequence:

The sleep time will be displayed in the Main
Information Display Û and it will count
down until the time has elapsed.

When the programmed time has elapsed, the
unit will automatically turn off (to Standby
mode). Note that the front panel display will dim
to one-half brightness when the Sleep function is
programmed. To cancel the Sleep function, press
the Sleep button (© or simply hold it pressed
for some seconds until the Sleep indicator num-
bers disappear and the Main Information Display
shows the current source. Pressing any control
button while the Sleep control is activated will
momentarily return the Main Information Display
to full brightness for increased legibility without
interrupting the Sleep function.

The HK 3370’s tuner is capable of tuning AM, FM
and FM Stereo broadcast stations. Stations may
be tuned manually or automatically, or they may
be stored as favorite station presets and recalled
from a 30-position memory.

Station Selection
1. Press the AM/FM & buttons on the front
panel or on the remote ç to select the tuner as
an input.

2. Press these buttons again at any time to
switch between AM and FM.

3. To automatically search for the next higher- or
lower-frequency station that has an acceptable
signal hold the Tuning 

D

or 

E

button ) on

the front or î or † on the remote pressed and
release it as soon as the tuner starts the frequen-
cy search. To tune to the next station, press the
button again. Tap the Tuning button to advance
one frequency increment at a time, or press and
hold it to locate a specific station. When the
TUNED indicator lights, the station is properly
tuned and should be heard with clarity.

4. Stations may also be tuned directly by pressing
the Direct button ∆, and then pressing the
Numeric Keys ˚ that correspond to the sta-
tion’s frequency. The desired station will auto-
matically be tuned.

NOTE: When the FM reception of a stereo
station is weak, audio quality will be increased
by switching to Mono mode by pressing the FM
Mode button * ß until the STEREO indicator
goes out.

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