kicker kx 1200.1 problem

[flycrazy]

! got a kicker kx 1200.1 off a buddy he said it smoked i opened it up seen where it smoked and ordered some of the parts .But red on here i might need more if the irf3205 blew but also the little chip marked with 22 on top between the irf3205 mosfits what are they called ? And where can i buy them? and what other chips will i have to order? I will post picks in few mins

 

[Perry Babin]

Green board?

Marked 220 instead of 22?

 

[flycrazy]

On the board its mark r74 when i look at am samatics it ays 22 thats it how do u post pics on here and i will post pics

 

[Perry Babin]

Click 'go advanced' then 'manage attachments'.

You stated that the component was marked 22. It's likely a 22 ohm resistor that is marked 220. The resistor is a 1206 size (you can confirm the dimensions with a dial caliper 0.12" x 0.06")

 

[flycrazy]

I tried to upload pics but said my token is missing but if you look at the kicker kx1200.1 numbered r71 r72 and so on and all it says is 22

 

[Perry Babin]

See attached.

 

[flycrazy]

Yup thats them they are 220 hmmm even when i looked at kicker scmatic it says 22 lol . now what are that called when the mosfits went up it chard them up good to and is there anywhere else i should look or parts i should switch

 

[Perry Babin]

The markings indicate 22 with a 10x0 multiplier which gives 22 ohms.

Q10 and Q16 may have failed.

Have you checked the output transistors to see if any are shorted?

 

[flycrazy]

Ok 22ohms but whats the name or where can i buy them and yes the q10 q16 failed i have them on way aswell as the mosfits just need them 22 ohms thing and what test are u saying i have to do

 

[flycrazy]

Wheres the output transistor

 

[Perry Babin]

Please read the basic amp repair tutorial. Follow all links and read those pages. The link is in the sig line below.

 

[PapaZBill]

R74 is the gate resistor for Q74. The replacement is a 22 ohm 1206 sm resistor commonly marked 220 on a 1206 sm. You should replace all mosfets and Q10 & Q16(KTA1266GR) and any gate resistors that are out of value 5% or more. Be sure to check all of the outputs and D61 & D63 rectifier diodes.

A good practice would be to check the triangle wave pin 5 of U101 and the drive pulses pins 9&10 of U101 after you remove all mosfets and replace Q10 & Q16,and before you install fresh IRF3205's .

If you have an oscilloscope posts screen shots and DC voltages around U101 black probe on power ground are useful for determining a U101 and C12 have not failed.

 

[flycrazy]

i just ordered this i think i got right ones let me no please

100PCS 22ohm Ω 22R Mark(220) 5% 1206 1/4W SMD Chip Resistor 3.2mm×1.6mm

 

[PapaZBill]

Yes

Sent from my HTC Desire 626 using Tapatalk

 

[flycrazy]

I dont have what u said but i have a good multimeter how do i test with that and looking for that u101 and c12 i cant fined them abouts where on the board are they

 

[Perry Babin]

Post the DC voltage on pins 9 and 10 of the TL494 as well as pin 1 of Q10 and Q16.

 

[flycrazy]

So do i wait till the q10 and q16 are replaced and and how do i no what pins are what number

 

[Perry Babin]

See attached.

Which components have you removed?

 

[flycrazy]

I removed all the irf3205 mosfits and q10 and q16 and sorry for the question jist my buddy gave me amp and its sweet amp to just chuck out and something for me to learn this stuff on

 

[flycrazy]

the d61 and d63 look like masfits right?