Page 3
IMPORTANT READ THESE NOTES THROUGH FIRST!
2 QUICK SET UP GUIDE
1 Unpack unit carefully
. Make sure that it is in
good condition. If not report to Icon Audio. It is
important that you keep the packaging for
warranty/service return.
2 If Necessary fit the valves, or check that they
are firmly in place.
SEE NEXT PAGE.
The
KT90s should be fitted first to the two
REAR
sockets
(the
two
sockets
nearest
the
transformers). To avoid damage to the valves hold
the valves as close to the base as possible
NOTE THE “LEFT” and “RIGHT” KT90
orientation on each amplifier. Also keep the
left and right amplifier valves separate.
Be careful to note the correct orientation of
the central “spigot” between the pins
otherwise damage could occur.
The small valves should be gently pushed into
place. The 6SL7 (6188) is fitted to the right hand
base (the same side as the triode switch) and the
6SN7 to the left hand base (the same side as the
standby switch).
NOTE: The KT90s and 6SL7/6SN7 are NOT
interchangeable! This will result in damage
and could be dangerous.
3 Connect to source unit
, e.g. Phono pre amp,
Passive pre amp etc via appropriate phono
sockets.
4 Connect to speakers
Make sure to make the
correct polarity of speaker cables. (See speaker
connections chapter). If ‘bi-wiring’ both ‘common’
should go to the bla
ck terminal, and both ‘positive’
(or red) should go to the red terminals.
5 Connect to mains
supply using supplied IEC
mains lead to 240v supply.
If for some reason
the welded plug must be removed, please
remove plug fuse and dispose of immediately.
(As they can be a danger to children if plugged
in). The replacement plug should be wired in the
following way Brown to Live terminal, Blue to
Neutral terminal and Green/Yellow to Earth
terminal.
6 Before switching on make sure that the
“standby switch” is in the “up” position.
SWITCH ON!
The blue mains indicator should
light up. Leave for at least 60 seconds for the
valves to warm up, and then
push the “standby”
switch into the “down” position. The amplifier
should now be working. All valves should have a
visible orange glow from the cathode heaters.
With the pre amp volume control set to minimum
there should be no sound coming from the
speakers except a barely discernable gentle hum.
If there are any unpleasant sounds coming from
the speakers, switch off and
refer to the ‘Trouble
Shooting’ section or contact Icon Audio.
If your unit is fitted with the HT delay timer,
operation will begin after the unit switches the HT
on (approx 1 to 2 mins). You may hear very low
distorted sound from the speakers during the
warm up time. This is because there is virtually no
HT to operate the amplifier. We suggest you
reduce the volume until the HT cuts in.
6a Integrated/Power Amplifier Switch
Located on the rear LH side this switch is normally
“UP” for integrated operation (high sensitivity). If
use with a pre-amplifier is required, the switch
should be “DOWN” in the low sensitivity position.
7 Your unit should now be functioning
. If not
check wiring again. Do not operate at a high
volume for the first five minutes to allow the valves
to warm up properly.
Please note all these things are normal for
valve amplifiers:
A, Valves can get very hot, BEWARE!
B, The transformer cover will get quite warm
C, The amplifier may smell for a few weeks.
D, M
obile phone ‘breakthrough’ is normal.
E, Valves may make a ‘tinkling’ sound when
warming up and cooling down.
F, One channel may come on before the other at
switch on.
G,
There may be a ‘click’ when switching off.
8 Health and Safety
. The valves when operating
have high surface temperatures. Keep out of
reach of children and pets. The use of the
supplied guard is recommended in these
circumstances. Always unplug when making
adjustments.
Like all amplifiers there are
potentially lethal high voltages inside (over
600v DC), which when switched off can take
twenty minutes to discharge!
Do not remove
bottom panel unless you are a competent
engineer. There are no user serviceable parts
inside.
Like
other
household
electrical
appliances do not leave unattended whilst
switched on.
Do not adjust the KT90 bias pre
sets without reference to the manual. Incorrect
adjustment could cause the valves to overheat,
with resulting
in damage to valves and
amplifier.
To maintain the best performance of the
amplifier you should check the bias of the
output valves from time to time (say twice a
year). Full details will be found in section 6.
