Marshall AVT150H class D conversion on the power amp?

[Kaporthulan]

Bought a AVT150H
Upon first use only the clean channel worked.
Now i opening up to look at it and the TDA7293 chips have been replaced before and have failed again. One looks to have let out smoke.

I amp hoping to replace the AVT50-62-00 with a class D power section. If anyone can assist me with this undertaking.

Can these even be done? Thanks!

 

[Printer2]

Here is the schematic.

https://music-electronics-forum.com...troubleshooting-repair/11655-marshall-avt150h

 

[JonSnell Electronic]

Modifying the TDAs to class D sounds like a recipe for disaster.
If you fit TDAs from fleabay, they will fail.
Purchase from a Ti distributor like RS Components, Mouser, Farnell etc.
Here is the schematics of the TDAs and power side.

 

[rayma]

Buy these instead of cheap fakes. How much is your time worth?
https://www.digikey.com/en/products/detail/stmicroelectronics/TDA7293V/599502

 

[Kay Pirinha]

This is it. There must have been a reason for these basically rugged chip amps to fail. It's also hard to imagine that a renowned company chose unreliable designs and components that aren't apt in their products.

Best regards!