Hi all, i have an Akai am 65 amp which has a great sound and I want to hold onto it. It recently developed a fault where the left channel is completely dead. I've found the problem and it's a transistor which has blown, the area around the circuit board is black where the transistor belongs. I've made contact in Britain with Akai but I have had no response. I wonder whether anyone knows what the equivilent transistor is for the one that has blown as the code number on the blown transistor doesn't seem available anywhere, I've tried googling it to no avail. The code on the transistor is as follows:- D1762 F D Does anyone please know what the equivilent code is so I can do a repair and not have to throw out the amp for the sake of a transistor. Thanks for your anticipated help.
Hi Nuck, I'm based in North Wales, United Kingdom, it's not known for it's electronic establishments. I've got no problem in ordereing on-line, but none of the on-line shops seem to have the code of the transistor which is my stumbling block. It's a good amp and I don't want to get rid of it for the sake of 1 component. Brian.
You should be able to cross-reference the # with any electronics supply house. I cant make out the brand in the pic, but I think it is a FET. If you can determine the manufacturer, a supply house will provide options. Replace them all, and use a heat sink compound to mount them. Clean the heat sinks with acid flux before mounting them.
I will look this up at work on my next 'on' cycle. We have an extensive collection of books listing replacement transistors for darn near everything. Is there a mark on this transistor, or one of its mates? The manufacturer of this unit may be of some help. You may also google 'semiconductor replacement' or the like.
The other problem is if as you describe, the circuit board is 'charcoaled', then it may be difficult to NOT have a low-grade short. Be sure to clean all that crap out of there and make sure all the traces (the shiney part that actually conducts electricity) are intact.
NUCK:: it's been years since I've had to do this, and I simply can't remember the name of the book. can you help with the name?
I just googled 'transistor substitution' or some such and got the NTE site. I did a cut/paste of the number provided by Brian and out popped NTE377. Might even be the right transistor. At least it is a TO-220 which is correct.
glad to see more AKAI users I have an AKAI AM-A70 and I agree they are awesome amplifiers, I don't let anyone near it! It's unfortunate that you're having a problem with yours, if I could help I most certainly would.
I have an AKAI AM-A70 and I agree they are awesome amplifiers, I don't let anyone near it! It's unfortunate that you're having a problem with yours, if I could help I most certainly would.