Ault Power Supply 3 volts @ 5 amps one second on one off

[sam_sam_sam]

Re: Ault Power Supply 3 volts @ 5 amps one second on one off

check resistor SR9 on the bottom of the board.

Thank you for pointing me in the right place on this board

SR8 = 101 which should be 100 ohms reads a lot higher that in either direction
First thing I am going to do is replace this resistor

SR9 = 705 which should be 7 megohms it more like 11.34 k ohms in either direction
Take this one out and recheck it

SDZ1 if this one is a diode in one direction it reads .856 in the other direction
It reads 1.67 volts in diode test mode

If this is a resistor with a value of “0” it is not reading “0” ohms not even close kohms range

(it looks like there maybe another digit but the solder is in the way)

I will have to see if this component has a line or a dot on it ones I have taken it it out

If it turns out to be a resistor it get replaced with another “0” ohm resistor

All of these reading are all mess up

One other note

This was checked with a lab power supply with voltage and current control

Most of the the white LEDs are not working and the amperage is a little high in both direction

This should not be the case it should have current in one direction and none in the other direction at 3.3 volts
I will have to replace all of the LEDs in the flood lights

[stj]

Re: Ault Power Supply 3 volts @ 5 amps one second on one off

check resistor SR9 on the bottom of the board.

[sam_sam_sam]

This power supply run some white LEDs flood light in the front of my yard
This power supply has been in use for about 4 to 6 years until we had a bad thunderstorm which mess up a lot electronic devises which cost me about $1000
to replace

This power supply did not escape it vengefulness of that storm

I would like to try to fix it I can not find this size power supply in this foot print any more
It fits in a power supply box that was made by Malibu lighting company it nice and small with a photo cell all ready there

The problem with power supply is that it come ON for a second then goes OFF for a second and keeps repeating

The optic sensor was blown to pieces replace it and recap it except the main cap

Right next to main filtering cap there is a device that 4 pins but I can not read the numbers on it but I think that it must be the switching regularlator IC chip

I have another switching power supply that is the same exact model that works fine I can read the numbers on that if I take out filtering cap again which I can do

Any one have any ideas where to start