Footswitch; Inside The Bugera; Footswitch View - Bugera 333XL User Manual

Footswitch

Footswitch BUGERA FSB104
36 The 7-pin 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.
37 The CLEAN switch activates the CLEAN channel. Its
LED illuminates when the channel is active.
38 The CRUNCH switch activates the CRUNCH channel.
Its LED illuminates when the channel is active.
39 The LEAD switch activates the LEAD channel. Its LED
illuminates when the channel is active.
40 The FX LOOP switch activates the FX LOOP and the
BOOST function. Its LED illuminates when the
FX LOOP is active.

Inside the BUGERA 333

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.
Remove the backside of the amplifier's casing to get to
the valves and the control elements.
41 These are the sockets for the 12AX7A/B/C preamp
valves.
42 These are the sockets for the 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.
43 The BIAS SELECT switch allows the amplifier to
optimally adapt to the used valves (6L6 or EL34).
44 The BIAS TEST connector lets you connect a
voltmeter in order to measure the power amp valves
(bias adjustment). Make sure that the voltmeter is
set to direct current (DC).
45 The BIAS ADJUST control is used to make the bias-
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.
CAUTION: WE HIGHLY RECOMMEND THAT BIAS
ADJUSTMENTS
QUALIFIED PERSONNEL!
Control elements
BE CARRIED OUT BY
7
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