Sanyo/B&O Icepower 200AC Rev.D, schematic about rev. engin., not complete finished

[kees52]

Feedback cause oscillating, it forms a oscillator, in fact we can talk about a power comparator.

 

[kees52]

Here the attachement

Here is a fault, the connection to the mosfetdrivers.

 

[Bigwolf]

I have a failed Icepower 200ASC ver. M from a B&W ASW608 subwoofer.
The yellow LED (protection) lights up when the voltage on the speaker or 4 Ohm load exceeds 4Vrms, so only 4-5W are output instead of "200W". After a few seconds, the protection switches off, but will reappear if the output voltage exceeds ~4Vrms.
Any ideas?

 

[Bigwolf]

Checked: problem with PSU, 47V drops under small load. Quiet clicks from SMPS transformer. I need schematic for SMPS part of 200ASC.

 

[chienmort]

Sorry but ICEPower do not give out circuit diagrams/schematics even to their OEM users.

 

[bucks bunny]

Checked: problem with PSU, 47V drops under small load. Quiet clicks from SMPS transformer. I need schematic for SMPS part of 200ASC.

Smells like weak electrolytics on the secondary side

 

[tiefbassuebertr]

Sorry but ICEPower do not give out circuit diagrams/schematics even to their OEM users.

one of the developers under
https://audioxpress.com/article/outline-icepower-an-audio-company-that-also-does-amplifiers
actually must have schematics and hints for an troubleshooting procedure and due the age of more than 15 years of the modules asked in post #1 schematics are no longer confidential - so I think.