Hum And Noise - Rotel RA-935BX Owner's Manual

©) Volume Control
Used to regulate the volume level. Turn clockwise to increase
the level and counterclockwise to reduce it. The control
permits either the combined or the separate adjustment of
the left and the right channels. Normally turn the dual
concentric knob as one for the combined adjustment. When
it is necessary for the separate adjustment of each channel
due to unbalanced sound levels between both channels, hold
the front part of the knob with one hand and turn the rear part
of the knob independently. Due to the high quality material
and construction used on the volume control for sound
quality, the sound level will not rise sharply at low settings.
Normally, the control is recommended to be set between
11:30 to 2:00 o'clock position with other Rotel's equipments
connected, but a finite adjustment will depend on the
sensitivity of your speakers.
(6) Recording Selector
Permits choose any input connected to the unit and feed it
directly to the TAPE 1 and TAPE 2 outputs on the back of the
unit for recording the selected input. However, note the
TAPE 1 input can be recorded by the TAPE 2 output, but the
TAPE 2 input cannot be recorded by the TAPE 1 output. It
is possible to record one source, e.g., CD or TUNER, while
listening to a different source such as AUX. When not
recording, ensure to set the selector at the center OFF
position to cut off the circuit completely from the signal path.
(2) Listening Selector
Allows choose any input connected to the unit. The selector
operates independently from the Recording selector above,
so you can listen to one source while recording another
different source.
WORDS ON OPERATIONS
Precautions
1. Before commencing operation, check to see if all
connections are properly made.
2. Always ensure to set the Volume control to the minimum
position before turning on the Power switch.
3. Make sure the Recording selector is at the OFF position
when listening to any source and not recording.
Tuner Reception
1. Set to the TUNER position on the Listening selector.
2. If possible, turn your tuner's power off when not
operating it. Although crosstalks are held to minimum by the
circuit design, this is the perfect way to cut off the signal from
the radio reception bleeding through to the other inputs
connected to the main unit.
Operating CD Player
1. Set to the CD position on the Listening selector.
2. Read the instruction manual of your player carefully to
maximize the full potential.
3. Using higher quality interconnecting cords between
your CD player and the amplifier may often improve sound
quality.
Tape Deck Playback
1. Set to the TAPE 1 or TAPE 2 position on the Listening
selector depending on which input your tape deck is
connected.
2. Use only a good quality cassette tape deck (in terms of
sound quality) or a DAT deck, etc. for maximizing the full
potential of the amplifier.
Recording with Tape Deck
1. Set the Recording selector to any input you wish to
record, and proceed the recording with your tape deck
connected to the TAPE 1 or the TAPE 2 outputs. If you have
two tape decks, you can only record the TAPE 1 inputs with
the TAPE 2 outputs. The TAPE 2 inputs cannot be recorded
by the TAPE 1 outputs.
2. During recording, operation of the Volume control
have noeffectontherecorded signal being fed to the
TAPE 1 or TAPE 2 outputs.
3. You may monitor recording signals by setting the
Listening selector to the same input as the Recording
selector. For example if you are recording CD, set the
Listening selector to CD.
Dubbing
When two tape decks are connected, you can dub (tape-
to-tape copy) one tape deck to the other tape deck. Note the
dubbing can only be done from the deck connected to the
TAPE 1 input to the other deck connected to the TAPE 2
output.
HUM AND NOISE
In any high fidelity installations, hum may be caused by the
interconnection of turntable, tuner, amplifier and speakers
as the result of wiring, different grounding or locations of
components.
lf hum is experienced with your unit, disconnect everything
but the speakers from the unit. Plug in the turntable and if
hum or howling appears, move it away from the speakers as
much as possible.
Note hum may also be induced by defective cable
connections or by running the cables too close to strong AC
field. When your unit picks up noise during the reception of
broadcasts, causes are mostly due to external objects such
as fluorescent lamps and house appliances using motor or
thermostat, or others than may induce noise.
Either relocating the unit away from the noise sources or
using an improved outdoor antenna may readily resolve the
problem. In the event you cannot find the cause, consult your
dealer or a qualified electrician.