Rockford Fosgate R400-4D

[caraudioguy2100]

Anyone know what diodes these are or have a part number ?

 

[twilliar]

More than likely

You can find a lot of info here
The SMD components marking codes database - Index page

 

[caraudioguy2100]

D211 was shorted

It connects between the drain of the output and the driver ic .


Does anyone know what one is likely being used out of the 2 I posted?

 

[caraudioguy2100]

Never mind they are both wrong

The one I should have ordered is a ES1DL

 

[Perry Babin]

The J would generally be OK as a sub for the D for testing.

 

[caraudioguy2100]

How do I tell what regulator goes here ?

When I powered it up it blew the face off it and not sure where the gave of it went ?

It’s either a LM337 or a LM 317

Just wondering how do I tell which one it is

 

[Perry Babin]

The pin configuration is different.

See if the input leg of the other regulators goes to any of the legs on that regulator. It may be the same as IC705 since the programming resistors appear to be the same.

 

[caraudioguy2100]

I tried both of them and still can’t get the amp to produce audio .

It doesn’t appear to have any of the legs connected together .

The amp already has 1 LM317 and 1 LM337 installed but can’t figure out what the middle one is that goes between them

 

[caraudioguy2100]

It may not be a regulator .

I get the following voltages off the pads of it

Leg 1:-2.36
Leg 2:-2.58
Leg 3:27.30

This is off the pads with nothing installed in that location

 

[Perry Babin]

It looks like an LM317.

What is IC705?

 

[caraudioguy2100]

IC705: LM337

 

[Perry Babin]

Install a 317 in IC704 and post the voltage on all terminals.

 

[caraudioguy2100]

Leg 1:14.02
Leg 2:15.28
Leg 3:27.14

 

[Perry Babin]

What's wrong with that?

 

[caraudioguy2100]

IC705 is a LM337

Amp powers up and produces rail and regulated voltages I just can’t it to produce any audio .

Not sure if these are the muting transistors but for there to be no audio on all 4 channels and ever single muting transistor bad is probably unlikely

 

[Perry Babin]

What are the markings on the transistors?

Do you have rail; to rail oscillation?

 

[caraudioguy2100]

The transistors are marked MAX

And I do not get rail to rail oscillation

 

[caraudioguy2100]

Ok I found that the positive 5 volt regulator isn’t working its only has 0.79 volts on the output leg

 

[caraudioguy2100]

Ok got this amp back with a new problem .

It’s stuck in protection mode .

Here is what I get on the 494

Pin 1:4.21
Pin 2:4.97
Pin 3:0.10
Pin 4:0.07
Pin 5:1.59
Pin 6:3.36
Pin 7:0.00
Pin 8:12.67
Pin 9:5.13
Pin 10:5.13
Pin 11:12.67
Pin 12:12.67
Pin 13:4.97
Pin 14:4.97
Pin 15:7.97
Pin 16:0.00

 

[Perry Babin]

The power supply is functioning.