Hello everyone,
This is my first post here, and my son recommended it as a place where I might well get help.
I am in the process of refurbishing a Teac 4010GSL open reel tape recorder, and I've finished up everything except for the problem I mention in the title of the post. My son, Bjorn, who is much more electronically educated than I am (which doesn't mean too much, since I'm not very savvy at all), went through the circuit with my oscilloscope, and he concluded that the problem is with the transformer in the circuit. He could find the audio signal up to that component, but not beyond. We carefully checked the connection from the headphone receptacle to the transformer and found it complete. He says that he's moderately sure that the transformer is where the problem is, but as he is young and self-taught, he's not positive. I've attached a copy of the circuit, as well as two images -- one showing the components themselves on top of the board, and the other, showing the connections under the board. 'G' stands for the ground wire from the receptacle; 'R' is the right channel connection; and 'L' is the left channel. t1 and t2 are the only places where I found continuity between the right channel wire and anywhere on the board. They are both on one side of the transformer, and one. t2, is not even being used, as can be seen in the image (the corresponding pin on the transformer for the left channel is also unused).
The questions I have are,
1) From what I've described and shown, can anyone add an opinion about whether we are (or could be) right about our conclusion?
2) Are there other suggestions for what we should do to figure this out?
3) I wondered if just getting a small transformer with the same specs as this one would work, but Bjorn said that the pin layout might be different and he is not knowledgeable enough about them to know how to check. Any thoughts on this would be appreciated.
And 4) can anyone suggest where we might find this particular transformer? It is Teac part number 50562140. The number stamped on top seems to be 56214 - 1 (see the photo). I plan to call Teac tomorrow to ask if they still stock it, but if there are folks here who know something (eg: they don't stock it, or where a good source for such things is), I'd be grateful to know.
Thanks!
This is my first post here, and my son recommended it as a place where I might well get help.
I am in the process of refurbishing a Teac 4010GSL open reel tape recorder, and I've finished up everything except for the problem I mention in the title of the post. My son, Bjorn, who is much more electronically educated than I am (which doesn't mean too much, since I'm not very savvy at all), went through the circuit with my oscilloscope, and he concluded that the problem is with the transformer in the circuit. He could find the audio signal up to that component, but not beyond. We carefully checked the connection from the headphone receptacle to the transformer and found it complete. He says that he's moderately sure that the transformer is where the problem is, but as he is young and self-taught, he's not positive. I've attached a copy of the circuit, as well as two images -- one showing the components themselves on top of the board, and the other, showing the connections under the board. 'G' stands for the ground wire from the receptacle; 'R' is the right channel connection; and 'L' is the left channel. t1 and t2 are the only places where I found continuity between the right channel wire and anywhere on the board. They are both on one side of the transformer, and one. t2, is not even being used, as can be seen in the image (the corresponding pin on the transformer for the left channel is also unused).
The questions I have are,
1) From what I've described and shown, can anyone add an opinion about whether we are (or could be) right about our conclusion?
2) Are there other suggestions for what we should do to figure this out?
3) I wondered if just getting a small transformer with the same specs as this one would work, but Bjorn said that the pin layout might be different and he is not knowledgeable enough about them to know how to check. Any thoughts on this would be appreciated.
And 4) can anyone suggest where we might find this particular transformer? It is Teac part number 50562140. The number stamped on top seems to be 56214 - 1 (see the photo). I plan to call Teac tomorrow to ask if they still stock it, but if there are folks here who know something (eg: they don't stock it, or where a good source for such things is), I'd be grateful to know.
Thanks!