Anyone have any experience with a memphis MCH1300 5 channel amplifier

[scotts530]

I have a memphis model: 16-MCH1300 75wx4 class AB/1100wx1 class D amplifier I was wanting to know if anyone has any schematics for this amp because all of the resistors by the output transistors are burnt and I dont know what resistors to replace them with.

[Perry Babin]

Are you possibly referring to the power supply FETs?

They use 22 ohm resistors.

[Dr Zeus]

I beleive the output transistors for the Class-AB section are stamped IRF540/IRF9540 and there are 4 of each in this section of the amp. I forget what the Class-D section uses but probably similar and in higher quantities on both sides of the heat sync. The power fupply fets are close to the ~6x 20A fuses on the board and are maybe IRF3205.

Edit: I just looked up my old post, and it seems that is if this amp is similar to the Memphis Belle I worked on previously, then it may be using two types of PS fets: IRF3205 and FQP50n06. Check my post here:

Memphis Belle ST-1300D

[scotts530]

Do you guys think it is possible for me to fix this amp by just replacing all the transistors and all the burnt resistors with new ones or is there allways something else that had to go wrong for it to short the transistors and burn the resistors ? When you put power to the amp the green light comes on and doesn't go into protect mode but no sound comes out of the speakers. When you look inside the amp you can clearly see the row of burnt resistors and transistors I can post pictures if that would help any.