SPL Dynamics S-6002

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
 

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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.
 
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.
 

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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