Harman Kardon AVR 55, Service Manual

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Operation
PCM Audio Playback
PCM (Pulse Code Modulation) is the
non-compressed digital audio system
used for compact discs and non-AC-3
laser discs. The digital circuits in the
AVR55 are capable of high-quality digital-
to-analog decoding, and they may be
connected directly to the digital audio
output of your CD or LV player.
Connections should be made to the
AC-3/PCM Optical
or
Coaxial
inputs
¶ f
on the rear panel, using whichever
input is not occupied by an AC-3 source
such as a DVD player.
IMPORTANT NOTE: PCM Audio play-
back is possible ONLY when the CD input
is selected. If you wish to use the AVR55
to decode the PCM audio track from a
Laser Disc player, you must first select the
CD input.
Tuner Operation
The AVR55’s tuner is capable of tuning
AM, FM and FM Stereo broadcast sta-
tions. Stations may be tuned manually,
or they may be stored as favorite station
presets and recalled from a 30 position
memory.
Station Selection
1. Press the
AM/FM
button 8 i to
select the tuner as an input.
2. Press the
AM/FM
button 8i again
to switch between AM and FM so that the
desired frequency band is selected.
3. Press the
Tuning Mode
button 6 q
to select manual or automatic tuning.
When the
AUTO
indicator is illuminated
in the main information display the
tuner will only stop at those stations that
have a strong enough signal to be
received with acceptable quality.
If the
AUTO
indicator is NOT illumin-
ated, the tuner is in a manual mode and
will stop at each frequency increment in
the selected band.
4. To select stations from the front panel
press the
Tune
button
9
. When
AUTO
indicator is illuminated each press will
cause the tuner to search for the next
highest or lowest frequency station that
has an acceptable signal. When tuning
FM stations in the auto mode, the tuner
will only select Stereo stations. To tune
to the next station, press the button
again. If the
AUTO
indicator is NOT
illuminated, tap the
Tune
button 9
to advance one frequency increment at
a time, or press and hold it to locate a
specific station. When the
TUNED
indi-
cator illuminates the station is properly
tuned and should be heard with clarity.
To listen to the station in stereo, press the
FM Mode
button
6
until the red
STEREO
indicator illuminates in the
front panel display.
5. To select stations using the remote,
press the
Manual Tune ‹‹ / ››
but-
tons
r
to select stations one at a time.
Alternatively, the
Automatic Tune

‹‹
/
››
 buttons
u
may be used to
scan only those stations with sufficient
strength for proper reception. Each press
of these buttons will advance the tuner to
the next station. For FM stereo reception
press the
FM Mode
button 6 q until
the
STEREO
indicator is illuminated.
NOTE: When the FM reception of a
station is weak, audio quality will be
increased by switching to mono mode
by pressing the
Tuning Mode
button
6 q
until the
STEREO
indicator
goes out.
Preset Tuning
Up to 30 stations may be stored in the
AVR55’s memory for easy recall using the
front panel controls or the remote.
To enter a station to the memory, first
tune the station using the steps outlined
above. Then:
1. Press the
Memo
button 4 u on
the front panel or remote. Note that the
MEMORY
indicator will illuminate and
flash in the information display.
2. Within five seconds, press the
Numeric Buttons
37 u correspond-
ing to the location where you wish to
store this station’s frequency. To enter a
station to memory location “30,” press
only the
0
button.
3. Repeat the process after tuning any
additional stations to be preset.
Recalling Preset Stations
• To manually select a station previously
entered in the preset memory, press the
Numeric Buttons
37 u correspond-
ing to the desired station’s location. To
select the station in location “30,” press
the
0
button only.
• To manually tune through the list of
stored preset stations one by one, press
the
Preset/Disc Skip
buttons
s
on
the remote.
AVR55 120 volt