Kicker KX1200.1

[caraudioguy2100]

Anyone know the value of C87 it sits by the transformer in the power supply

 

[Easyamp]

1nf 100v

 

[Perry Babin]

C87 is the electrolytic. 1000uF@100v.

C42 is the damaged cap. 0.1uF.

See attached.
Service manual, eprom result list | Elektrotanya

 

[caraudioguy2100]

What would cause C42 to burn ?

 

[Perry Babin]

Possibly from the positive speaker output shorting to ground.

 

[Easyamp]

Mine is 1022pf. I don't have the schematic but do have the amp.
I de-soldered what i thought was C87 and measured it at 1022pf.
I have since downloaded the manual and it is supposed be 100n.
Maybe it was replaced, I bought it used?

 

[caraudioguy2100]

I noticed more damage when I pulled back the silicone from the transformer .

Anyone have a high resolution pic of this area ?

Or could tell me where the traces go ?

 

[Easyamp]

C84 goes between pin 1 of the kia7812 voltage regulator and secondary side ground.

 

[Perry Babin]

See attached.

 

[caraudioguy2100]

Do you know the value of C40 ?

The service manual is hard to read on my iPhone

My computer is down at the moment

 

[Easyamp]

C40 100n

 

[caraudioguy2100]

Replaced the caps and resistor .

Next problem I have is I get 13 volts of dc on the rca shield ground .

If I try plugging rca jacks into the amp it will start drawing excessive current

 

[Perry Babin]

Twist the transformer to see if the voltage changes.

 

[caraudioguy2100]

Twisting the transformer has no effect still have 14 volts on rca shield ground

I read a direct short between the rca shield ground and positive battery terminal 0.3 ohms

 

[Perry Babin]

Is the voltage on the RCA shields essentially identical to the 12v supply voltage?

 

[caraudioguy2100]

Yes .

I read a direct short from rca shield ground to Battery + terminal of the amp

 

[Perry Babin]

The short in the transformer may be deeper than they normally are.

 

[caraudioguy2100]

I will have to remove the transformer and find the shirt since I can see it sparking when I twist it more but can’t break the shorted winding I think the shirt is underneath

 

[caraudioguy2100]

I think i found the short in the transformer .

Here are some pics of what I found