Mix up of Cap. types

[hkfriends]

Dears,

I need to re-cap my motherboard (PCChips) for 8 pieces of 3300uF 6.3V
my problem is : can I mix up of

4 x Rubycon MCZ (10x25 ) 105C Ultra Low ESR
4 x Rubycon ZL (12.5x20 ) 105C HIGH RIPPLE LOW IMPEDANCE (Bigger in Diameter Size)

All are spec. with 3300uF 6.3V 105C

[willawake]

Re: Mix up of Cap. types

it will be ok to mix them, both are low esr and you will have no probs. But if you wanted the best overclock it would be best to use only MCZ as they are one of the best caps you can get.

what about the other caps on the board, do you have only 3300uf?

[hkfriends]

Re: Mix up of Cap. types

the MB suddenly cannot be power up. and found that 8 cap of 3300uF 6.3v are not in flat.

how can I know the cap (new) are correctly solder. Can I test them with voltmeter

My PC still cannot be powered up

[willawake]

Re: Mix up of Cap. types

i didnt understand. have you recap the board already and still no power up?

it is not likely to be a bad solder. if you have contacted the pads with the solder then there is no problem. difficult to make a mistake there.

mistakes are made when you force the caps out or force the new caps in or if you heat the pads for a very long time. or even if you reverse polarity when you put the new caps in.

do you have other caps on the board which are 1000uf and above? maybe you have fail in other caps. you know caps can be flat and still bad inside. replace all caps from bad manufacturers that are 1000uf and above.

maybe you have other problems though. need to check VRMs for damage.
https://www.badcaps.net/forum/showthread.php?t=600

your PSU is tested ok right?

post some pics of the board?

[hkfriends]

Re: Mix up of Cap. types

thanks for your advise. sorry that i'm a little bit hurry in my last post....

OK the situation is:
1. I have recap all 3300nF 6.3V (total in 8 pieces) which are all bad in shape.
2. This is my fist time for the recap soldering job. I double check the solder is firmly to hold the cap. but I worry the solder is not melt down in between the PCB layer and the cap pin.
3. Before the recap job, once I press the power on button. the CPU fan will swing a little and nothing to POST.
4. After the recap job, the CPU fan has no swing behaviour, the board is no POST. (that's why I guess may be the soldering job has problem)
5. I didn't check any >1000uF cap in my board (may be check it later) I will try to take some photos here....
6. BTW, I'm newb to check VRM. Is there any graphic presentation here / or photo.. I know what is VRM in my board. but don't know where is VRM in/out/ground...

thanks again.

[willawake]

Re: Mix up of Cap. types

I worry the solder is not melt down in between the PCB layer and the cap pin.

this is what the purpose of the lead port is. Basically it is a foil which surrounds the hole and joins the solder pad on the front and rear of the board. It makes the connection to the traces in the layers of the board. If the lead port is not damaged then when you solder to the pads on the rear of the board, the connection is good no problem.

[MD Willington]

Re: Mix up of Cap. types

What model is the PCChips mainboard?

[hkfriends]

Re: Mix up of Cap. types

this is what the purpose of the lead port is. Basically it is a foil which surrounds the hole and joins the solder pad on the front and rear of the board. It makes the connection to the traces in the layers of the board. If the lead port is not damaged then when you solder to the pads on the rear of the board, the connection is good no problem.

oh, my god.... may be I destroy the foil surrounds the hole...

[hkfriends]

Re: Mix up of Cap. types

What model is the PCChips mainboard?

I think it is a 925 model with socket 478 DDR + SDRAM mATX

[willawake]

Re: Mix up of Cap. types

hkfriends: are you gonna post some pics?