I would really appreciate some help figuring out how to replace just the capacitor on my motherboard. I removed the back to replace the charge port and the smd capacitor had broke off loose in the casing. I have identified it as the light blue one in the photo attached. The identifying numbers are faded so all I can make out is “F 729” and what MAY say 330. I can’t make out the voltage at all. I am trying to replace just the smd instead of the whole motherboard as the computer was still working fine before I took it apart and it looks like an easy fix if I can find the replacement. The “F729” is not bringing me any luck in finding a replacement.
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silver can with blue print?
polymer - is the old one damaged?
one thing you can do is power the board up and meter the voltage on the pads.
them multiply it by 1.5
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Thread moved to laptop forum.
The boardview and schematic for this board are available - https://www.badcaps.net/forum/troubl...nw-dag71mb16d0Comment
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Near the GPU?
C1083 *330u/2.5V_3528H1.9
pc481
*330u/2V_D
Last edited by mon2; 02-18-2024, 05:20 AM.Comment
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Hi, sorry everyone for the inboxed message. The forum doesn't seem to work great on my phone.
stj - It is the silver can with the blue print. The writing on it is wore off but it doesn't look damaged. The black piece it sits in broke off with it and I immediately lost it. I don't know how to power up the board as I removed the charge port. I assume there are nodes I can touch with a multimeter but I wouldn't know where.
mon2 - I believe it is near the GPU. It is the light blue one in the photo I sent. I had already been looking at the schematic but I was unable to figure out which one it would be. I see you have two different voltages shown, can you explain why?
I would also appreciate help sourcing one without a long lead time too. The one below has a 15 week lead time.
https://www.digikey.com/en/products/...E330MY/4204340
Thank you for your patience as this is new to me but I am enjoying the learning experience.
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In the linked schematics, there are 2 of the 330uf caps. One is near the gpu. The one you have linked is a good candidate. The lead time only applies if the part is out of stock. They are showing over 18,000 in inventory at this time. Be sure to solder in the same orientation since the capacitor has an orientation (+ and - side).Comment
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When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
Rubycon YK DataSheet (b... -
I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
a few days ago I finally purchased mser-100 v2 and I tested its abillity of measuring ESR value.
I found that It shows pretty accurate ESR value for electrolytic capacitor,But When I measure polymer capacitor of dreamcast game console,I found that one third of polymer capacitor's ESR value is more than twice the value of ESR meter table.(for example, I measured one polymer capacitor of 6.3v 100uf, It showed ESR value of 7.68)
Although my dreamcast now turns 20 years old but it still works. I occasionally have played game with it.
Is this ESR value of polymer capacitor correct?... -
"If I wanted to replace an old 15uF/400V capacitor with a new one,
I have a new 15uF/400V and a new 22uF/400V capacitor. When measured, the new 15uF reads only 13uF, and the 22uF reads only 20uF. Can I use the 22uF capacitor?" -
Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never...
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