Inside The Bugera - Bugera 6262 User Manual

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.
32 These are the sockets for the 12AX7A/B/C preamp
valves.
33 These are the sockets for the 6L6 and EL34 power
amp valves. Please take care that the BIAS SELECT
switch (34) is set correctly. The BUGERA amp is
supplied with 6L6GC power amp valves when it leaves
the factory.
34 The BIAS SELECT switch allows the amplifier to
optimally adapt to the used valves (6L6 or EL34).
35 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).
36 The BIAS ADJUST control is used to make the bias-
adjustment.
Inside the BUGERA 6260
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 BE CARRIED OUT BY QUALIFIED
PERSONNEL!
Control elements
en
7