39 16021730 Rev. 0
Check for line voltage inputs and outputs per label on top of the power supply.
1. LINE INPUT
With main power switch ON check for line input on input terminal.
2. DC OUTPUT
Check for +12VDC and +26VDC output on output terminal.
Check for +12VDC on main control terminals JP11-3,2
Check for +26VDC on main control terminals JP11-3,1
If voltage is Pulsing in a repetitious manner there is probably an overload condition on the output side
of the power supply.
Remove JP7
If Pulsing persists test JP7 harness for short circuits (JP7-15, & JP7-15,16)
If Pulsing stops remove JP11.
If Pulsing persusts replace power supply.
If Pulsing stops replace main control.
POWER SUPPLY DIAGNOSTICS