NAD C320BEE

When I tried to adjust the bias I touch with the tip of the multimeter in one of the power rails and two fuses blown.
I replace the two fuses but every time I put the power on the same fuses blow again.
I'm not an electronic expert but I like to have some guidance from you guys and try to repairing it.
I'm only using the power section of this amp with a Yamaha pre-amp, but I do like a lot this power amp.
Thanks in advance.
Lica.
 
Well, it's likely an output transistor(s) has been damaged and is now a short circuit.
Attached is the service manual if you don't already have it.
Check them all with the diode test function of your multi meter.
You can usually check them while they are still in the circuit.
 

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