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#276312 - 2018-05-24 14:05 DSP5200 non-SL recap
Registered: 2008-10-11
Posts: 473
Tarik Offline
Paranoid android
Tarik Offline
Paranoid android

Registered: 2008-10-11
Posts: 473
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
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#276329 - 2018-05-24 20:17 Re: DSP5200 non-SL recap [Re: Tarik]
Registered: 2004-04-15
Posts: 12,505
VirusKiller Offline
Don't Panic
VirusKiller Offline
Don't Panic

Registered: 2004-04-15
Posts: 12,505
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.


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#276331 - 2018-05-24 21:20 Re: DSP5200 non-SL recap [Re: Tarik]
Registered: 2004-10-20
Posts: 1,480
GMT Offline
Working on the ultimate question
GMT Offline
Working on the ultimate question

Registered: 2004-10-20
Posts: 1,480
Loc: Cambridge, Cambs, UK
Nice work Tarik - What are you going to do with it?

Cheers
Tom


Main: G61 SL, 218 HD621, 2* 7200SE, 5200HC, DSW,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: 473
Tarik Offline
Paranoid android
Tarik Offline
Paranoid android

Registered: 2008-10-11
Posts: 473
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
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#276337 - 2018-05-25 06:32 Re: DSP5200 non-SL recap [Re: GMT]
Registered: 2008-10-11
Posts: 473
Tarik Offline
Paranoid android
Tarik Offline
Paranoid android

Registered: 2008-10-11
Posts: 473
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

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#285434 - Yesterday at 18:51 Re: DSP5200 non-SL recap [Re: Tarik]
Registered: 2012-10-31
Posts: 73
Gwho Offline
Mostly harmless
Gwho Offline
Mostly harmless

Registered: 2012-10-31
Posts: 73
Loc: Fountain Hills, Arizona, USA
Tarik,

I read this thread with great interest. I might want to try the recap and/or resistor replacement in the future as I have been having a problem with my 5200s. Do you have a parts list of what you replaced? Also, did you get a schematic of the circuit so you can check voltages?

Excellent work!

Regards,
Gary


861v4, HD621, DSP5200s, DSP5000C, SBT, Samsung 4k Blu-ray
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#285436 - Today at 07:05 Re: DSP5200 non-SL recap [Re: Gwho]
Registered: 2008-10-11
Posts: 473
Tarik Offline
Paranoid android
Tarik Offline
Paranoid android

Registered: 2008-10-11
Posts: 473
Loc: Gloucestershire, UK
PM sent.


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

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#285437 - Today at 08:58 Re: DSP5200 non-SL recap [Re: Tarik]
Registered: 2016-06-05
Posts: 163
Koputai Offline
Hitchhiker
Koputai Offline
Hitchhiker

Registered: 2016-06-05
Posts: 163
Loc: Collaroy Plateau, NSW, Austral...
Thanks for the info Tarik.

In that last photo, you can really see the damage to the PCB under the power resistors.

I'm thinking it might be worth the effort to raise and separate the four resistors to get some of the heat away from the board.

Here in Australia, in summer the rears of my DSP5200SL's get very hot, so I'm considering adding a heatsink to the rear across the output devices to get some heat away as well.

Cheers,
Jason.


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Storage: DSP5000HC, DSP3100HC x2, DSP3300, G98, G56, G68ADV, 504, 562v1, 562v2, 568, 598, AC11, and enough spare parts to sink a battleship.
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