Kicker DX1000.1 Protection help

[rhempz01]

I have a dx1000.1 that goes straight into protection. Power supply seems ok, no shorts anyway. The 4 16R resistors were burned r274,r273, r174,r173. I pulled a output and it tested ok. I tested multiple smd clmponents throughout the board all tested ok.

 

[rhempz01]

pcb

 

[rhempz01]

pcb2

 

[PapaZBill]

Remove R22-10K Ω to disable the output protection. This may burn up r274,r273, r174,r173. You can remove them for the time being. If the amp comes out of protection, check for drive at the output inductors and. Also, check to see if you have oscillation on the output terminals.

 

[rhempz01]

replaced the 16R resistors and the amplifier came out of protection after a few seconds. This is one of my favorite kicker amplifiers. I ran this model at 1ohm for about a year with out any issues. What is the major difference between the red 1ohm previous model and this yellow decal model.

 

[rhempz01]

My current unit.

 

[PapaZBill]

I don't recall there being any difference's. I will need to compare the two schematics. It's been a few years since I looked at these amps, but remember them being stout workhorses. I take it the amp is running now?

replaced the 16R resistors and the amplifier came out of protection after a few seconds. This is one of my favorite kicker amplifiers. I ran this model at 1ohm for about a year with out any issues. What is the major difference between the red 1ohm previous model and this yellow decal model.

 

[rhempz01]

they are definitely stout. One of my personal favorites. I always wondered what the differences were between the two. What made one 1ohm and the other not. I ran mine at 1ohm for along time and it seemed fine.
Yes its working perfectly now.

 

[PapaZBill]

There where a few things that changed. One resistor value change in the OCSET circuit of Pin 7 IRS20957 chips.

The other is a change to the circuit that controls the current sense Pin 3- of the UC3843, which would require a very detailed description without a schematic, which I can't offer.

I believe the reasoning to go from 1 to 2 ohm stable is, we where seeing a lot of amps come back that where being abused and unrepeatable.

 

[rhempz01]

makes sense, now that the cxa amplifiers are 1ohm stable im sure that problem.will resume again, from .8 and .5 loads ect... Is the new dxa line 1ohm as well?

 

[PapaZBill]

There where a few things that changed. One resistor value change in the OCSET circuit of Pin 7 IRS20957 chips.

The other is a change to the circuit that controls the current sense Pin 3- of the UC3843, which would require a very detailed description without a schematic, which I can't offer.

I believe the reasoning to go from 1 to 2 ohm stable is, we where seeing a lot of amps come back that where being abused and unrepeatable.

correction: Unrepeatable should be unrepairable

 

[PapaZBill]

makes sense, now that the cxa amplifiers are 1ohm stable im sure that problem.will resume again, from .8 and .5 loads ect... Is the new dxa line 1ohm as well?

I'm not sure if the DXA line will be 1 ohm. My guess is no.