Ok picked this unit up; guy said when he got it did this; it would turn on and start up run 30 seconds or so then the screen will fade out...
Va and Vs are to spec and do NOT fade; however the guy said he changed a couple caps on the Sub-power board; this is where he found 2 swollen caps but that didnt fix the issue... I have it now and have found several shorted diodes -removed from board- the issue with this sub-board is that across the 16v line it give off a -72.x Volts; yes negative voltage, even with the shorted diodes out it still gives the neg volts on the 16v line...
I know this unit can be fixed for the fact that it powers up and works fine for a moment... Im waiting on a better multi-meter -protek 608- so i can test the higher range caps... anyways any ideas on what could be drawing so much..?
Va and Vs are to spec and do NOT fade; however the guy said he changed a couple caps on the Sub-power board; this is where he found 2 swollen caps but that didnt fix the issue... I have it now and have found several shorted diodes -removed from board- the issue with this sub-board is that across the 16v line it give off a -72.x Volts; yes negative voltage, even with the shorted diodes out it still gives the neg volts on the 16v line...
I know this unit can be fixed for the fact that it powers up and works fine for a moment... Im waiting on a better multi-meter -protek 608- so i can test the higher range caps... anyways any ideas on what could be drawing so much..?
Attached Files