OM POWER OM2000A+ Manual page 61

Plate voltage error
Grid voltage is low
Screen voltage error
Amplifier is too hot
HARD FAULT
Heating voltage error
Cooling error
Mains error
Factory reset
I the case of very abnormal behavior of OM2000A+ is possible to make factory reset. After that all the
parameters will be changed to the factory default values.
Press ON/OFF button, hold it and press Main switch. ON/OFF button hold pressed several seconds, until
next display will appear.
Check plate power supply
Check grid power supply
Check screen power supply
Check cooling system
Set up aditional blower
Check HV circuits and Tube
Set up properly transformer
voltage selector
Check blower rotation
Check mains voltage and set up
nominal mains voltage Set
up properly transformer voltage
selector
High voltage supply fault. Check fuses on HV board.
Low voltage on the grid. Check fuse F4 on SW ON board.
Check fuse F5 on HV supply board and fuse F1 on the
screen board.
Check the airflow (ventilation grid on the rear panel).
Cooling exhaust must be free – no obstacle within 15cm.
During long contest set additional blower ALLWAYS ON
(page 18).
Protection circuit saved HV against overload. I the case of
too high current from the HV supply the HARD FAULT
protection is activated and switched the PA automatically
OFF. Check HV circuits, blocking capacitors and the tube.
Usually is due to improper setting of the primary voltage on
the transformer (page 33). In normal condition Uf should be
9V +/- 0,5V.
Main blower lost the speed. Check its functionality.
This error may be caused by the improper setting of
the nominal value of Um. Check your AC mains
voltage and set it as nominal Um (page 21). Check
primary voltage setting on the transformer. This fault
may occurs also in the case of very "soft" mains, when
during transmitting AC voltage dropped down to very
low level.
If you are sure to make factory reset,
press YES. Type of supported TCVR and
frequency are visible on the display.
working
AUTO LED is ON.
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