marcosentino
New Member
Hi everybody, this is my first post and definitely a tricky one
I own a Technics SU-V3 amplifier which had a major fault some years ago.
Thanks to the servicing manual and my electornics skills I was able to figure out what components needed a replacement and I was able to get one of the two channels back working.
In the other channel I still lack the component mentioned in the title of the post: diode MA27A2 (MA26-2) which is mentioned as "1.2V Bias supply" or just "bias supply" in other versions of the manual.
I think this diode provides stability to the bias of the various amplification stages and, when replaced with a generic diode, drives the power amp stage into instability causing the finals (power transistors mounted on the radiator) to blow up when the output power is grater than a few tenths of a Watt.
It would really appreciated if you could help me in figuring out what I could use to replace this part.
Thanks
I own a Technics SU-V3 amplifier which had a major fault some years ago.
Thanks to the servicing manual and my electornics skills I was able to figure out what components needed a replacement and I was able to get one of the two channels back working.
In the other channel I still lack the component mentioned in the title of the post: diode MA27A2 (MA26-2) which is mentioned as "1.2V Bias supply" or just "bias supply" in other versions of the manual.
I think this diode provides stability to the bias of the various amplification stages and, when replaced with a generic diode, drives the power amp stage into instability causing the finals (power transistors mounted on the radiator) to blow up when the output power is grater than a few tenths of a Watt.
It would really appreciated if you could help me in figuring out what I could use to replace this part.
Thanks