Behringer Musical Instrument Amplifier 333 Manual Do Utilizador
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Control elements
7
Footswitch
Footswitch BUGERA FSB104
The 7-pin
36
DIN connector is provided to connect
the footswitch cable (included). Then, the cable is
connected to the FOOTSW(itch) connector of the
BUGERA amplifier. Be sure to make a connection
before switching on the amplifier.
The
37
CLEAN switch activates the CLEAN channel. Its
LED illuminates when the channel is active.
The
38
CRUNCH switch activates the CRUNCH chan-
nel. Its LED illuminates when the channel is active.
The
39
LEAD switch activates the LEAD channel. Its
LED illuminates when the channel is active.
The
40
FX LOOP switch activates the FX LOOP and the
BOOST function. Its LED illuminates when the FX
LOOP is active.
Inside the BUGERA
DANGER!
*
High voltage! Risk of death!
High voltages of up to 500 V DC may be
present inside the casing for long periods
after being disconnected from the mains.
To avoid lethal electric shock, do not open
the casing. There are no user-serviceable
components inside. Refer all maintenance
to qualified service personnel. Remove the
mains cable when the unit is not in use.
The parts inside the amplifier operate at
*
high voltages and high temperatures. To
avoid damage and injury that results from
fire or electric shock, do not drop or spill
anything into the unit’s casing.
Instructions for qualified service
personnel only
Remove the backside of the amplifier’s casing to get to
the valves and the control elements.
These are the sockets for the
41
12AX7A/B/C pre-
amp valves.
These are the sockets for the
42
6L6 and EL34 power
amp valves. Please take care that the BIAS SELECT-
switch (43) is set correctly. The models 333 and
333-212 are supplied with 6L6GC power amp valves
when it leaves the factory. The models 333XL and
333XL-212 incorporate EL34 power amp valves.
The
43
BIAS SELECT switch allows the amplifier to
optimally adapt to the used valves (6L6 or EL34).
*
The
44
BIAS TEST connector lets you connect a volt-
meter in order to measure the power amp valves
(bias adjustment). Make sure that the voltmeter is
set to direct current (DC).
The
45
BIAS ADJUST control is used to make the bi-
as-adjustment.
Replacing the power amp valves also requires
$
bias adjustment. You should always use sets
of four matched valves. The valves of the
BUGERA Series are ideal for this purpose.
Inside the BUGERA 333