Hi all! I try to restore one beautifull for me NAD 3020 A. I have for the moment the NAD3020 schematics from Geoff Moss and the NAD3020E schematics from edl,but my amplifier is different.I post a picture of my 3020A.I have NEED of any correct parts list or correct schematics for 3020A ,because for the moment I have only one very clear PCB without many orriginal parts.If I can help with any information will be great.I want restore my amp like new,but I have this very big problem may be from 5-6 days and I can`t work with the amp in future without any information.
Thank`s!
Thank`s!
Attachments
I know,because Mr Google say me,but I can`t buy this manual ,because I can`t pay it from Bulgaria or because this site can`t ship for me in my country.I know more online shops with this manual but I can`t buy it from my country 
Guys I want only any simple schematics or the parts list. I know that anyone can help me with this ,but may be for $.
If anyone have a heart of gold in the our board I know that can help me and can`t stop waiting this salvage post
Guys I want only any simple schematics or the parts list. I know that anyone can help me with this ,but may be for $.
If anyone have a heart of gold in the our board I know that can help me and can`t stop waiting this salvage post
Greetings from Norfolk
Is the PCB single sided, it appears so from the phot. If so, you could make a photo copy of the trackwork, and then draw in the components, then develope the circuit diagram from this.
I have done it a few times, and had near complete sucess.
Richard.
Is the PCB single sided, it appears so from the phot. If so, you could make a photo copy of the trackwork, and then draw in the components, then develope the circuit diagram from this.
I have done it a few times, and had near complete sucess.
Richard.
Gandalph,thanks,but now I have problems with my digital camera- Fujitsu.If I can try to make any photos may be this monday,but I `am not sure for this.I can try to find any coincidences with my amp and the original 3020,but I`am sure thet anyone have the correct schematics ,but he can help me only for $. 
ZuMbAiU said:
Maybe planet10 can help you.
He has a lot of old stuff.
I wouldnt be surprised, if he had that version scheme.
Send him a message/mail or contact him via his website: http://www.t-linespeakers.org/
🙂
derguteton,thanks but I have the schematics for the original 3020 from Geoff Moss on paper.
Now I must mail to planet10 for any schematics ,because this is my last hope for this amplifier.
Now I must mail to planet10 for any schematics ,because this is my last hope for this amplifier.
Guys.,...the problem is there are many NAD3020-versions:
3020
3020A
3020B
3020e
3020i
there are some differences between them, especially the phono stage (mm / mc), preamp .. impedance switch, mute switch mono switch or loudness switch..
I have found schematics of most of them .. .. but not for the 3020A ..
having just acquired a NAD3020A i would be highly interested in the NAD3020A(!) schematic
The NAD3020A features:
phono stage with MM/MC switch
loudness switch, mono switch (no ! mute switch)
no impedance switch
power indicator leds (1-5-10-20-35 Watt)
Who can help us?
3020
3020A
3020B
3020e
3020i
there are some differences between them, especially the phono stage (mm / mc), preamp .. impedance switch, mute switch mono switch or loudness switch..
I have found schematics of most of them .. .. but not for the 3020A ..
having just acquired a NAD3020A i would be highly interested in the NAD3020A(!) schematic
The NAD3020A features:
phono stage with MM/MC switch
loudness switch, mono switch (no ! mute switch)
no impedance switch
power indicator leds (1-5-10-20-35 Watt)
Who can help us?
ZuMbAiU said:
Thanx to Apple incrasing storage space to a GB & the high demand for this, the NAD 3020 service manual now lives here
http://p10hifi.net/planet10/manuals/NAD_3020_ServiceManual.pdf
as mentioned there are quite a few versions of the 3020 -- this is the 1st one.
Also perhaps an aid is the 7020 manual
http://p10hifi.net/planet10/manuals/NAD7020early_servMan.pdf
the only references to the insides of a 3020A i have is this picture (shrunk to fit here -- i can mail a larger one if it will be useful)
dave
Attachments
Thx planet10 !
Could you send the large picture to t_schrama@hotmail.com ?
Looks like and interesting comparison.
BTW
I have the 3120 (simmilar to 3020B) schematic which also has the mm/mc switch like the 3020A which the early 3020 and the later 3020e or 3020i lacks.. but the preamp section is very different from the realy 3020 version .....maybe the 3020A is more like the 3120/3020B than like the early 3020 ?
Could you send the large picture to t_schrama@hotmail.com ?
Looks like and interesting comparison.
BTW
I have the 3120 (simmilar to 3020B) schematic which also has the mm/mc switch like the 3020A which the early 3020 and the later 3020e or 3020i lacks.. but the preamp section is very different from the realy 3020 version .....maybe the 3020A is more like the 3120/3020B than like the early 3020 ?
Thanks Planet10.I have a good pictures of the 3020A PCB - 2048x1536 pixels. If I can help with this pictures?
And I think that my 3020A is more like the 3020B,but I can`t find any schematics with any connection with the A model.
When I think that I have any correct schematics I have many errors - I dump the old parts from my NAD and now I can`t find the correct parts for this PCB.🙄
Planet10 can you help with any 3020B schematics if you can`t help us with the 3020A schematics?
I don`t know but may be anyone in Vintage Audio Manuals can help us with any schematics in PDF files or may be only with the parts list gratis?I can try with 1-2 mails?
May be anyone can help me to come out of a dead-lock?
And I think that my 3020A is more like the 3020B,but I can`t find any schematics with any connection with the A model.
When I think that I have any correct schematics I have many errors - I dump the old parts from my NAD and now I can`t find the correct parts for this PCB.🙄
Planet10 can you help with any 3020B schematics if you can`t help us with the 3020A schematics?
I don`t know but may be anyone in Vintage Audio Manuals can help us with any schematics in PDF files or may be only with the parts list gratis?I can try with 1-2 mails?
May be anyone can help me to come out of a dead-lock?
OK i dug a bit deeper and i have these:
Big compare
http://p10hifi.net/planet10/manuals/NAD_compare.jpg
3020B map
http://p10hifi.net/planet10/manuals/3020b_schematic.gif
3020i map
http://p10hifi.net/planet10/manuals/3020i_schematic.gif
dave
Big compare
http://p10hifi.net/planet10/manuals/NAD_compare.jpg
3020B map
http://p10hifi.net/planet10/manuals/3020b_schematic.gif
3020i map
http://p10hifi.net/planet10/manuals/3020i_schematic.gif
dave
As an aside, why do NAD say to parallel the 0R22 emitter resistor (R654) with a 1k before bias adjusting? 😕
An externally hosted image should be here but it was not working when we last tested it.
Dave you are the best for me.I think that my 3020A is like the 3020B.
Now will be great if you can find the parts list for the 3020B.
All capacitors in my 3020A are identicals with the 3020B capacitors. This is great.
Now will be great if you can find the parts list for the 3020B.
All capacitors in my 3020A are identicals with the 3020B capacitors. This is great.
Dear all,
is any body can help me to share the cct schematic for NAD 3020A, which is facilitated with MM & MC. Please kindly send to my email: fgani43@gmail.com
is any body can help me to share the cct schematic for NAD 3020A, which is facilitated with MM & MC. Please kindly send to my email: fgani43@gmail.com
Hi Dave,
Sorry if I press you again, and many thanks for your response. From the communications between you and the other communities it were touched on that the cct schematic 3020A is the same as 3020B, but "explicitly" this is not so clear for me. Could you make me sure that those two are the same (from yourself as an expert)?. If it is not, I really need the cct schematic for the "A" type.
Sorry if I press you again, and many thanks for your response. From the communications between you and the other communities it were touched on that the cct schematic 3020A is the same as 3020B, but "explicitly" this is not so clear for me. Could you make me sure that those two are the same (from yourself as an expert)?. If it is not, I really need the cct schematic for the "A" type.
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