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**willawake** · 10-09-2007, 11:46 AM

Re: Intel D915PBL

imho its fine

- intel are usually using 85oC caps in non critical areas of the board.
- i guess you have a full row of polymer caps ie oscon sepc and chemicon psa by the cpu
- the nichicon affected were only 105oC HN and HM series and yours are 85oC I guess they are VR or something.
- some chemicons, some rubycons

what more you want? attach a seasonic to it and ur good to go

**starfury1** · 10-09-2007, 12:08 PM

Re: Intel D915PBL

well the others round here are bit more familiar with the brands and series's

Since (except for the polymers, I dont know) they all look like good brands I would say that they should be fairly ok for a reasonably long life.
SMG SME not sure on them. (possible a GP from the same stable as KZE)

the 85 C caps are most probably of the General Purpose variety and that fine if being used in those types of positions

The caps that usually cop the worst workout are the VRM caps
(and probably thats were the polymers are being used)

Fromm what I understand 470uf and below you don't need to worry about

I suspect since the caps are of quality they are being used in the right positions for there intended purpose, so you should have no dramas

I am of the opinion if its works Id leave it alone
but yeah there is alway room for improvement and I am not 100% sure on this

so lets see what others think

Cheers

Are will you bet me but yeah...me too.... think it will be fine

**willawake** · 10-09-2007, 12:27 PM

Re: Intel D915PBL

Are will you bet me but yeah...me too.... think it will be fine

hehehe i hate it when that happens to me or even worse to end up on the next page all alone

its not really an overclocking board.

but if we consider anyway, one thing that could be done is replace
5 of KZE 16V 1200uF 10mm dia, Height 25.4mm, 105 deg C

which are probably on the 12v in, with a lower esr brand.

difficult to say about the rest without seeing a diagram. but yeah i dont think its worth messing with a decent set of caps unless its some balls to the wall overclocking project

**JEWilson** · 12-02-2007, 06:19 AM

Re: Intel D915PBL

Eventually got round to replacing the +12V rail caps in this mobo.

I'm frustrated on, of all things, the last cap on the positive pole which refuses to come out of this mobo.

When I was removing the KZEs, I used a technique where first,
the negative pole was lifed a bit, then the positive, then the negative
and so on until the caps come out.

I always use this technique for removal.

The last cap (isn't it always) pole on the positive side refuses to budge and
now I'm in a position where a fragment of the cap positive pole is left in the
via remains and will not come out!

I've tried solder braid, needle method, solder pump - nothing works!

Any suggestions? I do not want to damage the mobo.

Thanks

**Super Nade** · 12-02-2007, 06:49 PM

Re: Intel D915PBL

I would suggest a generous dab of solder to get the leg out. The hole can be easily cleaned if it is filled with solder as opposed to a thin layer blocking the center of the hole.

**gdement** · 12-03-2007, 05:06 AM

Re: Intel D915PBL

Yeah, when that happens I just melt the solder and pull the leg out with pliers. Add more solder if you can't get it to melt.

**Super Nade** · 12-03-2007, 07:56 AM

Re: Intel D915PBL

And, do not yank out the legs, odds are you will rip the thermal pad out as well..

**JEWilson** · 12-03-2007, 08:18 AM

Re: Intel D915PBL

I been here before - you need to be patient to do this without damaging
the board

Just a thought - it may be my iron is a bit cold. Never had a problem before though.
I've seen Willawake details use of temps for cap removal and cap replacement

I use a 50W Antec TCS at the mo. It is wired but you can adjust the
temp from 200 to 450 C +/- 1 %.

What temps are acceptable? Would like to make sure.

**Super Nade** · 12-03-2007, 10:08 AM

Re: Intel D915PBL

Just make sure your tip is big enough. Fine pointy tips don't work as well as a chisel tips.

**JEWilson** · 01-01-2008, 03:32 PM

Re: Intel D915PBL

Ok

Patience has been exercised and the cap removal for the final
problematic one has been resolved! - yeh.

Q - whereas most modern boards are built to a cost, esp. with
caps, what of the case where caps silk screen show cap
placement and have associated vias but are left unpopulated?

As example, this particular mobo had room, for what I believe to
be for two more OSCONs at the CPU VRM. I knew this as;
1. They were physically located at CPU VRM and
2. They were electrically in parallel with the other OSCONs in situ as well as;
3. They silk screen decals re - cap numbers were the same series.

So far as that was the case for the OSCONs, I added another Panasonic FM
16V 1200uF to the +12V rail over and above the former 5 KZEs
as the mobo, again, could cater for this give the three conditions above.

Is there any inherent danger in doing this?

**davmax** · 01-01-2008, 04:03 PM

Re: Intel D915PBL

I am curious how the Oscons have surfaced, not in the original list.

Extra caps can be inserted without any real hazard. All parallel connected caps share ripple current therefore should be of the same part number so that sharing is at best. I note that you added an FM with KZEs.

Oscons are recommended to be replaced.

**JEWilson** · 01-01-2008, 04:19 PM

Re: Intel D915PBL

Perhaps I was not clear - sorry bout that

There were 5 KZEs on the +12V rail.
There was room for another but this was not populated on the mobo.
Therefore, replaced 5 KZEs with 6 Panasonic FMs - same values

I was of the opinion, the Alu OSCON SEPC 560uF 4V were good caps.
These are supplied by Sanyo. See further;
http://www.edc.sanyo.com/english/pro...n/outline.html

These was originally listed as 8 Alu caps at CPU VRM.
As a further two caps were made available but were not populated,
I added a further two Alu OSCON SEPC 560uF 4V.

I replaced the Alu A 4DT 560 4V cap beside the PCI-Express slot
with a further Alu OSCON SEPC 560uF 4V

Thanks for the advice on populating free (linked) vias

**PCBONEZ** · 01-01-2008, 04:42 PM

Re: Intel D915PBL

I'm not 100% clear on what you are doing but here are some comments.

Panny FM are rated for higher ripple and are lower ESR that KZE by a good margin so you might have gotten away with using 4 FM's.
(You went in the safe direction though so don't worry.)

They don't usually mix OSCON and Electrolytic in parallel with each other.

If you are putting those 4v OSCON on any voltage greater than 4v they are going to live a very short life. Possibly minutes.

The unoccupied cap positions are left over from the reference (design) board.
After they build and test the prototypes they may decide the other caps aren't needed but they don't change the PCB.
There are a few valid reasons they will leave them there.
-
It costs money to re-do the silk screens and reprogram the CNC machine that drills the holes in the PCB.
-
It leaves them more options in parts procurement.
-
It leaves the board open to later revisions that might support faster CPU's (that will need more caps) without re-engineering the PCB.

.

**davmax** · 01-01-2008, 04:56 PM

Re: Intel D915PBL

My mistake. Oscon are perfectly fine. Mistook for a bad brand starting with O.

**JEWilson** · 01-01-2008, 06:46 PM

Re: Intel D915PBL

PCBonez

Agreed - I was aware of the reasons why mobos are produced this way
Just a check with other forum members views

As to the matter of recap
The OSCONS and lytics are not in parallel, perhaps I did not make this clear

Apologies

**PCBONEZ** · 01-01-2008, 07:39 PM

Re: Intel D915PBL

Just an FYI: The SME and SMG are chemi-con 85c caps.

SME is discontinued and was replaced by SMG

.

**JEWilson** · 01-07-2008, 12:17 PM

Re: Intel D915PBL

Ok,

Finally got round to firing this board up.
News - it powers up ok and I am currently testing memory.
Note I am running Memtest 86v3.3 in VGA mode.
Running test 5 and 8 for 20 iterations.

One issue however.
The graphics display and screen have tinged the formerly, white text, green.
The PCI-E adapter is an R37L-SC3B 128MB Graphics (ATI X300 based).
As I recall from my basic TV servicing, green tints are a sign of ripple distress
with a CRT.

I'm running the screen from the vga port of the adapter.

So far as I have recapped this board as described, would that project
necessarily effect the CRT or, alternatively, is it a sign the adapter is
about to give out?

Any advice/insight appreciated - thx

**PCBONEZ** · 01-07-2008, 06:18 PM

Re: Intel D915PBL

Take a look at the caps on the video card.
They go bad too.

Does the monitor work properly on another system?
If not it may be the problem.

Verify that your monitor is compatible with the frequency settings the card is running at. [Not usually a problem since plug'n'pray but once in a while it happens.]

.

**JEWilson** · 01-08-2008, 02:02 AM

Re: Intel D915PBL

Must be the CRT or the vga cable as the mobo and graphics adapter
work ok with another CRT

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