Is it someone that have experience with this?
This is faulty,SMPS is burned,blown IGPT,FUSE.
Owner said that this had another service attempt but SMPS burned again immediately.
This is faulty,SMPS is burned,blown IGPT,FUSE.
Owner said that this had another service attempt but SMPS burned again immediately.
Attachments
Service manual available? Any circuit involved available?
Sounds like a nasty shorting somewhere. Needs lots of time & work te recover.
Sounds like a nasty shorting somewhere. Needs lots of time & work te recover.
I have post the circuit diagram already.
I would prefer some advice for the right IGPT gate waveform .
I would prefer some advice for the right IGPT gate waveform .
Sorry mate, I didn't notice (black truncated something).
But apart from your IGPT (IGBT?) request, with a smps, you'll can even find a snake under the toilet seat.
As P4PC50V IGPT isn't available from a trusted seller,how i can choose an available alternative IGPT? from Mouser?
the igbt's are obsolete; a nearest type is the RGT40TS65DGC11 in stock at digikey. also replace the bridge driver and all the bipolar transistors in the power supply. the igbt´s used here are ultra high speed, so the Ton /toff parameter is important as the dead time is set in the bridgedriver.
Thanks,my plan is to test this smps with a scope ,but i haven't a differential probe.
Second option is to power the driver chip only,looking for the output waveform.If you will have a look in posted circuit diagram,driver's chip power supply is isolated .A transformer is used.Next to this,is a simple diode rectifier and a 5v regulator.
Sadly,circuit diagram haven't any waveform.
The last option is to change anything,driver chip, driver transistors rectifier bridge,sensing resistors.clamp diodes,everything...
That's why i asked help from a familiar person.
I'm sure that this isn't the first failed Phonic mixer out there.
Second option is to power the driver chip only,looking for the output waveform.If you will have a look in posted circuit diagram,driver's chip power supply is isolated .A transformer is used.Next to this,is a simple diode rectifier and a 5v regulator.
Sadly,circuit diagram haven't any waveform.
The last option is to change anything,driver chip, driver transistors rectifier bridge,sensing resistors.clamp diodes,everything...
That's why i asked help from a familiar person.
I'm sure that this isn't the first failed Phonic mixer out there.
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this is a resonant type (LLC) converter, so the series cap C922 (large blue film cap) is rather challenged in current and voltage (1u/400V). so check the actual value, as self healing is euphemism for self destructing.
maybe some-one has accidentally switched the voltage selector switch (120/240)
maybe some-one has accidentally switched the voltage selector switch (120/240)
In the photos, I don't see anything shattered or charred,just a clear short circuit on the fuse, that's a good sign.
I'm no SMPS expert but I'll start with the basics in order.
(diode bridge, IGBT, capacitors, diodes, regulators)
May help .
I'm no SMPS expert but I'll start with the basics in order.
(diode bridge, IGBT, capacitors, diodes, regulators)
May help .
Very expensive 15,5€ plus the taxes
Mouser half the price 8,38€plus the taxes.
I guess what I already(posted above)have is not suitable?
Mouser half the price 8,38€plus the taxes.
I guess what I already(posted above)have is not suitable?
the main difference is the gate charge, almost double the Rohm device. Intrinsic igbt timing is comparable. So the littlefuse will need more gate drive power and as the input capacitance is larger, the 33 ohms gate resistors need to be changed to 18 ohms for a comparable non overlap delay. this is just theory, and the proper operation needs to be verified by an oscilloscope. so you need an isolation trasnsformer on amp the supply to operate the scope.
mouser has shipping cost of 18 euro for small orders, Radio Spares (now called RS-compoenents) only 7 euros. farnell also 18 euros.
I have found a lot of small signal transistors shorted, i suppose the IR2153 is faulty too.
Small signal transistors aren't available,i think that is time i give it up...
I found that long time ago,it was a repair kit in the market. Not available any more.
Αlso seeing many reports of repeated smps burned.I guess a bad designed smps.
I don't like an expensive questionable repair at all.
https://www.diyaudio.com/community/threads/powerpod-740-blowing-fuses-at-powerup.109317/page-3
PS I have both,isolation transformer and scope but i don't know what like must be the expected waveform.
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the transistors are not that special , other than the pinout (ECB), so you can easily find equivalents. It was said earlier that you can expect all active parts to be faulty. only replaceing all of them guarantees any chance of success.
