Kicker KX1200.1 Class D blown

mbates14 · 31st January 2010, 07:03 PM

Just ran into one of these, it has U508 burned and blown, along with R333, R233, and R559.

Someone has been into this thing before, all the outputs have been replaced by someone else along with the 2 drivers and a few more resistors.

They forgot to do these parts i guess.

Here is the problem. the resistors are burnt beyond recognition so i cant figure out what the values are.

Also the U508 are one of the ICs with the scratched off numbers, but the IC is fried and blown. Does anyone know what this IC is?

Perry Babin · 31st January 2010, 07:11 PM

R559 = 1k
R333 = 180
R233 = 180
U508 = LM361

mbates14 · 31st January 2010, 07:16 PM

ok. I just found R323 blown. what is it?

mbates14 · 31st January 2010, 07:20 PM

Also need R303, R223, R203 along with R323 as requested.

Perry Babin · 31st January 2010, 07:24 PM

223, 323 = 120 ohm 1%

203, 303 = 220 ohm 1%

mbates14 · 2nd February 2010, 03:37 AM

k. parts are on order, hopefully she will be an easy fix... anything i should watch out for?

Perry Babin · 2nd February 2010, 07:30 AM

While the LM361 is out of the circuit and after replacing all known defective components, connect a jumper between the two points indicated on the attached photo. When you power the amp up, there should be absolutely no DC on the center legs of the outputs.

mbates14 · 2nd February 2010, 06:51 PM

the amp came onwith defective components before, just no audio.

mbates14 · 3rd February 2010, 12:30 PM

perry i sent you a PM...

mbates14 · 5th February 2010, 04:00 AM

Changed those parts and shes boomin again....

31st January 2010, 07:03 PM	#1
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	Kicker KX1200.1 Class D blown Just ran into one of these, it has U508 burned and blown, along with R333, R233, and R559. Someone has been into this thing before, all the outputs have been replaced by someone else along with the 2 drivers and a few more resistors. They forgot to do these parts i guess. Here is the problem. the resistors are burnt beyond recognition so i cant figure out what the values are. Also the U508 are one of the ICs with the scratched off numbers, but the IC is fried and blown. Does anyone know what this IC is?

31st January 2010, 07:11 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	R559 = 1k R333 = 180 R233 = 180 U508 = LM361 __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

31st January 2010, 07:24 PM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	223, 323 = 120 ohm 1% 203, 303 = 220 ohm 1% __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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31st January 2010, 07:16 PM	#3
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	ok. I just found R323 blown. what is it?

31st January 2010, 07:20 PM	#4
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	Also need R303, R223, R203 along with R323 as requested.

2nd February 2010, 03:37 AM	#6
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	k. parts are on order, hopefully she will be an easy fix... anything i should watch out for?

2nd February 2010, 06:51 PM	#8
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	the amp came onwith defective components before, just no audio.

3rd February 2010, 12:30 PM	#9
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	perry i sent you a PM...

5th February 2010, 04:00 AM	#10
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	Changed those parts and shes boomin again....

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