Fuse Replacement; Tube Replacement; Cleaning; Appendix - OM POWER OM2000A+ Manual

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
person! Internal fuses are located mainly on the SWITCH-on board (next to the HV transformer).
6.3.

Tube Replacement

In the case of vacuum tube damaging, contact the manufacturer or your dealer for ordering new one. You will get
instructuions how to change it. Exchange can be carried out only by professionally qualified person! After tube
replacing automatic BIAS adjustment must be done.
6.4.

Cleaning

To prevent damage to amplifier surface and plastic components do not use aggressive chemicals for cleaning. Do
not open the amplifier for cleaning. Outer surface may be safely accomplished by using 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), resp. 230,
240, 250V for US models. Factory settings is 230VAC. Before first starting of the PA we recommend to check the
correct value according to the AC voltage in your network. Change the settings, if necessary. The correctness of
the selected network voltage indicates Uf voltage, which must be in the range 8.5 – 9.5V. If it is lower, change the
digression down and vice versa.
One
special fuse filled with sand is used in the model
OM2000A+. In the case of an accidental discharges in the
tube this fuse (4 Amps fast, filled with sand) saves HV
supply circuits.
Type of supported TCVR and working
Fuse
frequency are visible on the display.
AUTO LED is ON.
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