Author Topic: Differential Reciever board blows fuses  (Read 616 times)

Offline ThinkAgainAgain

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Differential Reciever board blows fuses
« on: November 29, 2017, 04:48:12 PM »
Hi All, Im in a bind.

I have an F4 white Differential receiver that pops fuses no matter what. Is there testing points or a way to overnight two boards? Thanks for any help!


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Offline ThinkAgainAgain

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Re: Differential Reciever board blows fuses
« Reply #1 on: November 29, 2017, 06:01:12 PM »
Hi All, Im in a bind.

I have an F4 white Differential receiver that pops fuses no matter what. Is there testing points or a way to overnight two boards? Thanks for any help!


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It appears to only blow fuses when a string of lights are plugged in.  But, it will blow any of the 4 ports.

Ive had this particular prop working on a different receiver board so I know its wired properly.


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Offline JonB256

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Re: Differential Reciever board blows fuses
« Reply #2 on: November 29, 2017, 06:31:50 PM »
Does it blow a fuse when the plug is inserted but with no wires attached?

There are four 5 amp fuses. It blows all of them or just the one associated with a socket?

Does it blow fuses if there is no CAT5 cable attached to give it a signal?

What really puzzles me is that it doesn't blow fuses with nothing plugged in.

Time for a picture (no power attached but with your four strings plugged into their sockets)

Offline ThinkAgainAgain

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Re: Differential Reciever board blows fuses
« Reply #3 on: November 29, 2017, 08:24:44 PM »
Does it blow a fuse when the plug is inserted but with no wires attached?

There are four 5 amp fuses. It blows all of them or just the one associated with a socket?

Does it blow fuses if there is no CAT5 cable attached to give it a signal?

What really puzzles me is that it doesn't blow fuses with nothing plugged in.

Time for a picture (no power attached but with your four strings plugged into their sockets)
So I tried a few things.

It blows fuses with no cat 5 hooked up. - just power and pixels.

All ports are effected...

It does not blow the fuse with just power hooked up,... only when pixels are plugged in


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Offline ThinkAgainAgain

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Re: Differential Reciever board blows fuses
« Reply #4 on: November 29, 2017, 08:26:06 PM »
Does it blow a fuse when the plug is inserted but with no wires attached?

There are four 5 amp fuses. It blows all of them or just the one associated with a socket?

Does it blow fuses if there is no CAT5 cable attached to give it a signal?

What really puzzles me is that it doesn't blow fuses with nothing plugged in.

Time for a picture (no power attached but with your four strings plugged into their sockets)
So I tried a few things.

It blows fuses with no cat 5 hooked up. - just power and pixels.

All ports are effected...

It does not blow the fuse with just power hooked up,... only when pixels are plugged in


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I did not check to see if All fuses would blow with just one port connected.


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Offline JonB256

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Re: Differential Reciever board blows fuses
« Reply #5 on: November 29, 2017, 08:31:25 PM »

Ive had this particular prop working on a different receiver board so I know its wired properly.


This is the part that baffles me. It "has to be" the pixel string causing the fuse to blow but you say it works on another board.

Is it the same manufacturer receiver board (Falcon)??  If different, check the orientation (Ground, Clock, Data, Power) of the wires between both.
On the Falcon receiver boards, the Clock line is not connected to anything.

This is why I asked for pictures. And you didn't put 2 amp fuses in instead of 5 amp, did you?  A 5 and a 2 look similar.

Offline ThinkAgainAgain

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Re: Differential Reciever board blows fuses
« Reply #6 on: November 29, 2017, 08:49:15 PM »

Ive had this particular prop working on a different receiver board so I know its wired properly.


This is the part that baffles me. It "has to be" the pixel string causing the fuse to blow but you say it works on another board.

Is it the same manufacturer receiver board (Falcon)??  If different, check the orientation (Ground, Clock, Data, Power) of the wires between both.
On the Falcon receiver boards, the Clock line is not connected to anything.

This is why I asked for pictures. And you didn't put 2 amp fuses in instead of 5 amp, did you?  A 5 and a 2 look similar.

I have 3 other receiver boards that are working fine. Just seem to be having difficulties with this one. Id use one of my e682s but I have several large runs on this prop and need the ability to have the larger pixel counts... and plus, its wired for this board.





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Offline ThinkAgainAgain

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Re: Differential Reciever board blows fuses
« Reply #7 on: November 29, 2017, 08:51:19 PM »

Ive had this particular prop working on a different receiver board so I know its wired properly.


This is the part that baffles me. It "has to be" the pixel string causing the fuse to blow but you say it works on another board.

Is it the same manufacturer receiver board (Falcon)??  If different, check the orientation (Ground, Clock, Data, Power) of the wires between both.
On the Falcon receiver boards, the Clock line is not connected to anything.

This is why I asked for pictures. And you didn't put 2 amp fuses in instead of 5 amp, did you?  A 5 and a 2 look similar.

I have 3 other receiver boards that are working fine. Just seem to be having difficulties with this one. Id use one of my e682s but I have several large runs on this prop and need the ability to have the larger pixel counts... and plus, its wired for this board.





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When I looked at the board earlier, I didnt notice any solder bridges or any signs of manufacturing flaws.


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Offline JonB256

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Re: Differential Reciever board blows fuses
« Reply #8 on: November 29, 2017, 09:12:44 PM »
Looking at my own Diff Receiver boards, I'm baffled by your symptoms.

It is remotely possible that one or more of the surface mount resistors is a drastically wrong value.
There are four of them and they should all clearly show "1000" on them (1 Kohm) and that is directly on the Data line.

and in one of your pictures, there is a Red and Black wire sticking up in the air (looks like Power and Ground) dangerously close to each other. What is that about?

Offline CaptainMurdoch

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Re: Differential Reciever board blows fuses
« Reply #9 on: November 29, 2017, 09:20:45 PM »
Have you tested your pigtail  attached to the differential receiver board to make sure there isn't an internal short inside it?  I'm sure most of us have seen the odd one with crossed or mixed up wires so it is something to check.
-
Chris

Offline ThinkAgainAgain

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Re: Differential Reciever board blows fuses
« Reply #10 on: November 29, 2017, 10:14:02 PM »
So, the red/black power wires do look bad in the photo. They are just pulled apart to isolate the receiver board... those go to power distribution boards.

Ive tried different pigtails from another prop, and same thing. Ive also tried different power supplies.

Does David overnight stuff? Or do I have to wait the 3 days for FedEx :/


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