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#276312 - 2018-05-24 14:05 DSP5200 non-SL recap
Registered: 2008-10-11
Posts: 408
Tarik Offline
Hitchhiker
Tarik Offline
Hitchhiker

Registered: 2008-10-11
Posts: 408
Loc: Gloucestershire, UK
Just finished doing a full capacitor refresh/service on a DSP5200 electronics panel (amp and DSP boards) which I believe to be a 2005 model. There has been a lot of discussion with respect to DSP5000, but my first impression is that early DSP5200 could benefit from a capacitor refresh/service. I've got two more speakers to do, so will report back my findings

Brief observations:

1) There was heat damage to the PCB behind the power resistors, but no damage to the resistors or the PCB tracks. See the black discolouration on the PCB in the image (not the shadow).



2) There appears to be signs of heating to some of the smaller capacitors. The closer the power end of the board the more discolouration to the cases. This is likely to affect the component value although I have no way of measuring them to confirm. I have included new caps in the picture with the long leads, for a colour reference. All the caps in the picture were the same series and therefore the same colour when new.



Image of the finished board.



Lounge: DSP5200, 518
Snug: DSP33 x 5, 518, C61R
Office: M33, 561

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#276329 - 2018-05-24 20:17 Re: DSP5200 non-SL recap [Re: Tarik]
Registered: 2004-04-15
Posts: 12,370
VirusKiller Offline
Don't Panic
VirusKiller Offline
Don't Panic

Registered: 2004-04-15
Posts: 12,370
Loc: nr. Milton Keynes, UK
Great job Tarik!

I have rather mixed feelings about this: the extent of the deterioration and thermal damage isn't great, but the repairability is.

Do you have any thoughts on the longevity of chips and surface mount components (in general in all products)? If repair comes down to replacing caps and resistors and thermistors etc., that's all doable, but some of the other stuff probably isn't.


Roon Developer and ex-moderator of this Forum
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#276331 - 2018-05-24 21:20 Re: DSP5200 non-SL recap [Re: Tarik]
Registered: 2004-10-20
Posts: 1,446
GMT Offline
Working on the ultimate question
GMT Offline
Working on the ultimate question

Registered: 2004-10-20
Posts: 1,446
Loc: Cambridge, Cambs, UK
Nice work Tarik - What are you going to do with it?

Cheers
Tom


Main: G68J, 218 HD621, 3*5200s (2 SE L&R),DSW, 2* Reviver, 3200s,SBT, PS4, Amazon TV Fire, Dune Base 3.0, Xbox, NUC (Roon server & Kodi)
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#276336 - 2018-05-25 06:29 Re: DSP5200 non-SL recap [Re: VirusKiller]
Registered: 2008-10-11
Posts: 408
Tarik Offline
Hitchhiker
Tarik Offline
Hitchhiker

Registered: 2008-10-11
Posts: 408
Loc: Gloucestershire, UK
I'm not an expert, so cannot comment on the effect on the chips and surface mount components. I was mostly coming at this from a sound quality perspective, the capacitors have been exposed to enough heat to change the colour of the packaging so my assumption is that they cannot be as good as the day they were installed.


Lounge: DSP5200, 518
Snug: DSP33 x 5, 518, C61R
Office: M33, 561

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#276337 - 2018-05-25 06:32 Re: DSP5200 non-SL recap [Re: GMT]
Registered: 2008-10-11
Posts: 408
Tarik Offline
Hitchhiker
Tarik Offline
Hitchhiker

Registered: 2008-10-11
Posts: 408
Loc: Gloucestershire, UK
Hi Tom,

No plans, it’s fulfilled its purpose so will now just clutter up my office. I built up my knowledge fault finding it to make it work, turned out to be a voltage regulator. Also used it to practice doing the capacitor refresh before I start on my pair.


Lounge: DSP5200, 518
Snug: DSP33 x 5, 518, C61R
Office: M33, 561

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