Spot the deliberate mistake |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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Posted: 13 October 2023 at 12:25pm |
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Kevin
North Staffordshire |
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
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Can’t wait… love a pot-noodle pic!!
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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Yes you have it but you'll have to wait til lunchtime for the overhead view of my lunch.
Each psu had 2 6mm holes and pop rivets. The rivets went stright through the board in both places, one through the neutral mains track and the other through the IGBT feed to the switching transformer. Circuit totally obliterated. Amused they did it twice, an easy way to waste £400 |
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Kevin
North Staffordshire |
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
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Looks like they have drilled the case and used pop-rivets, and not the M3/M4 fixing locations provided by Meanwell
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MattStolton
Old Croc Joined: 04 September 2010 Location: Walthamstow Status: Offline Points: 4234 |
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Under the screw terminals looks to be a 110/230V slider switch? Something in red?
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Matt Stolton - Technical Director (!!!) - Wilding Sound Ltd
"Sparkius metiretur vestra" - "Meter Your Mains" |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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not exactly.
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Kevin
North Staffordshire |
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simonp1100
Young Croc Joined: 01 September 2008 Location: Bristol Status: Offline Points: 1103 |
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Could it be that the customer is using long fixing screws to attached the power supply to a base and the screws are hitting the PCB board inside ?.
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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Haven't had one of these for a while so as it's a Friday...
Not specifically speaker related but a ubiquitous Meanwell 600W power supply. Client installed one in his enclosure and it went bang. Bought another and installed that, it went bang too. Very unusual as Meanwell are a pretty decent product in my experience. A photo of my recently made pot noodle for the correct guess. |
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Kevin
North Staffordshire |
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Lucasdude
Young Croc Joined: 16 March 2013 Location: London Status: Offline Points: 787 |
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Didn't we cover this "wrap around the pole" termination technique last year?
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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Can't blame the chinese this time as they're made in the UK. I suppose the girl wiring it could've had something on her mind, although you'd think QC would've picked it up. At least it wasn't an earth.
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Kevin
North Staffordshire |
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MattStolton
Old Croc Joined: 04 September 2010 Location: Walthamstow Status: Offline Points: 4234 |
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I like my solder joints, like I like my Martinis, "Dry".
However, that isn't just "dry", more "absent"?
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Matt Stolton - Technical Director (!!!) - Wilding Sound Ltd
"Sparkius metiretur vestra" - "Meter Your Mains" |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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Marshall JCM800 Jubilee Special. Client reports making strange crackling noises.
Edited by kedwardsleisure - 10 February 2023 at 9:27am |
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Kevin
North Staffordshire |
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