Rotel-RT-622-Owners-Manual

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TABLE OF CONTENTS
INTRODUCTION ci icici ces
REAR PANEL CONNECTIONS ..
INSTALLATION cr rien
; FRONT PANEL CONTROLS...
SPECIFICATIONS ......... creer RER
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INTR
We would like to take this opportunity to thank you for
purchasing our Stereo Tuner. With the high quality design
and workmanship that goes into making this equipment,
you can be assured of its flawless performance for many
years to come.
We have fitted every control and feature you could
conceivably need. Designed for both versatility and ease
of operation, this piece of equipment will add professional
studio flexibility to your Hi-Fi sound center. The
ODUCTION
experience true high fidelity as never before. Its full and
natural stereophonic reproduction offers you musical
entertainment approaching that of live performances. We
sincerely hope you will treasure this professional
equipment. In order to obtain the maximum use out of
your unit, please read the following pages of this Owner's
Manual carefully.
Do not attempt to operate the unit until you have made
all the necessary connections.
performance is exceptional; it will allow you to
7582 COAXIAL
ANTENNA
HOLDING BRACKET
OUTDOOR
FM ANTENNA
REAR PANEL CONNECTIONS
| OUTDOOR
| AM ANTENNA
AM FERRITE BAR ANTENNA
AUTION: DISCONNECT: SUPPLY CORD: B
ALENT EEL do
AC POWER CORD
AC OUTLET, UNSWITCHED
(MAX 200W)
\ J
\ = | AC FUSE
INDOOR — VARIABLE OUTPUT 1A, 100—120V
EM ANTENNA 0.5A, 220—240V
30082
GROUND INPUT
STEREO PRE-MAIN
AMPLIFIER
STEREO PRE-MAIN
AMPLIFIER
INSTALLATION
IMPORTANT: Do not apply power to this unit without
first making sure that all the necessary connections are
properly made.
AM ANTENNA CONNECTION
No external antenna will generally be required for AM,
since a ferrite loopstick antenna is supplied at the rear of
the unit. For best possible reception, extend the loopstick
fully away from the tuner chassis.
If you live in a difficult reception area, the use of an
external or outdoor antenna may be desirable. Connect a
single wire antenna lead to the terminal marked AM on
the rear chassis. The wire antenna should be as long as
possible, and oriented for best reception. It must be kept
away from large metal objects, power lines or electrical
machinery to insure reception without extraneous noise.
FM ANTENNA CONNECTION
Owing to the high sensitivity of the FM tuner section of
the unit, the antenna wire supplied is sufficient for most
locations. Connect this to both FM antenna terminals
marked 300 ohms, and mount horizontally, for instance
by tacking to the shelf on which the receiver is mounted.
In difficult reception areas, the use of an outdoor antenna
may prove necessary. Follow its instructions for proper
connection.
When using a 75-ohm unbalanced coaxial cable for
antenna, connect between 75-ohm and G terminal posts
with the outer conductor or shield of the cable connected
to the G terminal after fixing the cable through the
holding bracket.
GROUND
Although it is not necessary to do so, but if you wish to
ground the tuner, connect a wire from the terminal
designated GND on the rear chassis to the ground terminal
on your amplifier or to a nail driven into the earth.
VARIABLE AND NON-VARIABLE OUTPUTS
There are two pairs of output jacks designated LEFT and
RIGHT on the rear chassis. The left hand pair is a
standard, non-variable output for use with most standard
amplifiers. These pair of output should be connected to
the corresponding left and right input (TUNER or AUX)
jacks on your amplifier. For your convenience, the
connecting cables for this purpose are supplied with this
unit.
The right hand pair is a variable output of which output
level can be varied from О to 0.3V (30%, 400Hz) for AM
and from O to 1.5V (100%, 400Hz) for FM with the knob
marked VARIABLE on the right hand side. This output is
for use with amplifiers whose input level requirements are
different from the standard amplifiers. The VARIABLE
knob at its left most position is 0 output. Turning it to
the right will increase the output level proportionately,
and at its right most positon, the output level will be at
maximum (same level as that for standard output).
To achieve appropriate output level for your amplifier's
input requirement, set the VARIABLE knob to the
position where the sound from the speakers is equally
loud as when a record player is played through your
amplifier (with the volume setting set at the same level).
AC POWER INPUT CORD
Your tuner has been specially designed so that it may be
connected to a variety of power sources. You may
connect the AC Power Input Cord directly to a wall plug,
in which case the power will be supplied to the tuner
independent of your amplifier. Or, you may connect it to
your amplifier's switched or unswitched AC outlet. If it is
connected to a switched outlet, by leaving the Power
button of the tuner on, you will be able to maintain
switching control for the tuner with your amplifier. If it is
connected to an unswitched outlet, like connecting to a
wall outlet you must use the tuner's own power button
for switching control.
VOLTAGE SELECTION
The tuner is a variable voltage equipment that can run on
100V, 117V, 220V or 240V power supply. Your unit
comes already preset at the proper voltage for use in your
area; however, if you move to an area where the power
supply voltage is different, the voltage setting can be
manually changed. BE SURE THAT YOUR UNIT IS NOT
CONNECTED TO THE POWER SOURCE BEFORE
ATTEMPTING TO MAKE THIS CHANGE.
To change the voltage setting, remove the cabinet and
locate the VOLTAGE SELECTOR (see figure below). Pull
up the Voltage Selector plug which has a white arrow on
its top. Reinsert the plug to the Selector Base so that the
head of the arrow lines up with the pointer line of the
voltage you desire.
240V — 1 rm 117Yv
og + Jo
220V— —00V
CONNECTING TO POWER SUPPLY
Before connecting up ensure that the voltage selector is
set correctly for your supply, and a suitable plug fitted. If
you need to fit a plug, ensure live, neutral and (where
appropriate) earth leads are connected to the proper
terminals.
The unit is protected with a 1 amp fuse in the AC input
LUMINATED DIAL POINTER
NCTION INDICATOR LIGHT
ЕВЕО INDICATOR LIGHT |
EF 30 92 94 96 98 100 102 104 106 108 MHz
EE
WER SWITCH
URCE SELECTOR CONTROL
TUNING KNOB: heavy flywheel action allows easy and
srecise tuning on both AM and FM stations.
SOURCE SELECTOR CONTROL: enables you to select
the program you desire from AM, FM AUTO, STEREO
ONLY (FM) and FM MONO.
EEE
pr
circuit. When replacing a fuse, be sure to use a fuse of the
same rating. DO NOT replace with a fuse of higher rating.
Protection will be lost, and severe damage to the unit may
result.
If in any doubt about connecting the power supply,
consult a qualified electrician.
SIGNAL STRENGTH TUNING METER
—————FM TUNING METER
NS
ЕСА
TUNING KNOB
- MPX FILTER SWITCH
MUTING SWITCH
MPX FILTER SWITCH: allows you to reduce annoying
noise mixed in with signal. This switch, however, should
not be always left at IN position unless it is necessary.
|
MUTING LEVEL CONTROL |
MUTING SWITCH: allows you to activate a circuit to
reduce annoying interstation noise in FM band. Púsh “IN”
to activate and push OUT to deactivate. The switch is
used in conjunction with the MUTING LEVEL control
which varies effect of muting.
MUTING LEVEL CONTROL: allows you to vary the
effect of reducing interstation noise in FM band, and is
activated only when the MUTING switch is activated.
Turn clockwise to strengthen muting effect and counter-
clockwise to weaken Refer to OPERATION section in this
owner's manual for usage.
POWER SWITCH: supplies power to the tuner. When the
switch is ON, dial scale will be illuminated.
FUNCTION INDICATOR LIGHT: visually indicates the
selected program FM or AM.
STEREO INDICATOR LIGHT: automatically lights up
on the dial glass to visually indicate whenever an FM
stereo broadcast is tuned.
SIGNAL STRENGTH TUNING METER: shows the level
of the incoming signal. When used in the AM position,
tune for maximum deflection to the right for best
possible reception. When used in the FM position, also
tune for maximum indication but operate in conjunction
with the FM tuning meter.
FM CENTER TUNING METER: designed to operate on
a null or “zero” center principal. Tune for the dead center
position for best possible reception and minimum
distortion.
Having made all connections according to the preceding
instructions and become familiar with the functions of the
unit, you are ready to operate the equipment. Apply
power by plugging into the power source and pushing in
the POWER button.
PRELIMINAR Y CHECK: If the dial scale has failed
illuminate, remove and check the AC fuse. If the fuse is
blown, check possible reasons for the blow-out (e.g.
defective AC power cord, etc.) and replace the fuse.
RECEIVING FM AND AM BROADCASTS
1. FM STEREO
Under normal use for all FM broadcasts the source
selector control should be placed in the FM STEREO
position. This tuner is equipped with a stereo sensing
circuit which will automatically determine whether your
unit is receiving monophonic or stereophonic broadcasts,
and then automatically adjust the mode of operation. If
the station is transmitting stereo, your tuner will
automatically switch on the multiplex section and you
will hear the broadcast in full stereo. Should the station
conclude broadcasting in stereo, your tuner will
automatically switch back to monophonic reception.
2. FM
Should you wish to receive monophonic signal, or weak
stereo signal whose quality has been degraded by noise
and poor signal conditions and so may be necessary to be
heard in mono, turn the source selector control to FM.
Tune for the desired station with the tuning knob, using
the tuning meters to assure the strongest possible
reception.
3. AM
Should you wish to listen to AM broadcasts, turn the
SOURCE SELECTOR control to AM. Though AM gives
only monophonic signal, the tuner will convert the signal
to two channels enabling you to listen from two speakers
as in stereo.
MUTING
Whenever you tune for an FM station, you will hear rather
loud interstation noise; this is normal for all highly
sensitive FM tuners and is not peculiar to this tuner.
To reduce this bothersome interstation noise, your tuner
is equipped with a unique MUTING control. Muting is
effected by pushing the MUTING switch “IN”, but the
level of muting may be varied to suit your purpose by
adjusting the MUTING LEVEL control. Muting is ad-
justable from 3uV muting at the left most position of the
control to the maximum muting (20uV) at the right most
position.
If you wish to tune in a weak station, set the MUTING
LEVEL control at relatively low position so that muting
will not suppress the weak signals. For tuning in strong
stations, the MUTING LEVEL control may be set at
maximum.
The MUTING switch should normally be turned OFF
when you have tuned in the desired station, but it may be
left ON without causing perceptible effect upon program
reproduction. Again, however, if you have tuned in a
weak station, the MUTING switch should definitely be
turned OFF to assure strongest possible signal reception.
- SPECIFICATIONS
FM Sensitivity (IHF) oo... 1.7 UV
Frequency Range ................. 88 — 108 MHz
Harmonic Distortion ............. less than 0.5%
Signal to Noise Ratio ............. 70 db
Capture Ratio serrure 1.5 db
Selectivity nca sacs as n annee 60 db
Stereo Separation .............—..... 40 db at 1 kHz
Image Rejection .................... 100 db
IF Rejection ...........e.eeenrvevenes 100 db
Spurious Response Rejection ... 100 db
AM Sensitivity (IHF) .... e. 15 uV
Frequency Range .................... 535 — 1605 kHz
Image Rejection ..................... /5 db at 1 MHz
IF RejectiON ss eee... 75 db at 1 MHz
Signal to Noise Ratio........ „50 db
Selectivity ee ......40 db
DIMENSIONS ...... 16-1/2" (W) x 12” (D) x 5-1/2” (H)
WEIGHT ........ eee 17 Ibs/8 kg
Note: features and specifications subject to changes for improvement without prior notice.
Roland Electronics Co., Ltd. 1-30-8 Ohokayama, Meguro-ku, Tokyo, Japan
Printed in Japan, Jul. 73

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