AMC CVT2030MKII Programming manual

IA
CVT2030MKII
CCVT STEREO
POWER AMPLIFIER

2
The AMC CVT2030MKII has been de-
signed to give superb sound quality and
represents outstanding value for money.
The CVT2030MKII is a hybrid mosfet
valve design, capable of giving superb
sound reproduction. The components are
all of the highest quality, but there are a
few simple hints to follow in order to get
the best from your new amplifier.
1) Do not stand any object or other com-
ponent on the top. Whilst the 2030MKII is
one of the coolest running Class A valve
amps available, uninterrupted airflow is
most important.
2) There are two silent fans in the base
under each pair of EL34 valves. Again, the
air space 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.
4) The valves should last a very long time
but can be changed easily. However, as
there is always some 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 let the ampli-
fier cool down before turning on again.
Your AMC amplifier is supplied set to work
on your local mains supply voltage. Check
that your local mains supply voltage
agrees with the voltage setting indicated
on the back panel of the amplifier. If not,
please contact your dealer or national
distributor for details on how to proceed
further.
The cores of the mains lead are coloured
in accordance with the following code:
Blue -Neutral
Brown -Live
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
identifying the terminals in your plug,
proceed as follows: The wire which is
coloured blue must be connected to the
terminal which is marked by the 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.
If the mains plug is fused, fit a 3amp fuse.
Your AMC amplifier contains fuses which
are designed to protect the amplifier and
prevent the occurrence of a dangerous
fault condition. These should only be
inspected and replaced by a competent
engineer using the correct replacement
types.
Note:
FUSES
INTRODUCTION INSTALLATION

MD 2101 MD 2102 MD 2103
23
4
1
1,5
1.POWER SWITCH
3
REAR PANEL CONNECTIONS/FRONT PANEL CONTROLS
FRONT PANEL
REAR PANEL
1. INPUT MODULE
2. LOUDSPEAKER TERMINALS
3.
4.
5. MD21XX Modules;
MD2101, Standard Input Module
Included
MD2102, Bridge & Balanced Input
Module - Option
MD2103, Balanced Input Module -
Option
AC RECEPTACLE
AC OUTLET

4
INPUT MODULE
CVT2030MKII includes with MD2101,
Standard Input Module.
The inputs are via gold plated RCA type
phono connectors. The phono sockets on
your AMC amplifier are marked "L" for left
and "R" for right channels, with the left
channel nearest the top of the cabinet.
Your connection leads will have a white or
black plug for left, and a red plug for right.
MD2102, Bridge & Balanced Input Module
and MD2103, Balanced Input Module are
Options.
LOUDSPEAKER CONNECTIONS
AC RECEPTACLE
A/C OUTLET
The loudspeaker output terminals will
accept 4mm (banana) plugs, pin connec-
tors, spade connectors or bare wires.
The amplifier has speaker outputs that will
match 4-8 Ohm speakers. Confirm the
impedance of your speakers then connect
as follows: 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,
but the positive or red connection must be
to the 4 Ohm binding post. Your AMC
amplifier is capable of generating high
peak currents, so all connections must be
checked to avoid inadvertent short cir-
cuits, and to ensure a good clean contact.
Please use the power cord included with
the unit to plug into the AC RECEPTACLE
and wall AC outlet.
The A/C convenience outlet is fitted so
that other components can be powered
when your amplifier is switched on.
UNDER NO CIRCUMSTANCES SHOULD
THE OUTPUTS BE SHORTED
TOGETHER.
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
UNAUTHORIZED REPAIR MAY
INVALIDATE YOUR WARRANTY.

5
POWER SWITCH
Note:
The amplifier is turned on by depressing
the power switch. The small indicator
above the switch will glow blue. Before
switching on, always set the volume
control of your Pre Amp to minimum to
avoid damage to your loudspeakers.
Your AMC amplifier will play music
within a few minutes after being switched
on. However in common with other audio-
phile products, the internal 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.
FRONT PANEL CONTROLS

6
Should you have any difficulty in operating
your amplifier, switch off and check the
following before suspecting that a fault
has developed:
1. Check that all mains supplies, connec-
tions and fuses are good and that the
power is switched on.
1. Check that the amplifier is connected to
the desired input.
2. Check that the loudspeakers are con-
nected correctly to the power amplifier.
1. Check that the input wiring is not faulty.
If in doubt, contact your dealer.
1. Check that the amplifier is correctly
earthed via the mains lead.
2. Check that other transformers in the
vicinity are not radiating into your ampli-
fier.
No power and LED not illuminated
Power on and LED illuminated but no
output
Power on and LED illuminated but
output from one speaker only
Loud hum heard through loudspeakers
when disc is selected
CHECK LIST

7
SPECIFICATIONS
Weltronics Corp. reserved the right to improve its products at any time. Specifications
are subject to change without notice.
Power output into 8/4 ohms 0 W
With both channels driven
Rated T.H.D. 45Hz-20KHz 1.0%
1KHz clipping power into 8/4 ohms W
Input sensitivity for 1W/30W into 8 ohms mV/1250 mV
Input impedance 500K ohms/470 pF
20Hz-20KHz +/-0.5 dB
-3dB 10 Hz/80 KHz
"A" WTD 95 dB
UN-WTD 85 dB
Separation 20Hz-20KHz >65 dB
Overall feed back 14 dB
Dimensions (WxHxD) 430x112x288 mm
Net weight 13 Kg
Shipping weight Kg
...........................................3
With balanced bridged input module....................................50W
............................................
.....................................36
.......................230
........................................
Frequency response:
Signal to noise ratio (ref. 1W/8 ohms):
..................................................
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...................................................14
PHYSICAL

All the safety and operating instructions should be read
before the appliance is operated.
The safety and operating instructions should be retained for
future reference.
All warnings on the appliance and in the operating instructions
should be adhered to.
All operating and use instructions should be followed.
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.
The appliance should be used only with a cart or stand that is
recommended by the manufacturer.
An appliance and cart combination should be
moved with care. Quick stops, excessive force,
and uneven surfaces may cause the appliance
and cart combination to overturn.
This equipment is not designed for use mounted on a wall or a
ceiling.
The appliance should be situated so that its location or position
does not interfere with its proper ventilation. For example, the
appliance should not be situated on a bed, sofa, rug, or similar
surface that may block the ventilation openings, or placed in a
built-in installation, such as bookcase or cabinet that may
impede the flow of air through the ventilation openings.
The appliance should be situated away from heat sources
such as radiators, heat registers, stoves, or other appliances
(including amplifiers) that produce heat.
The appliance should be connected to a power supply only of
the type described in the operating instructions or as marked
on the appliance.
Power-supply cords should be routed so that they are not likely
to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs,
convenience receptacles, and the point where they exit from
the appliance
The appliance should be cleaned only as recommended by
the manufacturer.
The power cord of the appliance should be unplugged from the
outlet when left unused for a long period of time.
Care should be taken so that objects do not fall and liquids are
not spilled into the enclosure through openings.
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.
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 is
damaged.
(APPLIES TO TUNER AND RECEIVERS ONLY)
An outdoor antenna should be located away from power lines.
(APPLIES TO TUNER AND RECEIVERS ONLY)
If an outside antenna is connected to the receiver, be sure the
antenna system is grounded so as to provide some protection
against voltage surges and built up static charges.
Section 810 of the National Electrical Code,ANSI/NFPA No.
70-1984, provides information with respect to proper
grounding of the mast and supporting structure, grounding of
the lead-in wire to 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 (8.4 mm )
aluminum, No. 17 AWG (1.0 mm ) 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) Mount antenna discharge unit as close as possible to where
lead-in enters house.
d) Use jumper wire not smaller than No.6 AWG (13.3 mm )
copper, or the equivalent, when a separate antenna-
grounding electrode is used. See NEC Section 810-21(j).
1. READ INSTRUCTIONS
2. RETAIN INSTRUCTIONS
3. HEED WARNINGS
4. FOLLOW INSTRUCTIONS
5. WATER AND MOISTURE
6. CARTS AND STANDS
6A.
7. WALL OR CEILING MOUNTING
8. VENTILATION
9. HEAT
10. POWER SOURCES
11. POWER-CORD PROTECTION
12. CLEANING
13. NON USE PERIODS
14. OBJECT AND LIQUID ENTRY
15. SERVICING
16. DAMAGE REQUIRING SERVICE
17. POWER LINES
18. OUTDOOR ANTENNA GROUNDING
22
2
2
SAFETY INSTRUCTION
S3125A
PORTABLE CART WARNING
Antenna Lead
In Wire
Ground
Clamp
Electric
Service
Equipment
Power Service Grounding
Electrode System
(NEC Art 250 Part H)
Ground Clamps
Antenna
Discharge
Unit (NEC
Section 810.20)
Grounding Conductors
(NEC Section 810.21)
Antenna Grounding According to
the National Electrical Code
National Electrical Code
Available from Library, book
stores, or National Fire Protection
Association (Batterymarch Park,
Quincy. MA 02269).
AMC 21-4153

21R- 4255 PN: 21R-4255