 Posted: Thu Jan 07, 2010 10:45 pm Post subject: |
|
| Sounds like there is still a load on the supply line and if the diodes check Ok and there are no problem with diodes or electrolytics, more than likely you have blown outputs; Q415/416 Q417/418 &/or predrivers Q411thru414-- possibly more? | |
| Posted: Wed Jan 06, 2010 4:53 am Post subject: This is exactly my problem |
|
| That's it
Now I replaced the cap but noticed the 4 fuses were blown, replaced them and still the ones going to the 8 ohms blew again. where could the problem be? I measured the diodes andd seem ok. What else should I do and measure? |
|
| Posted: Mon Jan 04, 2010 4:00 am Post subject: Re: NAD 3225pe cap c511 needed |
|||
Same as C510, C512 .1 microfarad 50 V. (not critical for type, you can use ceramic, polypropylene etc)  |
|||
| Posted: Sun Jan 03, 2010 8:20 pm Post subject: NAD 3225pe cap c511 needed |
|
| Hi,
I have a NAD 3225pe and have the c511 burned (between the two main big caps ) do you have the circuit for that one? Need to know the size Thanks, Dan |
|
| Posted: Wed Dec 17, 2008 4:25 pm Post subject: NAD amp |
|
| Thank You so much!!!
That was exact what I needed. Greetings from Vienna LackyLo P.S. So great that there is an internet.... |
|
| Posted: Tue Dec 16, 2008 5:19 pm Post subject: |
|
| There are two BD139's one of which seems to be on a heatsink Q409
here's the final stage.---(Btw, you may want to check all the surrounding components as there may be others).  |
|
| Posted: Mon Dec 15, 2008 7:54 pm Post subject: NAD 3220PE |
|
| Thanks for your try to help me!
Seems the driver circuit for the power trans driver trans BD 139 collector resistor and trans 2SD669A emiter resitor... pehaps you have an idea? greetings LackyLo |
|
| Posted: Sun Dec 14, 2008 5:18 pm Post subject: Re: Service manual NAD 3220PE amplivier |
|||
I think there were some similarity between those units....I have a 3225PE/3020I Perhaps it just may be similar to what you have? What resistors are you looking for on what circuit? |
|||
| Posted: Sun Dec 14, 2008 12:07 pm Post subject: Service manual NAD 3220PE amplivier |
|
| Hello
Can anyone help me with a service manual or electric circed diagram for an NAD 3220PE amplivier? Need it for finding out the value from 2 burned resitances. Thanks and good times for you all |
|