Re: CTX S762G - Some Questions...
Thanks. 
Originally posted by pantherts
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Re: CTX S762G - Some Questions...
i happened to be 'perusing' some old threads and looked at this one.
i could be totally wrong here & it could just be the photo playing tricks but R92 in the 'Logic Board 3' picture looks blown.Comment
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Re: CTX S762G - Some Questions...
I see what you mean. It does look funny but that section of the board is for the audio input to the speakers. I suppose this could be responsible for the main logic chip overheating but I'm not sure. It seems like if that was blown the audio would just plain not work and that's about it. Ideas?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 have here a HP pavilion hp 15-cs2975nd with a 1.095v power supply that is driven by a FDMF3035. I do see about 80mV of ripple on my scope. I searched through the datasheet to find possible values of the ripple but I don't understand the datasheet well enough.
So I have two questions:
1) what is the typical ripple voltages of gpu/cpu on a laptop or pc mobo?
2) what would be the max ripple of a FDMF3035 that drives an output of 1.095V?
Would be nice to have a rule of thumb of say a percentage of the supply voltage to be an acceptable ripple voltage....12-09-2022, 06:51 AM -
Hi all
I need to replace a 680uF 35V SamYoung NXB cap which has got a ripple of 1820. Whilst passing my local little electronics shop I picked up what they had in stock which was a 680uF 35V Panasonic FC with a ripple of 1655.
As the ripple rating is only 9% below what the original was I am wondering whether to risk it and fit it.
The catalogues specify a capacitance tolerance of +/-20% but state nothing about the ripple. If there is a similar tolerance for ripple then I might be worrying about nothing. Does anybody know?
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Hi
I have a Lenovo 530 14ikb i5 8th gen motherboard and it fails to start Windows: it normally dies after I try to load Windows. Getting into bios screen works fine.
Made some measurements and I suspect that there is to much ripple on the 2 Vcore coils.
What is normally the maximum ripple allowed on say any of the power supplies? A few %??
The ripple is on both Vcore as outlined in red in attached photos.
Could be a bad driver?
Cheers... -
Hi fellow troubleshooters. This is my first post on badcaps. I've recently setup an electronics workbench. i'm also building a studio with old equipment bought faulty at low cost.
I've been into electronics since the mid 80's and particularly in the last few years though only getting hands on with repairs now. My knowledge gaps are significant so I'll be posting here to seek guidance advice and general practical applied learning.
On my bench today is an old ca. 1993-95 Akai hardware sampler. This runs on both a linear and Smps supply. Both are getting on in age and ripple...
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