Audiopipe APMN-2000

[caraudioguy2100]

This amp is using IRF640 for the outputs .

I couldn’t find any in stock when I ordered parts.

Wondering if I can get the IRF640N in there place ?

 

[Perry Babin]

Unless someone has tried this sub (repeatedly), it's going to be tough to know for sure.

 

[caraudioguy2100]

I replaced the the drivers and used the IRF640NPBF for testing

Amp has 98 volts of dc across the output terminals .

Any ideas ?

 

[Perry Babin]

I'd have to see the main and driver boards to make any suggestions.

 

[caraudioguy2100]

Here are some pics of the main board and audio driver board

 

[Hexhclass]

I used IRF640N in that amp all the time.

 

[Perry Babin]

The apdl-20001d is the same design and uses the N.

I'd remove the rectifiers and check the drive signals to see if there was a problem there.

 

[caraudioguy2100]

I get no drive on half the outputs .

Q8,Q7,Q6,Q5,Q8A,Q7A all have no drive

 

[Perry Babin]

Do you have two drive signals from the driver board?

 

[caraudioguy2100]

I have square waves on pins 6,7,10,11 on the audio driverboard .

So I have drive signals on the header pins of the driverboard

 

[Perry Babin]

10 and 11 are what they're using. 6 and 7 are not used on some of the newer amps.

Follow the signal to the input and output of the 6n137. If it's OK on both of those points, check the drivers.