Komet 19 Owner's Manual page 11

Mains Fuse - blowing
"
Unplug amplifier from the wall AC. Remove the power tubes
new 2 Amp slow blow
"
on
(with no power tubes in the sockets)
Should the mains fuse continue to "blow", your amp will need to be serviced. If the fuse does
not blow , and the amp lights up, turn amp off, and install a new set of matched EL84 power
" "
tubes. Turn the amp back on. If the fuse does not blow, play the amp and monitor.
Amp Lights Up - No Sound:
Check the speaker connection at back of amp and at the input of the speaker cabinet. Bypass all
pedals and effects and plug your guitar into only the amplifier. Check the guitar cable and / or
try another guitar.
Check the power and the pre amp tubes and make sure that they are installed correctly and that
the filaments within each tube are lit.
but be defective in not passing signal. This is rare, but can occur.
the filaments lit) -
Check / test / replace - the H.T. fuse for continuity with a digital Ohm meter. It may be blown.
Amp is making a Humming
"
This is most likely a bad pre amp tube. Pre amp tubes can develop problems over their life span.
They may be operating flawlessly, and they may also test fine on a tube tester, but for what
appears like for no reason, can suddenly begin to make a
can begin to feedback or have microphonic or
ECC 83, 12AX7, 7025, and CV4004)
background hum, often mistaken for a problematic filter cap. Filament
more common with new, modern available pre amp tubes. Unfortunately, you will most likely
have to replace one of more of your pre amp tubes with any of these problems. This is another
reason we stress purchasing n.o.s. tubes - they are less likely to
Fluorescent and neon lights, rheostat wall dimmers, and some appliances may cause your amp
to contain a hum or
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for a guitar cable can also create a
Over time, the input jack may occasionally make a
instrument cable from the front panel of your amp. This is usually due to a dust / contaminate
build up on the input jack's ground shunt. This would require that the inside of the input jack be
cleaned professionally. We recommend using
Copyright 1999-2017, KometAmplification. Group, L.L.C. May not be reproduced in any form without express written consent from KometAmplification.
:
"
fuse
" (1 Amp "slow blow" 240V)
.
sometimes audio tubes can look operational
Note:
, Hissing , Feedback
" " " "
, or develop filament
buzz sound. An internally shorted guitar cable or using a speaker cable
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buzz sound through your amp.
" "
(see precautions section)
. Plug into the wall AC and turn the amp
or Crackling
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hissing or a
" "
ringing symptoms.
" "
humming
" "
go bad
"
crackle sound when you extract your
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G5.
DeoxIT Gold
®
. Install a
- (with
- sound:
"
crackling sound. They
" "
(See previous section titled:
- which is a low
humming is much
" "
.
"