Nad 7155

[pelu]

Hi, i need service manual for NAD 7155.
Someone have them?

Thanks.

 

[Cogsinister]

Welcome to AK..............

 

[RevAmish]

Older NAD manuals are hard to come by. You can find some on HiFi Engine but that model isn't listed.

 

[pelu]

Ok, thanks.
In HiFi Engine found the manual service of power amplifier 2155 but i need the values of these component and not found:
R907 - R927 - C917

If any can help me.

PD: Sorry for my english but i'am from Argentine.

 

[NutBucket]

Are the components you have missing or burned or unreadable? Maybe you can gather the information you need right from the bad parts....

 

[pelu]

This component are not the originals, the equipament have prior ""repair"". One is missing...

 

[NutBucket]

What part of the unit is this? Maybe you can find the values on the other channel?

 

[pelu]

You right, the R927 is part of soft clipping, and be the same of R926.
But the R907 , can be the same resist of the R908 , but this is total clear(Is the green in the picture), the R907 now have two resists in the back side (can see in other picture, the ciurcuit in this area is damage).
The C917 may be the same of C916, i check them.

 

[pelu]

I buy the receiver four months ago, and works fine after five days, and when open discover this repair.....
Now work only one chanel, i think that is the same fail have in this older repair......

 

[NutBucket]

The bigger question is, how it was damaged in the first place.

 

[pelu]

I fix changing the C916.
The C917 not is original and the value is 470uf 50V, is diferent of the C916 (original break now 220uf 35V).
The R908 posible is the original, I test and the value is 578 Ohms (the component don't have any mark).
The R907 have 2 resist pararel 470 Ohm each, I test and have 234 Ohms.
This is very different from the R908
The other components seem to be all original

if you change the C917 and R907 for the same components as the C916 and R908?