Re: What capacitor
Thanks for your help guys!
scooby01
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Last Activity: 04-12-2014, 05:29 AM
Joined: 12-30-2011
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Re: What capacitor
sorry they are 4v 680uf 105c what can be used instead?
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Three bad caps
I have 3 bad caps on a mobo 5v 840uf 105c. I do not have those is stock would 6.3v 1000uf 105c work?if not advice would be nice. -
What capacitor
I have reballed the GPU and have 3 blown capacitors on a hp touchsmart with ratings 5v 820uf. 105C
I have no capacitors in stock with that rating. Before I waste my time would 6.3v 1000uf do the job or can someone recommend a more apt set?
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Re: Acer aspire 5920 short circuit
Thanks for the response. I found the issue, capacitor p033 had gone short circuit. Replaced now fine. hope this may help someone in the future, it is under the wifi card.Leave a comment:
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Acer aspire 5920 short circuit
Hi My acer aspire 5920 has a short. I can not see any visible damage on the pcb. The charger led just flashes when I insert it. Has anyone come across this and what ip may be the cause.
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thermistor on cpu dell laptop
dell cutting out after 20 seconds. new cpu and fan and high quality thermo grease. But still cuts outs out, is there a thermo chip on the mobo where I can change and where is it?
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short circuits on mobo laptop
I am sure this has been posted upteen times, but what is the best way to check for short circuits that are not obvious. Is there a method. I hear a crayon trick? I have 2 motherboards that just kill the psu. Got no idea how to tell what's causing it without going through lots of new psu's. One is a imedia Acer media system which pops the psu and at £49 a go cannot afford it. -
Re: reballing problems
Thanks to all! I am using heat gun. Hot air with much more success, only failed 1of 5. Just takes a lot of patients. Anyone have any manaul profiles for AChI not computerised for refit you and reflow inn leaded. I have fried many a mobo and gpu but have 2 other thermo couplings helping and saving burn outs.Leave a comment:
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Re: reballing problems
Thank you Jeff for the info on different heat from top to bottom. Getting confused with leaded and non leaded. We have a lot of success with reflow. But re balling has always been a pain in the neck until now. Tried heatgun method today with some success. AHCI are similar to the jovy. We haven't got it connected to a laptop at the mo for profiles but its all ok to use using control panel on front. We cannot rely on the thermo coupling so I have 2 other manual ones each side of the chip. What temp and time would U use for the gpu yo be resolderd back? Svoo...Leave a comment:
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Re: reballing problems
I am correct in understand that heat the jig with the stencil in place and heat the jig to allow flux to melt and set? Also leave gpu in jig for heating fully after removing stencil.
What profile settings do use for refit or reflow. We have been using default profile 4 with some success on reflow. Max out at 227c on leaded.Leave a comment:
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Re: reballing problems
Thanks for a very good method. We have heat hot air guns. What temperature and air pressure would you suggest and nozzell?Leave a comment:
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Re: reballing problems
Yes exactly.Leave a comment:
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Re: reballing problems
Hi Jeff that is what I call a jig. I use leaded balls for you. We have a achi station using default profile 4, which reaches 226 c with bottom heat at 180. The profile starts @90 dwell 2mins then 180c dwell 2mins then at about 200 the balls will start to move. Not all but maybe 3 or 4 areas. I use kimbo flux and have tried armtek with the same results. Even tried liquid flux very thin. Same result. There is nothing worse then getting a set of balls stuck. To recap I have expensive flux at different thicknesses.Leave a comment:
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reballing problems
Ok I have been trying to re all gpus and Southbridge chips. I have jigs and stencils. I prefer the jig but as soon as i try to melt the balls i always get a few that join together. I have a jovy and heat guns, but both do the same. The flux i have tried is amtek and kimbo, both with the same results. Also tried different thicknesses and temp. Stencil have more success. Any tips would be appreciated. -
How to check mosfet
hi Can anyone tell me how to check mosfet shorting on laptop mobo.
Thanks sop-8 typeLast edited by scooby01; 01-28-2012, 11:34 AM. -
Re: samsung s3510
There is nothing near the dc socket. It has 1 tiny capasitor then just tracking all the way to the battery/ power area i the other end of the board.
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max8724 ic
can anyone tell me where to buy max8724 ic's in the UK. Some in china from ebay but none in the uk. Tried cpc and rs but none?
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Re: samsung s3510
Hi I have completed the process by removing the oe687 and using 4 x 220d's but I am still get short circuit causing the chargers to blink. I am sure it was caused by a universal charger have you any other things ican try.
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Re: samsung s3510
I Get it now. In other words do not replace with nec tokin oe687, but use the 4 seperate ones in stead. Thanks Will give it ago. Got hundreds of old mobos. laying around,.Leave a comment:
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