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6.2.
Fuse Replacement
The user is allowed to change mains fuses (6.3 x 32mm), accessible from the rear panel, only. In the case
of fuse (fuses) interruption inside the power amplifier,
exchange can be carried out only by
professionally qualified persons!
Internal fuses are located mainly on the SWITCH-on board (next to
the HV transformer).
One special fuse, filled with sand, is used in the model OM40001HF.
In the case of an accidental discharges or short within the tube this
fuse (4 Amps fast, filled with sand) saves the HV supply circuits.
Fuse F 4A
6.3.
Tube Replacement
In the case of a damaged vacuum tube , contact the manufacturer or your dealer for ordering a new
one. We will provide instructuions for replacing the tube.
Replacement should be done by a
professionally qualified person!
After tube replacement the
automatic BIAS adjustment
procedure
must be done.
6.4.
Cleaning
To prevent damage to the amplifier surface and plastic components, do not use aggressive chemicals for
cleaning. Do not open the amplifier for cleaning. Outer surface cleaning may be safely accomplished by
using a piece of soft cotton cloth moistured with clean water or window cleaner.
Type of supported TCVR and working
frequency are visible on the display.
AUTO LED is ON.
