Voodoo labs pedal power 2?

[jmaf]

Does the little fuse is like a standard fuse? like you can test the continuity between his legs? Because I opened the transformer and nothing pass between his legs.

Yep. Regular fuse.

So it's blown. In my case the fuse didn't save the transformer but I hope you have better luck.

[visualdistortion]

Transforme die... so bad, need a new one. Thanks for your help.

[jmaf]

Transforme die... so bad, need a new one. Thanks for your help.

These things need to be redesigned with smaller fuses not hidden in the transformer.

[Helmholtz]

These things need to be redesigned with smaller fuses not hidden in the transformer.

Fuses buried in transformers are typically thermal fuses. These are triggered by over-temperature not over-current. That's why they need to be in thermal contact with the winding(s). Using a normal fuse instead would be kind of cheating regarding safety standards.

[The Dude]

If I'm not mistaken, power transformers need to have a thermal fuse to be UL listed.

[jmaf]

If I'm not mistaken, power transformers need to have a thermal fuse to be UL listed.

How come most transformers in consumer devices don't have a thermal fuse then?

Fuses buried in transformers are typically thermal fuses. These are triggered by over-temperature not over-current. That's why they need to be in thermal contact with the winding(s). Using a normal fuse instead would be kind of cheating regarding safety standards.

I've never seen a guitar pedal catch fire.

These things need a fuse to save the complex and expensive transformer inside them. I don't care where they put the fuse.

[J M Fahey]

Does the little fuse is like a standard fuse? like you can test the continuity between his legs? Because I opened the transformer and nothing pass between his legs.

Please post a picture of the original fuse, I very much doubt it´s a conventional fuse.

Usual *inside* transformers is a *thermal* fuse, a very different thing.

Thermal fuse:



or:

[jmaf]

visualdistortion asked if he could test the fuse like he'd test a regular fuse, I hurriedly said yes ["you can test as"] regular fuse.

That's all, I was just trying to help. I know where this is going and I have zero patience for this.

[visualdistortion]

So on mine, after testing, the problem was on the primary of the transformer and the fuse was "blown". So I'm actually discussing with VL to get a new one. By the way do you think it's possible to add a Fuse in the AC input? Like drill the box and and put a fuse holder, maybe it can prevent from blowing more.

[jmaf]

So on mine, after testing, the problem was on the primary of the transformer and the fuse was "blown". So I'm actually discussing with VL to get a new one. By the way do you think it's possible to add a Fuse in the AC input? Like drill the box and and put a fuse holder, maybe it can prevent from blowing more.

I'd surely tell my clients to mod these and add a mains fuse. Could use an axial wired fuse holder, from the mains socket, without having to drill the case.

[Radarwaz]

I have been having a heck of a time trying to locate the issue with my PP2+
I'm certain that my transformer fuse has blown.

Unfortunately in my case, in the process of trouble-shooting I created another headache for myself.
I removed the two TO-252 surface-mount packaged components without correctly documenting what they were!

I am sure that at least one of them was a voltage regulator (maybe a 317) or a 311 perhaps..
Is a fellow PP2+ owner able to tell me what is written on these two components - as well as which one goes where?

Many thanks in advance, Waz in Perth.

[jmaf]

I have been having a heck of a time trying to locate the issue with my PP2+
I'm certain that my transformer fuse has blown.

Unfortunately in my case, in the process of trouble-shooting I created another headache for myself.
I removed the two TO-252 surface-mount packaged components without correctly documenting what they were!

I am sure that at least one of them was a voltage regulator (maybe a 317) or a 311 perhaps..
Is a fellow PP2+ owner able to tell me what is written on these two components - as well as which one goes where?

Many thanks in advance, Waz in Perth.

IC5 and IC6 are both LM317

[Radarwaz]

IC5 and IC6 are both LM317

Amazing. Thank-you!!

[spunko]

Hello, I'm sorry to revive this old thread, but I came across this exact same problem.
This is a picture of the fuse. The print has faded a little but it read as follows:

AUPO
A4-F JET
130ºC x3
2A 250V

The problem is I can't get the same fuse, so I was thinking on installing an axial wired fuse as suggested, but don't know what value would be safe. I know the original is a thermal fuse, and I will install a fast blow fuse.
Is 1A-250V good?

[jmaf]

Hello, I'm sorry to revive this old thread, but I came across this exact same problem.
This is a picture of the fuse. The print has faded a little but it read as follows:
[ATTACH=CONFIG]55081[/ATTACH]

AUPO
A4-F JET
130ºC x3
2A 250V

The problem is I can't get the same fuse, so I was thinking on installing an axial wired fuse as suggested, but don't know what value would be safe. I know the original is a thermal fuse, and I will install a fast blow fuse.
Is 1A-250V good?

For the 230VAC model a 250mA mains fuse will do. Note that the aux power outlet is not fused, it's a direct tap from mains.

Was your transformer good after you removed the blown fuse?