Hi folks
I have been running a DLCP / DLCP SMPS happily for a couple of years now driving my 3 way Wavecor / Accuton / AMT through Class A amps.
Recently it started shutting down intermittently, but would happily power back on .. for a while. I suspected an SMPS issue, and indeed the DLCP datasheet states that the unit will shut down if the +ve rail drops below 15v.
I contacted Hypex support, who had been helpful in repairing the SMPS failures (electrolytics) in my 4 NC400s, but they offer no replacement or repair of the SMPS DLCP.
The DLCP setup is in a Ghent Audio case, and runs fairly warm. So as it seemed a temp related issue, I removed the top case half for a good look around. Nothing too obvious, so tried running with the top off, so to speak.
Voila, no shutdown ! Tested for hours, happily listening to the music ..
So what runs hot ? Well, the voltage regulators, for a start. So I found some heat sink packs for £10 shipped, which needed some mods (saws involved) to get them in the space. Even after my work, everything still powered up and ran.
So on with the lid again .. all works OK, so leave it to sit on my favourite radio station with the amps off for a while. Boo, after an hour or two, down she goes. So it's drill time .. sorrry Mr Ghent, there's now a big slot under the row of 6 regs, and 3 decent sized holes in front of the SMPS to waft cooling air towards the slots in the back panel. Tested OK for a while, but despite all my efforts, it still shuts down, haven't done much to help.
What possibilities ??
Replacing SMPS electolytic caps (going on previous experience) - beyond my capabilities. Anyone know capable repairers of SMPS in UK / Europe ?
I know other Hypex SMPS are supposed to support the DLCP via J16 input to the DLCP, and I can see the Aux outputs of many are appropriate around +/- 20v, but where does that leave the digital circuits which require +8v ? If its OK why wouldn't Hypex support suggest buying an SMPS 400A100, for example?
Does any one here have a solution ?
cheers, Maurice
I have been running a DLCP / DLCP SMPS happily for a couple of years now driving my 3 way Wavecor / Accuton / AMT through Class A amps.
Recently it started shutting down intermittently, but would happily power back on .. for a while. I suspected an SMPS issue, and indeed the DLCP datasheet states that the unit will shut down if the +ve rail drops below 15v.
I contacted Hypex support, who had been helpful in repairing the SMPS failures (electrolytics) in my 4 NC400s, but they offer no replacement or repair of the SMPS DLCP.
The DLCP setup is in a Ghent Audio case, and runs fairly warm. So as it seemed a temp related issue, I removed the top case half for a good look around. Nothing too obvious, so tried running with the top off, so to speak.
Voila, no shutdown ! Tested for hours, happily listening to the music ..
So what runs hot ? Well, the voltage regulators, for a start. So I found some heat sink packs for £10 shipped, which needed some mods (saws involved) to get them in the space. Even after my work, everything still powered up and ran.
So on with the lid again .. all works OK, so leave it to sit on my favourite radio station with the amps off for a while. Boo, after an hour or two, down she goes. So it's drill time .. sorrry Mr Ghent, there's now a big slot under the row of 6 regs, and 3 decent sized holes in front of the SMPS to waft cooling air towards the slots in the back panel. Tested OK for a while, but despite all my efforts, it still shuts down, haven't done much to help.
What possibilities ??
Replacing SMPS electolytic caps (going on previous experience) - beyond my capabilities. Anyone know capable repairers of SMPS in UK / Europe ?
I know other Hypex SMPS are supposed to support the DLCP via J16 input to the DLCP, and I can see the Aux outputs of many are appropriate around +/- 20v, but where does that leave the digital circuits which require +8v ? If its OK why wouldn't Hypex support suggest buying an SMPS 400A100, for example?
Does any one here have a solution ?
cheers, Maurice
You know it's caps, they soak heat after a while. Adding the heatsinks to the regs might move the heat around, but they don't reduce the heat output any. Could you sink them to the chassis, at least that would put some heat outside the chassis, maybe 30% of it.
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