I have an Orion cobalt 2100 that has a similar issue to problems that have been discussed here before. Problem is it doesn’t look like it was ever solved in the other threads.
This amp started taking out speakers then the magic smoke came out. Opened it to find a fried rail cap that also took out a trace. A couple of resistors desoldered themselves too.
I replaced all electrolytic capacitors. I tested the output fets and found one to be very leaky. I replaced all output fets with some equivalent parts that were recommended on a different thread. I also replaced all resistors that looked burnt in the middle.
The problem is the amp draws too much current at idle and heats up rapidly. The output fets get warm. I placed my meter in series with the source resistor and got about 60mA before the current limit on my power supply kicked in.
The driver transistors get really hot. I have already replaced them with no luck. They are marked with silver on top.
Any suggestions on what to check next?
Cheers
This amp started taking out speakers then the magic smoke came out. Opened it to find a fried rail cap that also took out a trace. A couple of resistors desoldered themselves too.
I replaced all electrolytic capacitors. I tested the output fets and found one to be very leaky. I replaced all output fets with some equivalent parts that were recommended on a different thread. I also replaced all resistors that looked burnt in the middle.
The problem is the amp draws too much current at idle and heats up rapidly. The output fets get warm. I placed my meter in series with the source resistor and got about 60mA before the current limit on my power supply kicked in.
The driver transistors get really hot. I have already replaced them with no luck. They are marked with silver on top.
Any suggestions on what to check next?
Cheers
