Power Supply "Playing" To Rebuild It And Related "Knots" To Untie

Hi everybody ,

"Playing" to rebuild a copy of a psu  ,
and some " knot " to untie…

first of ,
the value of 2 inductors ,
showed in the attached image
(if the server system allows  the load)

the "code" on the "head" mean the value ?

a relative schematic will be posted a.s.a.p
(as ready)

thanks in advance for any post about !
cheers

222 probably means 2200uH and 221 would be 220uH. L is probably a tolerance of some sort. But it doesn't tell you current and you'll need to know that. The bourns high Q shielded radial inductors would probably be good for that.

squarewave said:

22 probably means 2200uH and 221 would be 220uH. L is probably a tolerance of some sort. But it doesn't tell you current and you'll need to know that. The bourns high Q shielded radial inductors would probably be good for that.

Click to expand...

Agreed 222 is most likely 2200uH and 221 is 220uH

Much thanks for post !!

so the psu have 1 section with TL783 (V Reg) and 2 other sections with LM317 (V Reg) ,
in attached the TL783 section scheme got from psu "source" ,
the bigger inductor with "222" info is the one near the out ,
there are also a diode and some resistor that the value have to be verified ,

any post/help about is welcome ,

while the schematic of other 2 psu sections are ready for post ,

cheers

update

next to end the scheme with other 2 LM317 sections

at the moment trimmer value to get…

it can be 100k ?
(as it have 104w code on the head ..)
check attached

cheers

104 is 100K

user 37518 said:

104 is 100K

Click to expand...

Thanks for post user 37518 !

so ,
finally had a bit of time to proceed with checking and "decoding" the psu board ,
it have 3 section ,

the first with TL783 have 2 inductors ,
the other 2 sections with LM317 have only 1 inductor ,

i checked various ac to dc psu schemes here on the groupdiy ,
but not found 1 with inductors ,
there is any specific reason why put them on a power supply ?

in attached the scheme about ,
(in the scheme sections 2 and 3 have a small value cap , with the + pin not connected ,
because still not checked where it is soldered , soon an update about)

any info-help about is welcome ,
thanks in advance , as always .

Finally had a bit of time o go on
and updated-extended the schematic on out section

a positive pin connection of small cap
(2 caps , 1 on section 2 and 1 on section 3, same position for all in the scheme)
still need to be confirmed

as on attached schematic

found a "strange" thing
the positive (+) pole of the section 3 out
connected to the negative (-) poles of section 1 and 2
as on the image