Deaf Bonce Outputs

[RJohns777]

Hi. Working on a Deaf Bonce Apocalypse AAB-11800.1D. The outputs are shorted. The only number on the output is C2. Anyone familiar with this mosfet? Anyone know a good sub? Thanks.

 

[Bertje]

IRFB4321 should work. It's the same board as the Soundigital evo 12k , not very fine amps to work on..

 

[laluns]

you will also need to check the drive chip and drive buffer ic. On the drive chip pins 1 you should get around 10v and pins 2 around 5v.If you do not get those voltages you will need to replace the chips

 

[RJohns777]

Thanks Bertje And Laluns. They've ground the numbers off these chips. Do you know the chip mumbers and location on the board. Thanks

 

[RJohns777]

Here's a pic of the board.

 

[ultra]

There is a possibility that i can get those parts for you, but they will also be grounded off.

 

[AzeemSA]

hello everybody

these boards are quite the nightmare to repair if you arent a certified dealer.

@barevides has posted avideo in which he has done valuable reverse engineering on these boards. his breakdown is quite indepth.

here is the link below

YouTube

i hope this helps all of u

i have downloaded the video and added to my copy of Perrys ART incase one arrives at my bench in the future

 

[Bertje]

I will post the partnumbers.

I have a AAB 11800 defective here, but with replaced both driver IC's and 4 gatedrivers and mosfets, it started up with clipping led on. Railvoltage will come on after about 30 seconds, so check also the duty cycle of the gate of H3 power supply mosfets (just small peaks with the amp I have..). The systemcontroller (PIC 16F1828) is defective or see some wrong inputsignals.
All low voltage power supplies seems te be ok.

 

[Lenin89]

IRFB4321 should work. It's the same board as the Soundigital evo 12k , not very fine amps to work on..

These WILL NOT WORK !
I've already tried it and could not manage to make it work.

Couldn't manage to repair the amp due to too much board damage and not available output mosfets in my region.

Check NSV/Barevids video on SoundDigital amps.
YouTube

Ground Zero, Alphard and couple more brands, their full bridge amps are all Sound Digital brazilian style amplifiers, just different heatsinks and decals. All of them are made by Sound Digital and their customer support is - "please send the unit to our certified repair center" and "we can't provide that information"....

Hope that helps.

 

[Bertje]

Barevids video just tells mosfet C1 = IRFB4127 and C2 = IRFB4321....

 

[Lenin89]

The one I was repairing, also AAB-11800.1D, wouldn't work with C1 = IRFB4127....maybe there were another issue, which I could not manage to solve.

Maybe You will have a better luck than me. I'll follow the thread.

 

[laluns]

Here's a pic of the board.

I sent you a PM . Please check and let me know.

Also see the pic that you posted you need to look at the components in front of it. Looks like there was a short there because if you look at the one side of the big 10 ohm you will see a black spot on it. if I was you I would first check those components in front of the resistor.