Recapping a blown motherboard for Terry

Super Nade · 03-05-13, 07:21 PM

Terry sent over three motherboards that had blown caps and needed fixing. These boards came with good stock caps, i.e Chemicon, Sanyo, Rubycon and Nichion. However, nothing lasts forever and the CPU VRM caps blew out. So far, I've repalced the 4V VRM caps with a bunch of OSCONs I've had (If anybody wants some free Sanyo Caps, send me a pm).

Some pictures of the work thus far. The missing cap between the replacements is a 6.3V 820uF, which I don't have on hand. Waiting for digikey to ship out the necessary caps.

vanibanez · 03-05-13, 07:36 PM

Nice, I've only done dual layered boards so far and some power supplies. Triple layer and higher boards are much harder to repair. I've noticed it's always the capacitors near a heat source (CPU, fets, etc) that seem to pop first.

Super Nade · 03-05-13, 07:59 PM

The trick with multi-layer PCB's is to make liberal use of flux. Check the link in my sig for details.

Caps near high current devices are the ones prone to failure, so as you said, CPU VRM, DIMM, PCIE and 12V power input areas are the ones to watch out for. I'll be replacing pretty much all the caps on the board.

Bobnova · 03-05-13, 08:08 PM

Flux helps all the things! It really does.
Very clean desoldering, looks like you have significant practice with this!
I'm surprised the polymers had issues, that's a pretty solid bank of 'em. I suppose two phase CPU power isn't helping, especially if that's a prescott in there.

Super Nade · 03-05-13, 08:20 PM

The polymers are the ones I put in.

I forgot to take pics of the blown Chemicon's and the Nichion. As for practice, yes I've had loads of practice with soldering/desoldering electronics, part of the game when you are an experimental physicist (electronics plays an integral role in our work).

Terry · 03-07-13, 03:09 AM

Super interesting. Please post more pictures as the work progresses!

vanibanez · 03-07-13, 06:16 PM

Quote:

Originally Posted by Super Nade

The polymers are the ones I put in.

I forgot to take pics of the blown Chemicon's and the Nichion. As for practice, yes I've had loads of practice with soldering/desoldering electronics, part of the game when you are an experimental physicist (electronics plays an integral role in our work).

Nade,

You shall forever be known to me as "Sheldon Cooper.....physicist!".

Super Nade · 03-07-13, 09:15 PM

I wish you had said Sheldon Glashow instead.

vanibanez · 03-07-13, 10:27 PM

Quote:

Originally Posted by Super Nade

I wish you had said Sheldon Glashow instead.

Agreed, but the reference stands

.

03-05-13, 07:21 PM	Thread Starter #1
Super Nade † SU(3) Moderator † Join Date: Aug 2004 Location: Indianapolis	Recapping a blown motherboard for Terry Terry sent over three motherboards that had blown caps and needed fixing. These boards came with good stock caps, i.e Chemicon, Sanyo, Rubycon and Nichion. However, nothing lasts forever and the CPU VRM caps blew out. So far, I've repalced the 4V VRM caps with a bunch of OSCONs I've had (If anybody wants some free Sanyo Caps, send me a pm). Some pictures of the work thus far. The missing cap between the replacements is a 6.3V 820uF, which I don't have on hand. Waiting for digikey to ship out the necessary caps. Attached Images __________________ Motherboard Repair Tutorial \|\| Power Supply Repair Tutorial \|\| A Closer Look at PSU Signals \|\| Understanding SMPS Technology \|\| ASUS P5K Capacitor mod \|\| Kernel Compile Guide \|\| Guide to Wiping an SSD Words of wisdom from krag: "Love & trust are 2 completely different things. Trust is earned, love on the other hand should be given without measure." My hwbot profile
	QUOTE Thanks

03-05-13, 07:36 PM	#2
vanibanez Member Join Date: Oct 2001 Location: newfoundland, canada	Nice, I've only done dual layered boards so far and some power supplies. Triple layer and higher boards are much harder to repair. I've noticed it's always the capacitors near a heat source (CPU, fets, etc) that seem to pop first. __________________ CPU........AMD Phenom II 1090T@3.87GHz (215x18) MB..........Gigabyte 890GPA-UD3H-890GX Ver 2.1 RAM........G. Skill 4x4GB sniper series @1720(215x8) Vid..........Sapphire HD6870 GPU 1Ghz Mem 1250Mhz Case.......AZZA Solano 1000 Blue HD..........1xMushkin Chronos 240Gb SSD & 2xSeagate 1TB SATA3 PS...........Antec TP650w "I would if I could....but I can't, so I won't"
	QUOTE Thanks

03-05-13, 07:59 PM	Thread Starter #3
Super Nade † SU(3) Moderator † Join Date: Aug 2004 Location: Indianapolis	The trick with multi-layer PCB's is to make liberal use of flux. Check the link in my sig for details. Caps near high current devices are the ones prone to failure, so as you said, CPU VRM, DIMM, PCIE and 12V power input areas are the ones to watch out for. I'll be replacing pretty much all the caps on the board. __________________ Motherboard Repair Tutorial \|\| Power Supply Repair Tutorial \|\| A Closer Look at PSU Signals \|\| Understanding SMPS Technology \|\| ASUS P5K Capacitor mod \|\| Kernel Compile Guide \|\| Guide to Wiping an SSD Words of wisdom from krag: "Love & trust are 2 completely different things. Trust is earned, love on the other hand should be given without measure." My hwbot profile
	QUOTE Thanks

03-05-13, 08:08 PM	#4
Bobnova Air Superiority Senior Member Benching Team Leader Join Date: May 2009 Location: Humboldt	Flux helps all the things! It really does. Very clean desoldering, looks like you have significant practice with this! I'm surprised the polymers had issues, that's a pretty solid bank of 'em. I suppose two phase CPU power isn't helping, especially if that's a prescott in there. __________________ "Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe." -- Einstein (maybe) How to check your PSU with a multimeter. 17bXw5t51rEBXGavJFMJsC8g7HQgThUGc7 Heatware.
	QUOTE Thanks

03-05-13, 08:20 PM	Thread Starter #5
Super Nade † SU(3) Moderator † Join Date: Aug 2004 Location: Indianapolis	The polymers are the ones I put in. I forgot to take pics of the blown Chemicon's and the Nichion. As for practice, yes I've had loads of practice with soldering/desoldering electronics, part of the game when you are an experimental physicist (electronics plays an integral role in our work). __________________ Motherboard Repair Tutorial \|\| Power Supply Repair Tutorial \|\| A Closer Look at PSU Signals \|\| Understanding SMPS Technology \|\| ASUS P5K Capacitor mod \|\| Kernel Compile Guide \|\| Guide to Wiping an SSD Words of wisdom from krag: "Love & trust are 2 completely different things. Trust is earned, love on the other hand should be given without measure." My hwbot profile
	QUOTE Thanks

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03-07-13, 03:09 AM	#6
Terry Member Join Date: Dec 2000	Super interesting. Please post more pictures as the work progresses! __________________ My Heatware
	QUOTE Thanks

03-07-13, 09:15 PM	Thread Starter #8
Super Nade † SU(3) Moderator † Join Date: Aug 2004 Location: Indianapolis	I wish you had said Sheldon Glashow instead. __________________ Motherboard Repair Tutorial \|\| Power Supply Repair Tutorial \|\| A Closer Look at PSU Signals \|\| Understanding SMPS Technology \|\| ASUS P5K Capacitor mod \|\| Kernel Compile Guide \|\| Guide to Wiping an SSD Words of wisdom from krag: "Love & trust are 2 completely different things. Trust is earned, love on the other hand should be given without measure." My hwbot profile
	QUOTE Thanks

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