LM4780 - ouput = 4.4v - PB! HELP!

[aceditnanar]

Hello,

I did two parallel LM4780 board like audiosector, and I have made the same schematic and the same composants, but when i put the current, i have 4,4v on the 2 outputs.. so it's a pb of composants? no?
(with the pcb of pinkmousse)

you can see my topic, and my schematic... I don't know what i must do now... 🙁
what is pb.??

help please..

http://www.homecinema-fr.com/forum/viewtopic.php?p=169927311#169927311

thanks a lot for your help...

 

[Netlist]

Does the offset disappear with a dummy load as suggested at the other forum?
Also, measure every resistor and confirm their value is correct.

/Hugo

 

[aceditnanar]

ok, tank you, when I have a resistorI put it..

but this offset is not good normaly...
no?
I confirm that all resistors have good values

thank's for this suggestion...

others?

 

[aceditnanar]

does somebody know from where that can come? a value which influences the output in an abnormal way? thank you

 

[Wynand]

Can you maybe post a picture of your pcb so we can see?

 

[aceditnanar]

yes, I post a picture this evening... 😉

 

[aceditnanar]

hello everybody

It' was just a pb of starground and my input wasn't connected to the ground to test my systeme...

with my new start, I have 2.2mv and on the other board, 19.2mv...

it's all right...

I post my picture when I could..
and i want to changed my post to a post of my GC 😉

by