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One special fuse, filled with sand, is used in the model OM2501A. 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.
7.
APPENDIX
7.1.
Primary AC voltage selection
Primary section of the HV transformer is switchable for three values of AC voltage (220, 230, 240V)
Factory settings is 230VAC. Before first starting the PA we recommend checking that the correct
value is selected according to the AC voltage in your network.
Type of supported TCVR and working
frequency are visible on the display.
AUTO LED is ON.
