Laboga Mr.Hector User Manual page 12

7. Anode fuse
Slo Blo anode fuse T1,6A.
HINT: If you blow the fuse, the
amplifier doesn't work. However, you
can still change channels, LED diodes
are lit and tubes glow.
ATTENTION! Before you
exchange the fuse, always
unplug the amplifier from the
power outlet and wait for at
least one minute.
ATTENTION! Always
exchange the fuse for one of
the same value.
8. Main fuse integrated with power
supply socket
HINT: Remove the power cord during a
storm or when the amp is not used for
a longer period of time.
HINT: While changing the fuse , make
sure the blades of the fuse are properly
installed.
ATTENTION! Before you
change the fuse, always
unplug the amplifier from the
power outlet and wait for at
least one minute.
ATTENTION! Always
exchange the fuse for one of
the same value.
A Slo Blo T2,5A fuse is
integrated in the
power supply socket.
One spare fuse
included.
9. Power tubes symmetry
ONLY FOR ADVANCED USERS
A symmetry potentiometer of power
tubes is used to minimize the
differences in parameters of power
tubes, which should work as a quartet
(all four tubes have the same
parameters). You will have access to it
if you unscrew the rear grate, which
secures power tubes. Be careful, hot
tubes may cause burning when you
touch them
If tubes are not matched in a quartet,
or, if, after some time of usage, you
can hear hum in the speakers (even
after turning the Master down), you
can get rid of it by adjusting the tube
symmetry potentiometer until the hum
is gone. You should avoid extreme
potentiometer positions by all means -
if the hum fades only in one of the
extreme
tubes have inconsistent parameters,
which may cause tube or amplifier
damage.
is
settings, it indicates
ATTENTION! Always observe
then power tubes carefully
(with the amplifier on) to check
if any of them are glowing in
an unusual way before you
adjust the symmetry. If in any
tube's outer metal cover
(anode) glows red, you have to
urgently turn the amplifier off
and contact authorized Laboga
service personnel or any
Laboga retailer.
ATTENTION! Avoid using this
potentiometer if you are
unsure about its function or do
not understand what harm it
may cause when you use the
tubes with mismatched
parameters.
that
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