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Side view on the opened OM2501HF (OM3501HF)
HV supply board
AC Selector
SW ON board
HV Transformers
Remove the upper lid first. On the right side of the PA, there are two PCBs mounted. On the right upper
side is Switch ON board where AC selector is located.
There are AC selector for each transformer.
The blue wire – one side of primary winding
is conected to N pole. Wire marked with
proper voltage connect to L pole.
AC voltage is marked at every black terminals.
AC selector range can be changed according to the
specific conditions in individual countries. Default
settings is 220, 230, 240V / 50Hz for EU market
and 230, 240, 250v / 60Hz for USA market. If you
need different settings in the range of 200 – 260V,
this should be specified in the order!
Manufacturer reserves the right to make future changes in the way of connecting the transformer to the
board. Allways mark the position of the terminals before disconnecting the transformer.
Type of supported TCVR and working
frequency are visible on the display.
AUTO LED is ON.
