Naomi 838-13616 sound amp schematic.

PCB problems and fixes
Post Reply
MonoTekETeA
Please Continue...
Posts: 17
Joined: October 2nd, 2009, 11:50 pm
Location:

Naomi 838-13616 sound amp schematic.

Post by MonoTekETeA »

Hey guys,

I bought a chopped Naomi Uni a year ago, modded for HotD 2. Great little cab. I was having issues with the sound, and found that both of my RCA jacks needed to be reflowed. I fixed those; however, after pulling my board, I noticed that most of it seems to have blown capacitors and corrosion all over. So I was attempting to figure all of the components on the board, but maybe there is a schematic floating around, hopefully?

I contacted sauservice.com over here in the states, and they had nothing for me, so I am now looking on forums, and am about to repair it myself.

I figure that a near brand new board (after replacing most of the components), would be better then a used one. If I can't find the schematic, I will post all of my findings up here...if you have any corrections, feel free, let me know.

The cap list:

C1 – 474 L (.47uF)
C2 – 474 L (.47uF)
C3 – 104 (.10uF)
C4 – 104 (.10uF)
C5 – 100uF 35v
C6 - 474 L (.47uF)
C7 - 474 L (.47uF)
C8 – 100uF 35v
C9 – 104 (.10uF)
C10 – 104 (.10uF)
C11 - 104 (.10uF)
C12 - 104 (.10uF)
C13 – 100uF 35v
C14 – 124L (.12uF)
C15 – 3300uF 35v
C16 –
C17 – 100uF 35v
C18 – 124L (.12uF)
C19 –
C20 – 3300uF 35v
C21 –
C22 – 104 (.10uF)
C23 - 104 (.10uF)
C24 – 47 (.000047uF or 47pF)
C25 –
C26 - 104 (.10uF)
C27 - 104 (.10uF)
C28 – 47 (.000047uF or 47pF)
C29 – 100uF 35v
C30 – 47uF 25v
C31 – 47uF 25v
C32 – 100uF 35v
C33 – 100uF 35v
C34 – 104J 50L or 60L
C35 - 104J 50L or 60L
C36 - 104J 50L or 60L
C37 - 104J 50L or 60L
C38 – 47 (.000047uF or 47pF)
C39 - 47 (.000047uF or 47pF)
C40 – 682J0 (.0068uF 20%)
C41 - 682J0 (.0068uF 20%)

Resistor List (All are 5% tolerance):

R1 – 47k
R2 – 47k
R3 – 10k
R4 – 10
R5 – 47k
R6 – 47k
R7 – 70k
R8 – 10
R9 – 10k
R10 – 22k
R11 – 830
R12 – 22k
R13 - 2.2
R14 – 10k
R15 – 22k
R16 – 830
R17 – 22k
R18 – 2.2
R19 – 100k
R20 – 100k
R21 – 100k
R22 – 100k
R23 – 100k
R24 – 100k
R25 – 100k
R26 – 100k
R27 – 100k
R28 – 100
R29 – 100k
R30 – 100k
R31 – 10
R32 – 10
R33 – 10 (Probably a higher voltage rating)
R34 – 10 (Probably a higher voltage rating)
Last edited by MonoTekETeA on May 15th, 2012, 6:17 pm, edited 1 time in total.
User avatar
chacal
Posts: 117
Joined: January 19th, 2010, 12:49 pm
Location: Thionville (france)
eBay: masacreman

Re: Naomi 838-13616 sound amp schematic.

Post by chacal »

:awe:
Cool Thanks you :thumbup:
MonoTekETeA
Please Continue...
Posts: 17
Joined: October 2nd, 2009, 11:50 pm
Location:

Re: Naomi 838-13616 sound amp schematic.

Post by MonoTekETeA »

Only the ICs, Diodes, and Inductors to do next. If I find time I will draw up a schematic, but that isn't really needed after all this info has been recorded, unless you want to make your own.

-Jeremy
User avatar
Rossyra
Supermod
Posts: 7902
Joined: February 12th, 2009, 1:24 am
Location: UK

Re: Naomi 838-13616 sound amp schematic.

Post by Rossyra »

Tell me...

Does your cab go FOOM! when you switch it on, now that you've replaced components on this amp?
Image
MonoTekETeA
Please Continue...
Posts: 17
Joined: October 2nd, 2009, 11:50 pm
Location:

Re: Naomi 838-13616 sound amp schematic.

Post by MonoTekETeA »

Haven't done any switching yet. I've taken my lunch breaks to break down the PCB, and then I will order the crap after I am done.

Edit: The only thing I expect is for the corrosion to stop spreading and the board to live...hopefully.
User avatar
Rossyra
Supermod
Posts: 7902
Joined: February 12th, 2009, 1:24 am
Location: UK

Re: Naomi 838-13616 sound amp schematic.

Post by Rossyra »

I'd be curious to know, I've had 4 of these amps and they all go FOOM!opretty much 9 times out of 10 when the cab is powered up.

I'm not the only one either.
Image
MonoTekETeA
Please Continue...
Posts: 17
Joined: October 2nd, 2009, 11:50 pm
Location:

Re: Naomi 838-13616 sound amp schematic.

Post by MonoTekETeA »

Lol, I thought you were joking. Okay, I'll let you know.
User avatar
Rossyra
Supermod
Posts: 7902
Joined: February 12th, 2009, 1:24 am
Location: UK

Re: Naomi 838-13616 sound amp schematic.

Post by Rossyra »

Normally I am, on this rare occasion I wasn't :awe:
Image
DJ Long Cat
Posts: 109
Joined: March 28th, 2009, 5:37 pm
Location: St. Louis, MO. USA

Re: Naomi 838-13616 sound amp schematic.

Post by DJ Long Cat »

Anyone know what the Black RCA hookup is for?
User avatar
Rossyra
Supermod
Posts: 7902
Joined: February 12th, 2009, 1:24 am
Location: UK

Re: Naomi 838-13616 sound amp schematic.

Post by Rossyra »

It's a line out for cabs with a separate subwoofer amp (Crazy Taxi. etc).
Image
Post Reply