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Trouble Shooting
Amplifier Dead
Check the 1 amp mains fuse which is in a fuse holder
which forms part of the mains socket on the power
supply switch. Replacements should be 20mm 1Amp
'anti-surge' or "T" type. These are available from Icon
Audio should you have any difficulty.
The fuse in the mains plug should be a 3 or 5 amp
fuse, although unlikely, this should be checked if the
amplifier fuse is OK.
No sound
Have you selected the right input? Are the
connections OK? Is everything switched on? Are the
speakers connected?
Distorted sound.
Try another source; if sound improves then it's
probably something wrong with the first source. If no
improvement try different speakers, if no improvement
could be an amplifier problem.
Hum Problems
These are generally caused by "bad" earths or bad
connections. A common cause is a 'hum loop' caused
by having to many earths, and may be identified by
unplugging each input 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' connections are on either the input or
the speakers. Try swapping the connection over to
establish if the cause is:
(a) Input to the amp.
channel.
(b) Amplifier or speakers.
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.
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 Life and Replacement
Valve life will depend upon such things as hours of
use and number of on/off cycles. As all the valves are
lightly loaded. As a rough guide we would estimate
life of approx 4 to 10 years. But this can vary. For
example a unit left on continuously for 6 months is
equal to 4,400 hours the nominal life the valves.
What can happen?
A valves is at the end of it life if one of the following
happens:
•
6SN7s are twin triode valves. One of the two heaters
may fail, causing no sound.
•
A valve could get "noisy" or "microphonic"
•
The emission (and therefore output and sound quality)
may fall off slowly.
•
The valve works intemittantly.
•
An air leak causes the silver "getter" material to turn
white.
It is essential that only the correct valves are used
as some similar looking valves have a different
pin connection and insertion could result in
damage to the amplifier and risk of electric shock.
Sound will move to the other
Sound will not move.
It is not good practice to remove the valves
unnecessarily as this can strain the pins and cause
tiny air leaks. Icon Audio are happy to replace valves
and check to performance of your amplifier, and
advise on the latest upgrades available.
Although the two original 6SN7 valves are normally
identical we suggest that if removed, they are
replaced in the same position. You could mark them,
e.g. with a felt tipped pen.
Service: Should you suspect a problem, you could
return the unit to your dealer or Icon Audio for a
periodic service or return the valves for testing free of
charge. You should carefully remove the valves they
should be well packed in cardboard & foam or similar,
and returned to Icon Audio for testing. (Valves are
very rugged if packed properly).
Specification & Features
•
No printed circuit board or tag board
•
Choke regulated power supply
•
All Triode design
•
2x 6SN7 Double triode
•
Signal to noise level -90db
•
Freq response 10hz-30khz +0 - 0.1db
•
THD 0.01%, @ 1khz, 2v rms
•
Hand wired point to point components
•
High quality 2w metal film resistors, for audio
•
Blue LED mains indicator
•
Audio grade Polypropylene audio capacitors
•
Wired with silver PTFE audiophile cable
•
Rubicon/Nichichron power capacitors
•
Ceramic valve holders for minimum leakage
•
DC heater power supply for minimum noise.
•
Gold plated Input & output terminals
•
Gain= 0.94 or -0.6db
•
Output impedance 38 ohms
•
Maximum output 30 volts
•
230/240volts, 20W 1A anti-surge fuse
•
mains lead, (UK plug 5amp fused)
•
C E certified
•
SIZE and weight
connections & ventilation)
(Specifications subject to change, errors & omissions excepted 19/02/20)
icon Audio
351 Aylestone Road Leicester LE2 8TA
www.iconaudio.com
Ph +44 (0) 116 244 0593 +44 (0) 7787 158791
(figures in brackets allow for rear
(UK) Ltd
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