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Class D Switching Power Amplifiers and Power D/A conversion

Powersoft K8
Powersoft K8
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Old 10th November 2012, 08:38 AM   #1
ultra is offline ultra
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Default Powersoft K8

Hi all.
A Powersoft K8 came in for repair due to water damage.
Upon repairing a track on the underside of the pcb, i also found
a bad voltage regulator.
Unfortunately it is cracked open and i am not able to see which one is it.
I am referring to U4 in the power amplifier section.
Here is a pic that might help.
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Old 11th November 2012, 04:53 PM   #2
gatabil is offline gatabil  Turkey
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any have a service manual ?????
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Old 12th November 2012, 09:17 PM   #3
tomi is offline tomi  Wales
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You'll probably have thought of this, but is there an identical regulator doing the same job on the other channel?
I suppose looking at the voltage ratings of connected caps on the output would give you a ballpark idea of the o/p voltage.

I understand that powersoft are a bit cagey with their service data, unfortunately.
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Old 13th November 2012, 12:43 AM   #4
DjLeco is offline DjLeco  Romania
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Powersoft K8
U4 is LM7915, 15 volts negative regulator.
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Old 14th November 2012, 12:24 AM   #5
ultra is offline ultra
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Thank you.

I think i came to the same conclusion myself.

There are only multilayer capacitors in the input and output of the regulator.

I only knew for sure it was a negative type.

Thanks again.
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Old 14th November 2012, 01:18 AM   #6
DjLeco is offline DjLeco  Romania
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Powersoft K8
Can you please make for me some GOOD QUALITY pictures of entire amplifier, divided in sections, from UP, so I can observe better what they do there?

Interesed to see inductor coils, output filters, storage capacitors, etc

Please sent on my email: claudiu971@yahoo.com


Thank you and good luck in repair!
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Old 18th November 2012, 04:48 PM   #7
gatabil is offline gatabil  Turkey
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hi. if interested!!!

powersoft digam schematic d7000 link is...
Salida Digan 7000
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Old 27th April 2014, 07:34 AM   #8
Rudi76kediri is offline Rudi76kediri  Indonesia
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hi all..!!

any have schematic powersoft 5000/7000..?
i have trouble with this device.

thank's for all member..!
please send for file to my mail.
joerudi1976@gmail.com
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Old 13th November 2014, 12:16 PM   #9
adishor_2005 is offline adishor_2005  Romania
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hello do you still have this powersoft amplifier? i have a problem with mine there are 2 blown zener diode and i cand't see the value, the position of the diodes in the board it's marked on the picture...
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Old 5th November 2015, 05:04 PM   #10
rivulet is offline rivulet
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Default Powersoft Digam 5000-7000

hi,

any have schematic powersoft 5000/7000..?

thanks a lot

mail: rivulet@volny.cz
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