hifonics bx1505d ics erased?

[Stetsom23]

hi guys
i have some troubles with this hifonics bx1505d
at very lower volume sounds but with distortion and some dc on outputs (1v)
and i hear hifonics and other class D Amplifiers a lot of problems is about the drivers stage

and the driver stage have 2 ic erased and im almost sure is that the problem.
i measure all the diodes, and transistors in the drivers stage and are ok, also the fets outputs are okei

can anyone of you guys could please tell me which ic are that

thank you

 

[Perry Babin]

U2 = TL072
U3 = LM211

Whoever pulled that driver board did serious damage to the main board. The only pins that appear to have little or no damage are 1-1 and 2-3. Every other one has copper pulled from the main board. These copper vias connect the top and bottom of the board. You may have to solder every pin that has a trace on the top of the board connecting to one of those pins on the top side of the board.

Chipquik is a low temperature solder that can help prevent this.

 

[Stetsom23]

U2 = TL072
U3 = LM211

Whoever pulled that driver board did serious damage to the main board. The only pins that appear to have little or no damage are 1-1 and 2-3. Every other one has copper pulled from the main board. These copper vias connect the top and bottom of the board. You may have to solder every pin that has a trace on the top of the board connecting to one of those pins on the top side of the board.

Chipquik is a low temperature solder that can help prevent this.

Hi Perry
thanks to answer
i know about the damage but that is not so important i can fix that. the problem is about that ics.
about my problems and ics what it is your opinion
that ics could be the problem?
and you are sure is that ics you say? (i trust in you Perry, so im a little worry)4

thank you

 

[Perry Babin]

Unless they changed something recently, that's the part number for those ICs.

Those fail but only rarely.

Do you have a scope?

 

[Stetsom23]

nop, i dont have scope..
mmm you have some idea what to do?

 

[Perry Babin]

Not having a scope makes it more difficult to troubleshoot class D amps.

Did you confirm that the amp was producing both positive and negative rail voltage?

Positive and negative regulated voltage?