icon Audio Stereo 60 MK 3, Инструкция по эксплуатации

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Page 6
source from the mains. One remedy for this is to
use an interconnect which only has the screen
connected at one end. Other causes of low-level
hum can be from adjacent equipment, so
experiment with moving equipment around to see
if this makes the hum better or worse.
One channel missing.
Usually ‘bad’ connection on either the input or the
speakers. Try swapping the connection over to
establish if the cause is:
(a) Input to the amp.
Sound will move to the
other channel.
(b) Amplifier or speakers.
Sound will not
move.
Strange noises coming from speakers
Turn volume to minimum on unused input, if
problem corrected either fault with source unit or
with connection. If noise persists, problem with
amplifier.
If a whole output valve glows red (other than the
heater), often accompanied by a hum through the
speakers, switch off immediately, and refer to Icon
Audio or a service engineer, as this could be valve
failure.
A valve that is lit up is not a guarantee that it is
working properly; conversely a valve that is not lit
up will not be working.
Valve Replacement
(see also section 7)
Valve life will depend upon such things as hours
of use and number of on/off cycles, the HT Delay
Circuit if fitted will extend the life of valves by not
stressing them when cold. It is not good practice
to remove the valves unnecessarily as this can
strain the pins and cause tiny air leaks.
Service:
Should you suspect a problem, you
should return the unit to your agent/dealer or Icon
Audio for a periodic service. In case of difficulty
you could email or phone us. You could also
return the valves to Icon UK for testing free of
charge. Carefully remove the valves (the KT88s
should be held by the base when removing, to
prevent damage) numbering them with a marker
or sticker from left to right from the front, in order
that that may be replaced in the same position.
They should be well packed in cardboard & foam
or similar, (Valves are very rugged if packed
properly).
6 Specification & Features
(Typical conditions @ 230v 50Hz)

KT120/KT88 output valves or eqv (e.g. 6550)

6SN7 phase splitter

6SL7 first stage amplifier

0D3 regulator

Hand wired point to point components

No printed circuit board

Ceramic valve bases for low noise/leakage

75w RMS* per ch Ultralinear 8 Ω KT120

65w RMS* per ch Ultralinear 8 Ω KT88

35w RMS* per channel Triode mode 8 Ω KT120

30w RMS* per channel Triode mode 8 Ω KT88

Typical gain 70 (integrated) 20 (power amp
mode)

Feedback: 4db High sens, 14db Low sensitivity

Signal to noise level better than -97db

Damping Factor= 13 @ 8 Ω triode & power amp mode

Freq response 20Hz (-0.2db)-20khz - 0db any power

Full power bandwidth 20Hz (-0.2db)-55khz - 3db

THD better than 0.25% at 40W

4 and 8 ohms output taps

Japanese EI transformer steel

LDT Low Distortion Tertiary output transformers

Choke regulated power supply

0D3 voltage regulator

Supplied with attractive valve cover

3 potted transformers to reduce transformer noise

High quality metal film & wire wound resistors

High quality polypropylene audio caps

Optional Jensen Copper, Silver or Alu foil caps

Japanese ‘Blue’ ALPS volume pot.

Rubicon/Nichichron power capacitors.

Audio wiring with silver Teflon cable

Valves carefully matched for best performance

Gold plated Input & speaker terminals

Inputs for CD, Tape, Tuner, Aux

Tape monitor output, buffered

300mv sensitivity for full output (High sensitivity)

950mv sensitivity for full output (Low sensitivity)

230/240volts, 240watts (500 max)

3.15 amp rear fuse (with spare)

Internal HT fuses (spares inside)

440W, 400D, 230H
, 35kg (Allow space for
connections and ventilation)

IEC mains lead, (plug 5amp fused)

CE, ROHS, WEEE compliant
* Refers to measured RMS voltage across 8 Ohms.
(Specifications subject to change, errors & omissions excepted 20/12/11)