SPL Dynamics S-6002

[menime]

Hi,

i have a S-6002 2 Channel A/B amplifier.

The Transistordrivers get really fast very hot, the current starts at 2,4A and go in 10 Seconds higher than 4.5A. Then i remove the remote signal, before it gots more damage.

Any Idea? Measured +- 22V DC in OP-Amp Voltage.

Thanks

 

[Perry Babin]

Was it overheating when the transistors were tightly clamped to the heatsink?

 

[menime]

Then the pre drivers start heating up more and more. They start really fast to smell. Current also rises. I've desoldered every part in Pre-amp and testet separate. Found nothing bad.

Im not sure if the 22 Volts are correct.

 

[Perry Babin]

Was it overheating when the transistors were tightly clamped to the heatsink?

 

[menime]

Yes, see my previous post.

 

[Perry Babin]

±22v is high but the fact that they're equal, it could be normal. You need to look at the regulators to see what they're supposed to put out.

Is it the outputs or the PS FETs that are heating up?

 

[menime]

There A1011 and C2344 drivers for the outputtransistors. They get hot.

 

[Perry Babin]

Does the amp produce audio?

Why was it taken out of the vehicle?

 

[menime]

Burned transistors in outputsection

 

[Perry Babin]

The drivers are supposed to be clamped to the heatsink. Are they getting hot when clamped tightly to the heatsink?

 

[menime]

When i clamp the red ringed drivers down to heatsink, the blue ringed starts to get hot until they start smell.

I think there is any problem i don´t find.

With mounted outputs, it starts direct with around 8A and rises fast. Under 1 second the drivers hot. outputtransistors still cold.

 

[Perry Babin]

Do both channels do the same thing?

Did you repair both channels?

Did you examine the regulators to see if they were working as they should (proper output for the design)?

 

[menime]

What's in your opinion the best way start to search?

Remove all outputtransistors?

I think it is only on site. I changed all outputs (both sides)

Regulators are tip41c and tip42c.

Think they where regulated from zener diodes.
Will post pictures tomorrow.

Thanks a lot