Outback Radian 8048 Part Needed

Hello

I am looking for a power supply for an Outback Radian 8048 inverter. This power supply has been discontinued by outback some time ago and is super hard to find.
I thought I would post here to see if anybody had a spare or knows where to find a spare. Very hard to find one.

The part is the Outback Power Beast Power Supply Board Part # 201-0031-01-00.

Thanks
Jeff

I hope you had some luck finding this.

@Dutchboy69 Have you had any luck with finding a replacement? I have the exact same problem and have been hitting nothing but dead ends. I have determined that the problem seems to be the resistor at R19, but since it's burned I can't see the number on top of the resistor. If anyone has a GS8048 inverter and can identify the number on top of the resistor at R19, it would be very much appreciated! Thanks!

aclark9 said:

@Dutchboy69 Have you had any luck with finding a replacement? I have the exact same problem and have been hitting nothing but dead ends. I have determined that the problem seems to be the resistor at R19, but since it's burned I can't see the number on top of the resistor. If anyone has a GS8048 inverter and can identify the number on top of the resistor at R19, it would be very much appreciated! Thanks!

Click to expand...

I have one. I'll try to remember to look at it.

@SparkyJJO That would be so great! I have contacted Outback to see if they could give it to me, but so far no reply. Thanks!

Just reposting to see if anyone can identify the number on the resistor at R19 on the GS8048 inverter. Thanks!

I have not gotten to my Radian yet. Sorry. I might not be able to very quickly.

SparkyJJO said:

I have not gotten to my Radian yet. Sorry. I might not be able to very quickly.

Click to expand...

No worries, I appreciate you even trying. I'm just trying to put it out there to see if anyone can help. thanks.

Hello @SparkyJJO
Just wondering if you were able to see the part number for the resistor R19? My 8048 has the same issue and I was able to look at a 4048A power board to see R19 on that board is a 2210, not sure if I want to proceed based on that info but hey, the 8048 is not working now so...

thanks for any help
Bruce

I also have a working 8048 from 2013(not the A model).
Just took a picture and verified with a meter, it is a 210 ohm resistor.

Hello Brightside, thanks for picture. I was able to order 221 ohm resister and installed at R19. However, no love. when I energized the 8048 R19 heated up,smoked and the solder melted dropping the resister of the board so I'm guessing there is more to the Radian R19 story than I want to follow up

Bruce

I agree, there is more to the story. At least now you know.

U2 is a TL3843B PWM Controller. R19 goes to pin 3 which is Current Sense. This pin during normal operation should be between 0-1V and shutdown from 1.1-5.5V.

This is sensing off the string of 10 1ohm resistors ending in R31, so it's a 0.1 ohm shunt.

To melt R19 a 220 ohm resistor off the board, you probably need 10V or more across it. Cant be too much V or the resistor would burn open ckt, so it has to be low enough heat it not fry it. So there wold have to be 100A through the shunt, but this should melt the shunt resistors as that would be 10W each. Seeing the R19 feeds the I sense pin, this should be high impedance. So Q6(probably a bipolar) or C31 could be shorted if they return to the ground reference, or U2 could be bad as well.

Or maybe more likely the board underneath has an open in the circuit from the 0.1 ohm shunt array as it looks like this feeds the header to the board below. If that ckt was open then the full voltage would be across R19, and take out U2 and Q6 first.

Who knows, you could apply 1V with a power supply with the current limited to U2 pin 3 and use a thermal camera to see what components heat up. Or measure with a meter in diode or resistance settings.