O/T treadmill broken

[dogbower]

The wife’s treadmill has stopped working, as it weighs a ton, and nearly killed me getting it in the house, even in bits, I’d like to mend it.
I’ve had a poke around inside, and a transformer is making a clonk when power is turned on.
So with my in depth knowledge I have diagnosed that that’s what’s at fault.
However I have no knowledge as to what I’m looking for, the part number brings up no matches.
The sticker on it just confuses me.
So what am I looking for, any pointers as to where I might get one?





Thanks Stuart

[PeterK]

Whilst normally silent, a transformer can make a clunk as power energises the electromagnet and the metal plates inside shuffle together.

It is a 240v input, 120v 3 A output transformer. Before buying a replacement, check the output.

[dogbower]

Whilst normally silent, a transformer can make a clunk as power energises the electromagnet and the metal plates inside shuffle together.

It is a 240v input, 120v 3 A output transformer. Before buying a replacement, check the output.

Thanks, it just had me a bit confused with all the different voltages, 100,120,200,230, and 240?

[neilbardsley]

May I ask how can you check the output on a 100v AC? I'm not taking the p155 but I'm happy to put a multi meter on 12v DC but AC scares me

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[deano]

That spec of transformer is not going to be easily found, or cheap. Most will be 240 to 115 (there is one on RS components 500VA for £127.52 plus shipping probably). Might be time to trade her in

@Neil - AC (RMS) can be checked using any old or modern multimeter, set to ~AC. One ten is regarded as the lethal DC or RMS voltage so best left to a pro, but it is done by simply probing across the winding connections while turned on. Typically, we only do this to check that it is actually turned off

[Sam]

115v is near enough isn’t it? Would the motor blow up over such a small difference?

[PeterK]

That spec of transformer is not going to be easily found, or cheap. Most will be 240 to 115 (there is one on RS components 500VA for £127.52 plus shipping probably). Might be time to trade her in
:

Just to be clear - the wife or the treadmill

[Bruce M]

Doubt it’s the transformer. Did you measure the output? Has it blown the fuse?

I’d be more suspicious of any protection circuits like limit switches.

[neilbardsley]

That spec of transformer is not going to be easily found, or cheap. Most will be 240 to 115 (there is one on RS components 500VA for £127.52 plus shipping probably). Might be time to trade her in
:

Just to be clear - the wife or the treadmill

Similar pronoun but many thousands of pounds difference

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[RobFrost]

The wife’s treadmill has stopped working, as it weighs a ton, and nearly killed me getting it in the house, even in bits, I’d like to mend it.
I’ve had a poke around inside, and a transformer is making a clonk when power is turned on.
So with my in depth knowledge I have diagnosed that that’s what’s at fault.
However I have no knowledge as to what I’m looking for, the part number brings up no matches.
The sticker on it just confuses me.
So what am I looking for, any pointers as to where I might get one?

Thanks Stuart

See if you have a local REWINDS company. They typically rewind large, expensive, motors and generators but if you go there cap in hand and talk to the right person and get lucky they might do you a cheap favour for cash. E.g. these guys do transformer rewinds: https://www.rbaker.co.uk/services/singl ... nsformers/

[PeterK]

.... but before you do anything or spend any money, check whether the transformer is actually at fault. If you're not confident, find someone who is to check what (if any) output you have from the transformer. They don't often fail.

[RobFrost]

P.S. assuming you have a multimeter you need to identify which terminals are two ends of the same wire and determine whether any such pairs have infinite resistance between them. If broken, you will almost certainly find such a phenomenon.

A transformer is a big electromagnet and when you connect the power you charge it up with electromagnetism. This causes actual mechanical tension and compression within the transformer. The clunk is just the windings, core and case moving under this force so wouldn't normally be taken as an indication of a defect.

I haven't watched this but it probably shows how to test:
https://www.youtube.com/watch?v=D0OQvuux6CE

[dogbower]

Thanks for the replies, I’ve sourced a complete power unit including the transformer for £50!
If that doesn’t work it’s time for a new one, treadmill that is not the wife!

[Bootsy]

Thanks for the replies, I’ve sourced a complete power unit including the transformer for £50!
If that doesn’t work it’s time for a new one, treadmill that is not the wife!

Double bubble - trade the wife in too but it may cost you more than £50 for a replacement

[Sam]

Any pics? I might be interested if you do decide to get a new one.