Hello,
I have advanced to a point with my TAN-8550 restoration with the help that I have received here and came to a point to pair it with my TAE-8450 but immediately bumped into a problem.
The TAE-8450 is fine on one channel but the other channel stays quiet (barely putting any output) when the volume knob is below 12 o'clock position. When I pass the 12-3 o'clock, it springs back to life and keeps on working a few days till it repeats this problem again. I looked high and low for a relay but this device does not have one. Before going medieval, do you have a pointer for me, on where to start checking? It looks like a semiconductor issue to me and bought all the necessary transistors, yet, I would hear from you to have a more educated or methodical approach.
Thanks in advance
Dirk
I have advanced to a point with my TAN-8550 restoration with the help that I have received here and came to a point to pair it with my TAE-8450 but immediately bumped into a problem.
The TAE-8450 is fine on one channel but the other channel stays quiet (barely putting any output) when the volume knob is below 12 o'clock position. When I pass the 12-3 o'clock, it springs back to life and keeps on working a few days till it repeats this problem again. I looked high and low for a relay but this device does not have one. Before going medieval, do you have a pointer for me, on where to start checking? It looks like a semiconductor issue to me and bought all the necessary transistors, yet, I would hear from you to have a more educated or methodical approach.
Thanks in advance
Dirk
I think it is a good call Citizen124032. Thanks
There was noise in one of the 2SA705 in the phono circuit and I have noticed that the noise was emerging after a delay once the premaplifier is turned on, but I was not hearing a relay click. I have some spare 2SK43s, I will give it a shot.
There was noise in one of the 2SA705 in the phono circuit and I have noticed that the noise was emerging after a delay once the premaplifier is turned on, but I was not hearing a relay click. I have some spare 2SK43s, I will give it a shot.
More thoughts: bad gate soldering, the obvious checks of electrolytes, switches, connectors, potmeters on this board.
A fast check by disconnecting pin 1 of connector 2 and fix it to pin 2 of connector 3. It forces the fets to pinch off (same as the mute control line, -26V is sufficient). If the problem remains, it's closer to those one of those fets.
A fast check by disconnecting pin 1 of connector 2 and fix it to pin 2 of connector 3. It forces the fets to pinch off (same as the mute control line, -26V is sufficient). If the problem remains, it's closer to those one of those fets.