Hello guys. Might not be the right place to put this, but here goes.
I just received a beast of a receiver, a Kenwood KRX1000. I plugged it in and the clipping light flashes. Opened it up and saw two of the main transistors and the one in the centre were blown. It would be a shame to strip this monster for the transformer and other parts.
Part no's on the transistors are 2SB1570 and 2SD2401. In between those two on the same heatsink is a smaller transistor with the code C4137. That's all I can see on the little one.
Can anybody tell me if there is an equivelant to these transistors?
Regards
Cedric
Image taken off the net, this what they look like.
I just received a beast of a receiver, a Kenwood KRX1000. I plugged it in and the clipping light flashes. Opened it up and saw two of the main transistors and the one in the centre were blown. It would be a shame to strip this monster for the transformer and other parts.
Part no's on the transistors are 2SB1570 and 2SD2401. In between those two on the same heatsink is a smaller transistor with the code C4137. That's all I can see on the little one.
Can anybody tell me if there is an equivelant to these transistors?
Regards
Cedric
Image taken off the net, this what they look like.
kenwood kr-x1000
I have the same problem. I think this c4137 transistor is used to bias these darlington transistors but I can't find a closest replacement for it. The NTE replacement is not the one that really replace the c4137 (I think...) because the case is not the same, but maybe this is not a way to measure if it work or not, it just won't fit on board. Other thing is, that i buy an identical c4137 and it blown and burn some resistors, make me think that is another chip with the same number. Some one please help us!!!! I'm trying to use the amp without this channel, but I think it will get protection circuit activated.
I have the same problem. I think this c4137 transistor is used to bias these darlington transistors but I can't find a closest replacement for it. The NTE replacement is not the one that really replace the c4137 (I think...) because the case is not the same, but maybe this is not a way to measure if it work or not, it just won't fit on board. Other thing is, that i buy an identical c4137 and it blown and burn some resistors, make me think that is another chip with the same number. Some one please help us!!!! I'm trying to use the amp without this channel, but I think it will get protection circuit activated.
All transistors are available from many suppliers, here is one; 2SB1570 Sanken | 2SB1570-ND | DigiKey
Find the fault that caused the transistors to fail and then replace the output transistors and bias chain.
Find the fault that caused the transistors to fail and then replace the output transistors and bias chain.
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