Alpine MRP-M1000

[caraudioguy2100]

I replaced the outputs and driver ic’s also check the gate resistors .

When I try to power the amp up it installs blows the outputs again.

It shorts Q4001,4002,4003,4004

Any ideas ?

 

[Perry Babin]

With those outputs out of the circuit, does the other half of the amp oscillate?

 

[caraudioguy2100]

With those outputs removed I get no rail to rail oscillation if that’s what you mean .

If that’s not what you mean how to I check to see if the other half is oscillating ?

 

[Perry Babin]

If you drive a signal into the amp, do you see that signal on the input pins of the driver IC (on the half that didn't fail)?

 

[caraudioguy2100]

Yes I see the signal on pin 8 but have to drive a very strong signal onto the amp

 

[Perry Babin]

The input terminals are 12 and 14 of the IR2010.

 

[caraudioguy2100]

No I do not see the signal

 

[Perry Babin]

Do you see a square wave on terminals 1 and 12 of IC9704.

 

[caraudioguy2100]

No

 

[Perry Babin]

Are you driving a signal into the amp?

 

[caraudioguy2100]

Yes I’m driving signal onto the amp a 100hz some wave .

But I do not get a square wave on pins 1,12 of ic9704

 

[Perry Babin]

This is the half that survived, correct?

 

[caraudioguy2100]

I rechecked a couple things .

It doesn’t appear the amp is powering up

It’s not producing rail or regulated voltages now