AMC CVT3030 User guide

AMC
o
CCVT Integrated
A~lfier
CVTS030
H.O.M.E.
AUTOMATION
SERIES
va.l.OE
ö
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6 ö
a-"iJ=
0
PHONES
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INSTRUCTIONS FOR INSTALLATION AND OPERATION

A CAUTION: TO REDUCE
THE RISK
OF
ELECTRIC
SHOCK,
DO
NOT REMOVE
COVER (OR BACK),
NO
USER-SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO QUAUFIED
SERVICE PERSONNEL.
A ATTENTION
A'
AFIN
DEV1TER
UN
CHOC ELECTRIQUE
ET LES CONSEQUENCES
GRAVES CUI POURRAIENT
EN
~SUl
TER,
TENTEZ
PAS D'OUVRIR L'APPAREIL
ET OE
TauCHER
AUX
cor.tPOSANTS INTERNES
SAHS LA
~SENCE
D'UNE
PERSONNE CUAUFIEE. '
A
PARA REDUCIR EL RIESGO
OE
SACUDIDAS ELECTRICAS,
NO DEBERA QUITARSE LA
TAPA
(NI
PARTE POSTERIOR).
CONSULTESE AL PERSONAL
CAPACITADO PARA LAS
REPARACIONES INTERNAS.
WARNING: TO PREVENT FIRE
OR
ELECTRIC SHOC!<, DO NOT EXPOSE THIS APPLIANCE TO RAIN
OR
MOISTURE.
AOVERTENICIA: PARA
EVTTAR
EL RIESGO
OE
INCENDIO 0 SACUDIDA ELECTRICA, NO DEBERA EXPONERSE
ESTE
APARATO A LA LLUVIA 0 HUMEDAD.
CAUTION:TOPREVENT ELECTRICSHOCKDONOTUSETHIS (POLARISED) PLUG WITH AN EXTENSION CORD,
RECEPTACLE
OR
OTHER OUTLET UNLESS THE BLADES CAN
BE
FULLY INSERTED TO PREVENT BLADE
EXPOSURE.
ATTENTION: POUR PREVENIR
LES
CHOCS ELECTRIQUES NE PAS UTILISER
CEITE
FICHE POLARISEE AVEC
UN PROLONGATEUR. UNE PRISE DE COURANT OU UNE AUTRE SORTIE
DE
COURANT, SAUF SILES LAMES
PEUVENT
ETRE
INSEREES A FOND SANS
EN
LAISSER AUCuNE PARTIE FOND SANS
EN
LAISSER AUCUNE
PARTIE A DECOUVERT.
PRECAUCION: PARA EVITAR SACUDIDAS ELECTRICAS, NODEBERAUTILIZARSE ESTACLAVIJAPOLARIZADA
CON
UN
CORDON
DE
PROLONGACION, RECEPTACULO U OTRO TIPO
OE
SALIDA A MENOS QUE
SE
HAYAN
INSERTASO COMPLETAMENTE
LAS
LENGÜETAS PARA EVITAR
SU
EXPOSICION.
NOTE: Some AMC products are equipped with dual
or
multi-voltage transformers (which is indicated on the back
panel), Ifyou wish
to
change thevoltage, please bring yourunit
to
an authorised AMC servicetechnician for internal
conversion.
ATTENTION: Quelques pieces AMC sont munies de transformateurs adouble ou a multi-voltage (indique au
panneau arriere).
Si
vous voulez changer le voltage, veuillez apporter votre appareil au fournisseur
de
AMC pour
le
transformer.
ZUR BEACHTUNG: Einige AMC Geräte sind mit Umschaltern für unterschiedliche Netzspannungern ausgerüstet
(Ein Vermerk auf
der
Rückseite weist darauf hin),
DieAnpassung, wenn notwendig, mußvon einem qualifizierenTechniker
in
einerAMC Servicestationvorgenommen
werden.
NOTA: Ciertos componentes
de
AMC esmn dotados
de
transformadores
de
doble
tensi6n 0
de
varias tensiones
(10
que
se
indica en
el
panel posterior). Si se desea cambiar la tensi6n, sfrvanse lIevar
el
aparato a un tecnico
autorizado
por
AMC para su conversi6n interna.
NOTE to
CATV
systems installer: This reminder is provided
to
call the CATV system installer's attention
to
Article
820-22
of
the NECthat provides guidelines
for
propergrounding and, in particular, specifies that the cable ground
shall be connected
to
the grounding system
of
the building, as close
to
the point
of
cable entry as practical.
NOTAPARA
EL
INSTALAOOR
OE
ANTENAS
OE
TELEVISION COLECTIVAS:
La
presente advertencia
se
provee
para lIamar la atenci6n dei instalador
al
Artfculo 820-22
de
NEC (C6rdigo Electrico Nacional)
donde
se
facilitan las
directrices para la pertinente puesta a tierra y que especifica
en
particular que
el
condutor a tierra dei cable debe
conectarse
al
sistema
de
conexi6n a tierra dei edificio,
10
mas proximo posible
al
punto
de
entrada dei cable.
~
he
lightning flash with arrowhead, within
an
equilateral
triangle, is intended to alert the user of the presence
of
uninsulated "dangerous voltage" within the product's
enclosure; that
may
be of sufficient magnitude to
constitute a risk of electric shock to persons,
~
he
exclamation point within an equilateral triangle
is
intended to alert the user
of
the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the
appliance.

INTRODUCTION
The AMC CVT 3030 has been designed to give
superb
sound
quality
and
represents
outstanding value for money.
The CVT 3030
is
a hybrid mosfet valve design,
capable of giving superb sound reproduction.
Thecomponents are
all
ofthe highestquality, but
there are a few simple hints to follow
in
order to
get the best from your new amplifier.
1)
00
not stand any object or other component
on the top. Whilst the 3030 is one of the
coolest running Class Avalve amps avallable,
uninterrupted air flow
is
most important.
2)
There are two silent fans
in
the
base
under
each pair of
EL34
valves. Again, the airspace
under the amp must not
be
restricted
in
any
way. Never stand the unit on a carpeted
surface
or
anything soft,
or
on another
component which generates heat.
3)
The amplifier will sound best when it is
'warmed up', this can take 15-20 minutes
avoid operating the PHONES/NORMAL/
OIRECT
switch during this period.
4)
The valves should last avery langtime butcan
be
changed easily. However, as there
is
always same voltage present inside, even
when the unit
is
turned off, we recommend
that this
is
carried out by your AMC dealer, it
is
only a five minute job for
an
engineer.
5)
We
recommend you retain the original carton
and packaging so that it can
be
repacked
correctly if it ever becomes necessary to
transport the unit or return for service.
6)
After switching off, always letthe amplifiercool
down before turning on again.
2
INSTAlLATION
Your AMC amplifier is supplied set to work on
your local malns supply voltage. Check that
your local mains supply voltage agrees with the
voltage setting indicatedon the back panel ofthe
amplifier. If not, please contact your dealer or
national distributorfor details on howto proceed
further.
The cores of the mains lead are coloured
in
accordance with the following code:
Blue -Neutral
Brown -
Live
Note: Export units for certain markets have
moulded mains plugs fitted
as
standard .
As the colours
in
the mains lead may not
correspond
with
the
coloured
markings
identifyingthe terminals
in
your plug, proceed
as
fallows:
The wire which is coloured blue must be
connectedtotheterminalwhich
is
marked bythe
letter
N,
or coloured black or blue. The wire
which is coloured brown must be connected to
the terminal which
is
marked by the letter
L,
or
coloured red or brown.
FUSES
If the mains plug
is
fused, fit a 3amp fuse.
Your AMC amplifier contains fuses which
are
designedto protectthe amplifier and preventthe
occurrence of a dangeraus fault condition.
These should only be inspectedand replaced by
a
competent
engineer
using
the
correct
replacement types.

REAR
PANEL
CONNECTIONS/FRONT
PANEL
CONTROLS
REAR PANEL
1
"
PttCK)
1»"
CZt
~
-..c
_
L~
R
-{()------1~o--,~ft_-ft-A
1.
PHONO
GROUND
TERMINAL
2.
PHONO
MM
INPUT
3.
DATINPUT
4.
CD
INPUT
5.
TUNER
INPUT
6.
VIDEO
INPUT
FRONT PANEL
AMC CCVT Integrated
A~lfier
CVT3030
H.O.M.E.
AUTOMATION SERIES
o
••
ss
1 2 3 4 5
1.
POWER
SWITCH
2.
PHONES
3.
PHONES/NORMAUDIRECT
SWiTCH
4.
BASS
CONTROL
7.
AUXlUARY
INPUT
8.
TAPE
INPUT
9.
TAPE
OUTPUT
10.
LOUDSPEAKER
TERMINALS
11.
AC
CONVENIENCE
OUTLETS
12.
AC
UNE
CORD
VOLlIoE
6 7 8
5.
TREBLE
CONTROL
6.
TAPE
MONITOR
SWITCH
7.
INPUT
SELECTION
SWITCH
8.
VOLUME
CONTROL
3

REAR
PANEL
CONNECTIONS
A/COUTLET
The AlC convenience outlet
is
fitted sothatother
components
can be
powered
when
your
amplifier is switched on. You must fit
an
European Standard two pin plug, avallable from
most speciallst dealers.
UNDER
NO
CIRCUMSTANCES SHOULD THE
CASE
OF
THE AMPLIFIER
BE
OPENED
BY
ANYONE
OTHER
THAN
A
QUALIFIED
ENGINEER,
AS
DANGEROUS
VOLTAGES
ARE
PRESENT INSIDE. ANY UNAUTHORISED
REPAIR
MAY INVALIDATE
YOUR
WARRANTY.
INPUTS
All
audio Inputs and tape outputs are via gold
plated
RCA
type phone connectors.
All
the
phono sockets on your AMC amplifier are
marked 'L' for lett and 'R' forright channels, with
the left channels nearer the top of the cabinet.
Your connection leads will have a white er black
plug for left, and a red plug for right.
DISC INPUT
The
input
is
suitable
for
moving
magnet
cartridges only. The plugson yourturntable lead
should be connected to the disc input sockets
on the rear panel cf your amplifier.
To minimise hum, the turntable lead should
be
kept away from the mains wiring, and any
.separateturntable lead shouldbe attached firmly
to the earth terminal on the rear ofthe amplifier.
. CD INPUT
The
CD
input
is
suitable for use with any
CD
player. Connect your
CD
player to the amplifier
using the phono sockets market
CD.
VIDEO
The video input
is
suitable for most VCR's with
an
audio output. Connect your
VCR
using the
phono socket marked 'Video'.
4
DAT
The DAT input
is
suitable for use with any
DAT
player. Connect your DAT player using the
phono socket marked
DAT.
TUNER INPUT
The tuner input
is
suitable for use with most
AM/FM tuners. Connect your tuner to the
amplifier using the phono sockets marked
'Tuner'.
AUXILIARY INPUT
The auxiliary input
is
suitable for use with any
extra source precessing a line level output
(perhaps a second tuner
or
CD
player, or
an
additionaltape orvideo recorderwired for replay
only).
TAPE
INPUT
This input is suitable for use with most cassette,
reel
to reel
or
video recorders.
Connectthe 'record' leads ofyourtape recorder
to the phono sockets marked 'Tape out' on the
rear of your amplifier using phono/phono leads.
Connect the 'playback' leads
of
your tape
recorderto the phono sockets marked 'Tape in'
on the rear ofyour amplifier using phono/phono
leads.
If your tape machine possesses
DIN
outputs,
then DIN/phono leads, or a DIN/phono adaptor
can
be
used. If you experlence level matehing
problems when using
DIN
connectors, please
consult your tape machine manufacturer.
LOUDSPEAKER CONNECTIONS
The loudspeaker output terminals will accept
4mm (banana) plugs, pin connectors, spade
connectors or bare wires.
The amplifier has speakeroutputsthatwill match
4-8 Ohm speakers. Confirm the impedance of
your speakers then connect as folIows:

For 8 Ohm Speakers, connect the negative
(black) speaker wire
to
the'common'
negative
binding post.
Then connect the positive (red) cable
to
the 8
Ohm red binding post.
Repeat for the right speaker.
For 4 Ohm speakers, the negative (black)
connections are the same as the 8 Ohm, butthe
positive
or
red connection must
be
to
the
4 Ohm
binding post. Your AMC amplifier is
capabIe
of
generating
high
peak
currents,
so
all
connections
must
be
checked
to
avoid
inadvertent short circuits, and to ensure a good
clean contact.
UNDER NO CIRCUMSTANCES SHOULD BE
OUTPUTS THE SHORTED TOGETHER.
5
FRONT,
PANEL
CONTROLS
POWER SWITCH
The amplifier is turned on by depressing the
power switch. The small indicator above the
switch
will
glow green. Before switching on,
always set the volume control to minimum to
avoid damage
to
your loudspeakers.
Note: YourAMC amplifierwill play music almost
immediately after being switched on. However,
in
common with other audiophile products, the
internat circuits take some time to stabilise fully,
and the best possible sound quality may not be
obtained until the amplifier has had some time
(possibly an hour
or
two)
to
warm up.
INPUTSELECTION
lhe
rotary input selector switch selects which
input signal (Phono, CD. Tuner
or
Aux) is fed
to
the power amplifier. The selected signal
is
also
fed
to
the 'Tape out' sockets for recording.
TAPE MONITOR SWITCH
The Tape Monitor switch is generally left in the
'Source'
position
so
that
the
programme
selected by the input switch is routed
to
the
loudspeakers/headphones. If the Tape Monitor
switch is turned tothe 'Tape' position, the signal
from
the
tape
recorder
is
routed
to
the
loudspeakers/headphones.
Ifyourtape machine is athree head type suitable
forAlBmonitoring,thenturningtheTape Monitor
switch
to
the 'Tape' position will allowfull off-tape
monitoring
of
the recorded signal
to
be carried
out via the loudspeakers/headphones.
VOLUME CONTROL
The Volume Control is of a split type and allows
you
to
adjust the levels
of
the left and right
channels for both loudspeakers independently.
Normally, the two halves of the contral knob
rotate together as they are locked together by a
friction clutch inside the volume control itself.
However, buyholdingthe rear partofthe contral
firmlywith the firstfinger andthumb ofone hand,
it is possible
to
alter the relative position of the
two parts ofthe knob, and thus compensate for

level differences caused
by
the nature
of
the
input signal
or
due
to
room acoustics.
TONE CONTROLS
The tone controls on yourAMC amplifier use low
colouration high overload margine (higher then
50V RMS.) circuitry to ensure the minimum
degradation
of
the music signal. They are
designed
to
graduallymodifythetonal emphasis
of
the
music
and
to
compensate
for
such
problems as difficult room acoustics.
If required, the tone controls can
be
completely
by-passed with a resultant increase in sound
quality. To
do
this, simplyturn the Direct/Phones
switch to the 'Direct' position.
With the Direct/Phones switch in the 'Normal'
position, thetonecontrolswill cuttheirrespective
frequencies when turned anti-clockwise and
boost them when turned clockwise. The flattest
response is found when
the
controls are in the
'12 o'clock' position. (DETENTED POSmON)
PHONES
The
headphone
socket
will
accept
any
headphones fitted with a standard quarter inch
(6.35mm) stereo jack plug. For private listening
via
headphones,
the
Direct/Phones switch
shouldbesetto'Phones',thus cuttingthe output
to your loudspeakers. In this position the tone
controls remain active. The mute feature
is
also
useful for situations where the output trom your
loudspeakers needs
to
be cut momentarily (eg
for a phone call etc).
-TAPE
RECORDING
All
sourees, Disc, CD, Tuner and Aux can be
-recordedviathetape connections. Torecord an
input, select the required source and set your
recorder
to
the record mode.
Torecordfrom onetape recorder
to
another, the
playback recorder should be plugged into the
Aux socket, and the racording machine into the
Tape socket. The input selector switch should
be set to 'Aux'. A recording can
now
be made
in
the normal way.
6
PLAYBACK
Set the Tape
Monitor
switch
to
the 'Tape'
position and
your
recorder
to
the playback
mode.
CHECK LIST
Should you have any difficulty in operating your
amplifier, switch off and check the following
before suspecting that a fault has developed:
No
power
and LED
not
iIIuminated
1.
Check that all mains supplies, connections
and fuses are good and that the power is
switched on.
Power
on
and LED iIIuminated
but
no
output
1.
Check that the amplifier
is
connected to the
desired inputand thatthe correct input on the
amplifier is selected.
2.
Check that
the
Ioudspeakers are connected
correctly
to
the power amplifier.
3.
Checkthatthe Direct/Phones switch is notset
to 'Phones'.
4.Check that the Tape Monitor switch is not set
to
'Tape'.
Power
on
and LED iIIuminated
but
output
from
one
speaker
only
1.
Check that the left and right channels of the
selected source are connected correctly and
that the input wiring is not faulty. If in doubt,
contact your dealer.
2.
Check that one section
of
the volume control
is not set to minimum.
Loud
hum
heard
through
loudspeakerswhen
disc
Is selected
1.
Checkthatthe ground lead from the turntable
(if fitted) is connected firmly to
the
ground
terminal on the rear
of
the amplifier.
2.
Check that the amplifier is correctly earthed
via the mains lead.
3.
Check that other transformers in the vicinity
are not radiating into your amplifier.

SPECIFICATIONS
Power output into 8/4 ohms............................................................................................... 30W
With both channels driven
Rated T.H.D. 45Hz-20KHz................................................................................................ 1.0%
1KHz clipping power into 8/4 ohms.................................................................................... 36W
Inputsensitivity
for
1W/3OW
into
8 ohms:
High level inputs................................................................................................... 34mV/180mV
Phono input.......................................................................................................... 0.5mV/2.7mV
Input impedance:
High level inputs............................................................................................. 20K ohms/100pF
Phono input.................................................................................................... 47K ohms/100pF
Frequency response:
Tone bypass 20Hz-20KHz....................................................................................... +
/-
0.5dB
Normal 20Hz-20KHz................................................................................................
+/-1.0dB
High level inputs -3dB ........................................................................................... 10Hz/80KHz
Signal
to
noise ratio (ref. 1W/8 ohms):
High level inputs
"A"
WTD................................................................................................. 80dB
Phono input
HA"
WTD........................................................................................................ 79dB
Separation 20Hz-20KHz ............................................................................................
...
>50dB
Tone control range:
Bass at 50Hz...............................................................................................................
+/-
8dB
-Treble at 10KHz ..........................................................................................................
+/-7dB
r Overall feedback ................................................................................................................14dB
f Dimensions (WxHxD) ..................................................................................... 430x112x288mm
Net weight......................................................................................................................... 14Kg
Shipping weight................................................................................................................. 15Kg
7

SAFETY
INSTRUCTION
1. READ INSTRUCTIONS
All
the safety and operating instructions should be read before the
appliance is operated.
2. RETAIN INSTRUCTIONS
The
safety and operating instructions should be retained for future
reference.
3.
HEED WARNINGS
All
warnings on the appliance and in the operating instructions
should be adhered to.
4.
FOLLOW INSTRUCTIONS
All operating and use instructions should be followed.
5. WATER
AND
MOISTURE
The
appliance should not be used near water- for example, near a
bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or
near a swimming pool, etc.
6. CARTS
AND
STANDS
The
appliance should be used only with a cart or stand that is
recommended
by
the manufacturer.
6A.
An
appliance
and
cart
combination
should be moved with care. Quickstops,
excessive force, and uneven surfaces
may
cause
the
appliance
and
cart
combination to overturn.
7. WALL OR CEILING MOUNTING
This equipment is not designed for use mounted on a wall or a
ceiling.
8. VENTILATION
The
appliance should be situated so thatitslocation or position does
not interfere with its proper ventilation. For example, the appliance
should notbe situated on a bed, sofa, rug, orsimilarsurface thatmay
block the ventilation openings; or placed in a built-in installation,
such
as
bookcase or cabinetthat
may
impede the flow ofair through
the ventilation openings.
9. HEAT
The
appliance should be situated away from heat sources such
as
radiators, heat registers, stoves, or other appliances (including
amplifiers) that produce heat.
10. POWER SOURCES
The appliance should be connected to
apower
supply only
of
the
type described in the operating instructions or as marked on the
appliance.
11. POWER-CORD PROTECTION
Power-supplycordsshould be routed so thatthey are not likelyto be
walked on or pinched
by
items placed upon oragainstthem, paying
particular attention to cords
at
plugs, comvenience receptacles, and
the point where they exit from the appliance.
12. CLEANING
The appliance should be cleaned only as recommended
by
the
manufacturer.
13. NON USE PERIODS
The powercord oftheappliance should be unpluggedfrom the outlet
when left unused for a long period oftime.
14. OBJECT AND LIQUID ENTRY
Care should be taken so that objects
do
not fall and liquids are not
spilled into the enclosure through openings.
15. SERVICING
The user should not attempt
to
service the appliance beyond that
described in the operating instructions. All other servicing should be
referred to qualified service personnel.
16. DAMAGE REQUIRING SERVICE
The appliance should be serviced
by
qualified service personnel
when:
a)
The power-supply cord
or
the plug has been damaged; or
b) Objects have fallen, or liquid has been spilled into the appliance;
or
c)
The appliance has been exposed to rain;
or
d) The appliance does not appear to operate normally
or
exhibits a
marked change in performance; or
e)
The appliance has been dropped, or the enclosure damaged.
17. POWER LlNES
(APPLIES TO TUNER AND RECEIVERS ONL
Y)
An
outdoor antenna should be located awayfrom power lines.
18. OUTDOOR ANTEN
NA
GROUNDING
(APPLIES TO TUNER
AND
RECEIVERS
ONL
Y)
H
an
outside antenna is connected to the receiver, be sure the
antenna system is grounded so as
to
provide some protection
againstvottage surges and built up static charges.
Section
810
cf
the National Electrical Code, ANSI/NFPA No. 70-1984,
provides information with respect to proper grounding of the mast
and
supportingstructure,grounding
of
the lead-in wireto an antenna
discharge
unit,
size
of
grounding
conductors,
location
of
antenna-discharge unit, connection
to
grounding electrodes, and
requirements for the grounding electrode. See Figure.
a)
Use No. 10
AWG
(5.3
mm~
copper,
No.
8
AWG
(8.4mm2)
aluminum, No.
17
AWG
(1.0mm~
copper-clad steel or bronze
wire,
or
larger, as a ground wire.
b) Secure antenna lead-in and ground wires
to
house with stand-off
insulators spaced from
4-6
feet (1.22-1.83 m) apart.
c)
Mountantenna discharge unitasclose as possible
to
where lead-in
enters house.
d)
Use
jumper
wire not smaller than No. 6
AWG
(13.3
mm
2) copper,
or the equivalent,
whena
separate antenna-grounding electrode
is
used.
See
NEC Section 810-210).
Antenna
Grounding
According
to
the
National
Electrical
Code
Ground
Clamp
Electric
Service
Equlpment
~Natlonal
Electncal
Code
Avallable
fram
Llbrary,
book
stores,
cr
National
Fire
Protecllon
Associatlon
(Batterymarch
Park.
Quincy.
MA
02269)
Antenna
DIscharge
Unlt
(~EC
Secllon
810
201
Groondmg
ConduClors
INEC-
SecI.on
810-21)
~Power
Service
Groundlng
-
Beetrode
System
(NEC'""
A,.
250
Pa,.
H)

WELTRONICS CORP.
LONDON/L.A.
C 1992
AMC
PRINTED
IN
TAIWAN
R.O.C.
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