MSI 815M Pro V5.1 (MS-6315) Recap

[Pauln]

I have a MSI 815M Pro V5.1 (MS-6315) that I would like to recap due to 8 bulging caps (can post a picture if needed) It's an old Piii board.
I have done the odd cap swap from another board but never a full recap.
ATM board is working but only tested to BIOS.

Caps I intend to replace but I am a little unsure if I have picked correctly ( I have tried searching and looking at ripple and ESR but I am a little lost )

2 No Teapo SM105c 6.3v 1000uF (D 8mm x H 15mm 3.5mm legs) [Panasonic FR 6.3v 1200uF (same size and height )
14 No G-Luxon ~LZ105c 1084(m) 6.3v 1000uF (D 8mm x H 14/15mm 3.5mm legs) [Panasonic FR 6.3v 1200uF (same size and height )
5 No Teapo SM105c 6.3v 2700uF (D 10mm x H 25mm 5mm legs) [Panasonic FR 6.3v 2700uF (same size and height )
3 No Lelon RXA105c L136(m) 10v 1500uF (D 10mm x H 20mm 5mm legs) [Panasonic FR 10v 1800uF (same size and height )
I could find any data on the Lelon as that size seemed to be 1200uF

Also on the board (unsure if I need to change any advice would be welcome)
1 No Fujitsu 105c-55c M10267 4v 560uF (D 8mm x H 15mm 3.5 legs) Can not really read this properly but assume its Fujitsu from searching.
13 No Surface mounted 10/16G/105 (D 4mm x H 5mm)
1 No Surface mounted 22/16G/169 (D 5mm x H 5mm)

Paul

[stj]

that fujitsu 4v cap could be polymer - post a picture.
for surface-mount i try to use tantalum.
voltage for tantalum should be atleast double the actual voltage on the tracks - so check if any are on the 12vrail.

[Pauln]

Thank you for reply
I had assumed it was a polymer and from my searching they seem to last.
When say tantalum do you mean surface mount ( like SMD ) or solder legs to the pads ( I assume its probably best to change all the caps on the board )
Are the Panasonic FR a good replacement for the other caps ?

There is surface mount next to CPU fan and case fan header so I assume these are on the 12v rail ( IIRC Pentium 3 need 3.3 and 5v more than 12v )


Paul

[stj]

yes, surface-mount tantalums.
they can be tricky to solder because they are often the same spacing as the pads, but because the end contacts fold under them you can solder them down.
i use a knife-style tip for doing that.

[Pauln]

The only ones I can find with 25v and 10uF seem to be 6mm long. I can find some SMD Aluminium Electrolytic Capacitor surface mount (Panasonic S-Series ) that seem to be "Like for like"

Thank you for the help
Paul

[momaka]

Are the Panasonic FR a good replacement for the other caps ?

Yup, Panny FR's should be just fine for any Pentium 3 board.

The Fujitsu cap is likely from their function polymer (FP) family, and unlikely to be bad (I've seen a few of these fail, but only when heavily abused from heat and/or physically.)

DON'T replace the small SMD electrolytics with Tantalums! A few of these are likely for the audio circuits, and that's once place where Tantalums don't belong.
If it was my board, I probably wouldn't bother to replace any of these smaller (100 uF and under) caps.

[Pauln]

Thank you I will get the FR's and report back.

Paul

[Pauln]

Thank you for your help
I have not done the surface mount caps ( as I ordered 47uF instated of 22uF )
All other except 4v Polymer changed to Panasonic FR. Motherboard was a pain to solder to ( lots of copper I assume ), not sure if I should have pre heated a little.
Seems to be running ok ( PSU for a pentium iii is a pain only have 20A 3.3v and 20A 5v Max 110W ATM , as the other 2 I have need work )
Some pictures


Paul