Q00 0 Report post Posted September 6, 2003 so purtty.... Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 argh. desoldering's such a pain-in-the-ass compared to soldering. I damaged one of the box caps. should I remove it? Share this post Link to post Share on other sites
Q00 0 Report post Posted September 7, 2003 is it working? Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 donno. not there yet Share this post Link to post Share on other sites
Q00 0 Report post Posted September 7, 2003 is there anyway to test if the box cap is working? Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 ok. sorta wired everything up. had to use one opamp rail instead of separate rails for each channel cos I didn't get enough 5486s. argh. so tied R,L V+ V- to ground V+ V- destroyed 2 TLE rail splitters trying to desolder them. ordered some more from TI now. the testing phase. argh. somebody hold my hand. I'm afraid to power the bugger up! Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 hmm..no power..no LED..nothing gets warm. argh. anti-climax Share this post Link to post Share on other sites
ckng 0 Report post Posted September 7, 2003 ok. sorta wired everything up. had to use one opamp rail instead of separate rails for each channel cos I didn't get enough 5486s. argh. so tied R,L V+ V- to ground V+ V- destroyed 2 TLE rail splitters trying to desolder them. ordered some more from TI now. the testing phase. argh. somebody hold my hand. I'm afraid to power the bugger up! Be careful of the TLE2426P, I destroyed mine (and it went up in smoke too) after I accidentally reverse powered my META which I have not implemented the reverse voltage protection yet. Desoldering is such a pain. Regards CK Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 I'm wondering where to start troubleshooting the lack of power now..hmm.. Share this post Link to post Share on other sites
ckng 0 Report post Posted September 7, 2003 I'm wondering where to start troubleshooting the lack of power now..hmm.. The power supply section? Refer to the schematic and trace bit by bit? Check for dry joints, etc as well. Regards CK Share this post Link to post Share on other sites
jtfoo 0 Report post Posted September 7, 2003 argh. desoldering's such a pain-in-the-ass compared to soldering. I damaged one of the box caps. should I remove it? Superficial wound.. Usually still OK.. Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 argh. desoldering's such a pain-in-the-ass compared to soldering. I damaged one of the box caps. should I remove it? Superficial wound.. Usually still OK.. yeah I checked via eric343's method It looks like you melted through to the internal metal plates. Remove the cap, short the leads, and check it with a DMM's continuity tester/ohmmeter function to make sure it isn't shorted. What you should see is that the resistance of the capacitor goes up over a short period of time, and gets reset when you short the leads. If the resistance stays low or reads <1ohm, toss the cap. If the resistance is immeasurably high *immediately* after shorting the leads (doesn't climb at all), then toss the cap. Otherwise, it's fine. still alive! jt! help me troubleshoot my amp! Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted September 7, 2003 Would it be much better to get a diode.... Share this post Link to post Share on other sites
ablaze 0 Report post Posted September 7, 2003 is that a question, or to help me with my PPA? anyway, I've got a 1N4001 put in already. Share this post Link to post Share on other sites
jasonhanjk 0 Report post Posted September 7, 2003 ok. The circuit now has no power or the power supply? Have you check the polarity of the diode... Share this post Link to post Share on other sites
