Fixing the transformer from Orange Terror Bass PSU ?

[Doobi]

Hello people,

I m an electronic repair hobbyist who learning more and more everyday. I enjoy putting myself in bad situation and the one following is the worst i had to deal with when it comes to electronic repair...

The last broken unit i purchased is a Terror Bass amplifier, the 500w version for around 70 euros. I knew it was for parts but i was not aware someone tried to fix it.. and it's a mess cauz the transformer from the PSU is (almost) missing in the unit, only the ferrite is left (good condition) and 2 turns of one of the windings... The rest is bad but fixable : bad power transistor cross reference put in place, awful soldering.... The main problem is this tranformer....

On internet, i can see the transformer is labeled TB500 from Yuyao Huachi... and luckily there is a schematic online for this amp..

I contacted Orange Amp with no answer yet... the product is out of warranty and buying the whole PSU would not make sense as it's over 500 euros so way too expensive.

I would like to know what you think about this ? Is it game over ? If im correct its a half bridge transformer with 2 primary and 3 secondary windings..

Im a bit stubborn and i love learning new things about electronics, i could go for building my own transformer but i think its far from being easy...

Thanks for your advices

[Jazz P Bass]

The power supply is of the 'Switch mode' type.
Yes, it is setup as a half bridge circuit.
Look up the datasheet for the driver ic.
I have never had the occasion to try to source a switch mode transformer.

[The Dude]

I have no info. BUT, you may want to add your location to your profile so that we know where you are and what line voltage you are looking for. You quoted prices in euros, but I hate to assume.

[g1]

buying the whole PSU would not make sense as it's over 500 euros so way too expensive.

Where did you get this price from? You said you have not heard back from Orange yet.
See what price they give you for the PSU and also ask what they would charge you to repair it if you send it to them.

[glebert]

I think that there are probably other problems other than the transformer, so I wouldn't spend $$$ trying to fix that part of it. I would be looking to see if you could get a drop in SMPS power amp/power supply to fit (something like a B&O Icepower). The hard part will be getting high voltage to run the preamp tubes, but you could do that on a small separate supply.

[clintronics]

Its 99.5% likely its not the transformer.

[Pixel]

Its 99.5% likely its not the transformer.

If you are going by the OP's picture, that is lifted from someone's blog. OP says their transformer is mostly missing.

[glebert]

If you are going by the OP's picture, that is lifted from someone's blog. OP says their transformer is mostly missing.

I think the reasoning is that the primary failure mode for a SMPS power supply/amp is likely going to be something other than the transformer. It's much more likely to be shorted out FETs, which may have then taken out the transformer as well.

[x-pro]

Self-assembly of a pulse transformer is quite possible. But for this purpose it is necessary to know the initial data well:
Power. Frequency of conversion. Voltages and currents of the secondary windings. Core parameters are very important!
Winding rule.
We can only wish you good luck!

[clintronics]

If you are going by the OP's picture, that is lifted from someone's blog. OP says their transformer is mostly missing.

Mostly? LOL if its missing its missing. But it was probably not bad in the first place.

[Pixel]

Mostly? LOL if its missing its missing. But it was probably not bad in the first place.

I'm just going by what the OP said. Apparently part of it is still in there.