adhoc 0 Report post Posted July 13, 2003 (edited) bypassing the caps is realtively easy - just 'flood' the space between the legs with a thin layer of solder. and it IS possible to solder to the legs, people do it all the time when they mod graphics cards to pump more voltage into the core. Edited July 14, 2003 by adhoc Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted July 13, 2003 bypassing the caps is realtively easy - just 'flood' the space between the legs with a thin layer of solder. and it IS possible to solder the legs, people do it all the time when they mod graphics cards to pump more voltage into the core. First, what type of cap and what situation is it. If cap connect in parallel, you cannot short it. Short if only it is in siries, normally in the signal trace. Share this post Link to post Share on other sites
adhoc 0 Report post Posted July 13, 2003 (edited) thanks jason, that i was blissfully unaware of. i owe you one. i suddenly realise how lucky i am to have not destroyed any vid cards! Edited July 13, 2003 by adhoc Share this post Link to post Share on other sites
ablaze 0 Report post Posted July 13, 2003 bypassing the caps is realtively easy - just 'flood' the space between the legs with a thin layer of solder. and it IS possible to solder the legs, people do it all the time when they mod graphics cards to pump more voltage into the core. First, what type of cap and what situation is it. If cap connect in parallel, you cannot short it. Short if only it is in siries, normally in the signal trace. I believe those are signal caps. and the guys on the thread have successfully bypassed it. Share this post Link to post Share on other sites
evil-zen 0 Report post Posted July 13, 2003 OT:gryphon, maybe you are playing the CD via the thin analog connector to sound card and cooledit plays the cd digitally via the PCI bus. Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted July 13, 2003 AD8620 is a rare stock in Singapore. Share this post Link to post Share on other sites
ablaze 0 Report post Posted July 13, 2003 hmm..bypassed the caps. now I get about 3.5mV DC on right channel, and negative3.6mV on the left channel. is this safe? Share this post Link to post Share on other sites
ablaze 0 Report post Posted July 14, 2003 practise on some old cards. in my case i practise on the ram leads of video cards. it doesnt get much smaller than that. all the best ablaze! maybe you could invest in one of those 'holders' cum 'flourescent lights' type magnifier things. adhoc, care to share how you soldered the ram legs, without getting solder between the legs? you got some micro-tip for your soldering iron? Share this post Link to post Share on other sites
adhoc 0 Report post Posted July 14, 2003 a. use very very large guage wires >24 is nice. b. tin the wires first. you might want to break off some strands such that you get a a thinner wire to tin. dont use too much solder when tinning! c. using low heat, place the tip (as fine as you can get - the finer, the easier) onto the tinned wire and hold it against the leg. be careful. d. remove heat once wire 'sticks' of course you have to clean the legs with flux beforehand and you solder the wire near the chip, not near the pcb ('higher' up the ram lead) Share this post Link to post Share on other sites
ablaze 0 Report post Posted July 14, 2003 ok, so you're saying that you managed to solder each individual leg of this, onto the pcb, by hand? (big picture ) edit: if thats what you really did, then .. you have got to be the L33T-est soldering guy amongst us man Share this post Link to post Share on other sites
adhoc 0 Report post Posted July 14, 2003 (edited) oh GOSH! what i meant was soldering wires TO the ram, not soldering ram TO the board! and not 1 wire for EVERY lead. more like 3 wires for the entire chip at most! anything more than 5-8 and it gets too crowded to solder properly! sorry for any misunderstanding.. if i could solder like that, i wouldnt need to go to school liao. i would be touring world showing off my skills. speaking of skills, how DO they solder the ram to the board! Edited July 14, 2003 by adhoc Share this post Link to post Share on other sites
ablaze 0 Report post Posted July 14, 2003 cheh. not as L33T as I thought so basically, the opamp's about this size something like 3mm by 4mm or something. with 8 lil legs still trying to figure out how to do this Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted July 14, 2003 first remove the chip. add solder paste along the copper pad, over fill is ok. place ic on top then use solder gun heat up you will see bridging solder, use wick to suck up excess solder tada, finish. i am eating durian, burp. Share this post Link to post Share on other sites
adhoc 0 Report post Posted July 14, 2003 i am eating durian, burp. i REALLY see the link lorh! anyway just a question, if the solder paste is acid type will it have a detrimental effect on the pcb? yes right? Share this post Link to post Share on other sites
