If voltages are NOT correct, then disconnect ‘Power Out’ cable from XT A00381 Termination
Board JP1 (as per below) and measure voltages at ‘Power Out’ JP12 again on XT A00380
Main CCU Board. Are voltages then ok? If not, then possible XT A00380 Main CCU Board.
If voltages are ok, then possible problem with XT A00381 Termination Board or the system
Network that is connected to it.
If voltages are ok from original readings on XT A00380 Main CCU Board, then check
voltages, with reference to 0v, on XT A00381 Main Termination Board at ‘Power Out ’
connection JP1 (as below), are voltages correct?
24v (Blue Cable) = 24-26v DC 12v (Brown Cable) = 12–13.75v DC
5v (Pink cable) = 5v
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