I bought one of these amps blown from one of my friends .
The issue is the outputs are blown in the amp .
The original part number is IRFB3207
Would the Z version work ?
The issue is the outputs are blown in the amp .
The original part number is IRFB3207
Would the Z version work ?
There are a total of 64 outputs in this amp . I tested all of the outputs out of the amp and found 2 to be bad .
Should I replace all 64 outputs ? Or can I just replace all the ones that are in parallel with each other ?
Should I replace all 64 outputs ? Or can I just replace all the ones that are in parallel with each other ?
If it's your amp, you could just replace the parallel FETs.
If you were going to sell it, I'd replace all of them since all of the outputs were likely subjected to the same thing that caused the shorted outputs to fail.
If you were going to sell it, I'd replace all of them since all of the outputs were likely subjected to the same thing that caused the shorted outputs to fail.
They are using IRFP4242 as the power supply fets in this amp with 47 ohm gate resistors .
Is there a good replacement for the power supply fets ? Since the 4242 is obsolete
Is there a good replacement for the power supply fets ? Since the 4242 is obsolete
Ignore posts #5 and 6.
After a bit of reading, it appears that this amp uses the power supply to directly produce output. The IRFB3207 FETs are on the primary side of the power supply.
Are the IRFP4242s connected to the output terminals, in any way?
After a bit of reading, it appears that this amp uses the power supply to directly produce output. The IRFB3207 FETs are on the primary side of the power supply.
Are the IRFP4242s connected to the output terminals, in any way?
Let me rephrase post #10
There are a total of 6 IRFP4242’s in this amp .
This is a push pull design on the outputs .
Say you have a dual voicecoil sub 1 coil gets hooked to 1 side of the amp and the other coil gets connected to the other side of the amp . So 1 coil per output terminals .
On 1 side of the amp the source leg is connected to the positive speaker terminal .
Measuring with my meter I get 0.1 ohms from source leg to positive speaker terminal .
On the other output terminals The drain leg of the 4242 connects to the positive speaker terminal .. 0.1 ohms with my meter
There are a total of 6 IRFP4242’s in this amp .
This is a push pull design on the outputs .
Say you have a dual voicecoil sub 1 coil gets hooked to 1 side of the amp and the other coil gets connected to the other side of the amp . So 1 coil per output terminals .
On 1 side of the amp the source leg is connected to the positive speaker terminal .
Measuring with my meter I get 0.1 ohms from source leg to positive speaker terminal .
On the other output terminals The drain leg of the 4242 connects to the positive speaker terminal .. 0.1 ohms with my meter
I understand the basic operation of the amp but calling the 3207s the outputs and the 4242s the PS FETs has me a bit confused.
What makes you call the 4242s the PS FETs?
The corresponding terminals of the 4242s are likely connected to the same type of terminals (signal vs ground) for each output.
Are the 4242s defective?
What makes you call the 4242s the PS FETs?
The corresponding terminals of the 4242s are likely connected to the same type of terminals (signal vs ground) for each output.
Are the 4242s defective?
Sorry I don’t understand this amp .
I thought the 3207’s were the outputs and 4242’s were the power supply fets my mistake
The 4242’s on a few of them the legs are broken I guess I could solder new legs onto them . Just didn’t want the amp to look rigged together .
I thought the 3207’s were the outputs and 4242’s were the power supply fets my mistake
The 4242’s on a few of them the legs are broken I guess I could solder new legs onto them . Just didn’t want the amp to look rigged together .
Replacing all 64 mosfets is recommended, but replacing the bank where the shorted mosfets are, should be okay. Be sure to check the Driver boards with HCPL0601 opto-couplers on them. The circuit is the same used in the ZX1000.1 and ZX1500.1
The Power Supply mosfets are the IRF3207 and the IRFP4242 are pass mosfets. The gates and sources are turned on by the microcontroller based on the input signal. One bank of three are turned on during the positive swing the other bank by the negative swing, each driving their own VC. So as Perry stated the power supply is switched on and off along with the pass mosfets to produce the output.
Lenin89 Post #14 is a good explanation of the operation of the amp with a dual VC.
As has been mentioned this is a unique design, and is NOT a Class D amp. Because the power supply is essentially modulated by the input signal it's in a class that as far as I know has no equal!
We have seen them from time to time here at Kicker, although not for sometime. Unfortunately it can been an expensive repair couple with shipping costs.
The Power Supply mosfets are the IRF3207 and the IRFP4242 are pass mosfets. The gates and sources are turned on by the microcontroller based on the input signal. One bank of three are turned on during the positive swing the other bank by the negative swing, each driving their own VC. So as Perry stated the power supply is switched on and off along with the pass mosfets to produce the output.
Lenin89 Post #14 is a good explanation of the operation of the amp with a dual VC.
As has been mentioned this is a unique design, and is NOT a Class D amp. Because the power supply is essentially modulated by the input signal it's in a class that as far as I know has no equal!
We have seen them from time to time here at Kicker, although not for sometime. Unfortunately it can been an expensive repair couple with shipping costs.
