Can anyone please help me, the power supply tics and I tried to find out why, the final transistor is ok and when I toke it out the power supply was still ticking, I tock out each diode from the power supply to find out which circuit is the problem, this worked but because the components are to close I cannot find what circuit it is,
If you have any ideas or no what the problem may be.
Or if you have the schematic from this monitor, that will also help me.
Thank you,
Cornel
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Because if the fault was on a rail that the feedback for the power supply is on then the voltage would go sky high when you removed the diode until some other device failed. This would happen in less than 1 second of power up. You can not remove the diodes on the secondary of a switching power supply to fault find unless the regulation is taken from the primary side.
If you are lucky your power supply will have the regulation on the primary side and taking the diodes out will not have caused more damage.
This unit may have seperate EHT and Line scan circuits so you may find 2 large switching transistors.
CTX's of this period suffered with FBT failure.
Rich
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Yes only a capacitor was destroyed, I knew what could happen but I didn't have any other choice.
If the FT from the FTB is not on the board this should stop the supply from ticking if the FTB or the transistor are faulty.
cornel
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