Help with Memphis 1000D's

[project pat]

Didn't you state that one of the two 640s had failed and one of the 9640s had failed?

Yes, the second amp I worked on had one of each blown on the same output side of the amp. The first amp had a 640 blown on one output side, and a 9640 blown on the other output side. Uh oh, I might of just clipped out all of the output transistors in the first amp for nothing.

 

[Perry Babin]

If one of each parallel group failed, all in the parallel group must be replaced (if you want the amp to be as reliable as possible).

 

[project pat]

If one of each parallel group failed, all in the parallel group must be replaced (if you want the amp to be as reliable as possible).

I'm a little confused, are the two separate parallel groups in parallel with eachother or something?? I'm just trying to learn as much as possible. Either way I took them all out so I have to replace them with new ones. Thanks again for your assistance.

 

[project pat]

I'm a little confused, are the two separate parallel groups in parallel with eachother or something?? I'm just trying to learn as much as possible. Either way I took them all out so I have to replace them with new ones. Thanks again for your assistance.

I was confused because you didnt say wether or not I pulled the others out for nothing. I think from what your saying though I did. You learn as you go I guess.