petehall347
the brandy coffee man
trying to get to bottom of this as i understand it you tried removing power from each module but only by disconnecting both allows the relay to click ?
why is it not good to run without a module in circuit ? i never considered this as a problem . am always learning .
When you remove the outputs, the circuit "floats' and you cant troubleshoot it correctly. If you add a 1k from the input of the stk to the output, then you can trouble shoot the rest of the circuit.yes, when power is disconnected from BOTH new modules (orange and red wires), speaker relay clicks, and I have sound via headphones, although distorted.
I am not 100% sure it is the STK darlingtons, but chances are, they are the problem. This is exactly why I designed the replacement module so that you know with a high degree of confidence that you should be able to fix the power amps in a sx-780 for the life of the unit.
So I suggest that you make some up and take the guess work and frustration out of the repair.
You make replacement modules? Do you have any for sale?
To be honest, you are wasting your money and time in this quest, that is why I design a replacement to put an end to these rip offs.i need to find a source for some good darlingtons
turns out my ebay module was either doa or got killed because of faulty emitter resistors. swapped out a few resistors in the bad channel along with the .22ohm resistors and still no click when new darlington is installed. swapped the good channel darlington into the bad channel and it works fine now. i need to find a source for some good darlingtons
I have an order for 50 PCB's on the way.