Yankee Dog
Well-Known Member
Posted earlier about a freebie Nikko NR-1015 a coworker gave me. Problem is no am or fm. Unit powers up, everything else works (aux, and phono). Does not go into protection mode. Just no AM or FM. Did a little checking here and there, found a few broken/cold solder joints, but, never got fm/am to work. Reason it died: "Spilled the bong water in it".
Took out a "suspect transistor" on regulator/protector board (at Q801) and tested it per instructions here. All appears fine. The reason I say suspect is the transistor looks to be replaced before. The transistor is a 2sd613 (actual number on transistor is d613). Data is at this link
:http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/6/2SD613.shtml
Anyways, service manual shows up today and it lists a 2sd381 to be used (again at Q801). Data can be read here:
http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/3/2SD381.shtml
So, my question is, did I find the problem? Or at least one step closer? All the other transistors on the board appear to be original and match up to the manual.
Sorry, I am new at this, and looking at the values, it appears it is not a very good match, but I confess, I don't know what the values mean all that well. Just comparing these values, I am hoping it is the wrong component and might be the reason the tuner section is not working? The receiver behaved exactly the same with or without the transistor (q801) in place when powered up.
This is tuner that I decided to throw a few things at it to see if I can get it to live, but, not spend a ton of $$ on. To many things going on, but on the same note, if I can get it up and running with minimal pain, then all the better.
BTW, I believe a suitable replacement for the original 2sd381 would be a MJE15030 (also found by searching on this site). Thanks for your time/effort, and again, sorry, I am new at this, but learning. YD
Took out a "suspect transistor" on regulator/protector board (at Q801) and tested it per instructions here. All appears fine. The reason I say suspect is the transistor looks to be replaced before. The transistor is a 2sd613 (actual number on transistor is d613). Data is at this link
:http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/6/2SD613.shtml
Anyways, service manual shows up today and it lists a 2sd381 to be used (again at Q801). Data can be read here:
http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/3/2SD381.shtml
So, my question is, did I find the problem? Or at least one step closer? All the other transistors on the board appear to be original and match up to the manual.
Sorry, I am new at this, and looking at the values, it appears it is not a very good match, but I confess, I don't know what the values mean all that well. Just comparing these values, I am hoping it is the wrong component and might be the reason the tuner section is not working? The receiver behaved exactly the same with or without the transistor (q801) in place when powered up.
This is tuner that I decided to throw a few things at it to see if I can get it to live, but, not spend a ton of $$ on. To many things going on, but on the same note, if I can get it up and running with minimal pain, then all the better.
BTW, I believe a suitable replacement for the original 2sd381 would be a MJE15030 (also found by searching on this site). Thanks for your time/effort, and again, sorry, I am new at this, but learning. YD