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Home / I-Opener Areas / I-Opener Technical Stuff Yamaha line-out modification oops

Yamaha line-out modification (modified 0 times) jackass Profile | Email yamaha line-out modifcation http://pictures.deadtrout.com/projects/who_knows.jpg I tried last night to add the TL082 modification to my iopener to get line out audio from the Yamaha sound chip but I failed miserably. I was using a cheap soldering iron and didn't have a steady hand. In the process of trying to attach wires to the end of resistors I broke off the two surface mount resistors (and their pads) I was trying to attach the wires to. After this I investigated the board a little further and found two pads on the underside of the board that I should have used instead. When I attached my amplifier circuit to them they didn't provide any audible output and without an ocilliscope I don't have many other tests I can perform. I'm guessing that the resistors that I broke off were pull up or pull down reistors and if I could replace them then I could regain audio. Does anyone know the values of these resistors? I've taken ButtonPunchers picture and circled the two resistors that I broke. If I could find their values I could replace them with non-surface mount resistors in my amplifier circuit and just attach to the proper places. Also, since I broke the pads off I can't trace the connections well. If anyone knows where these resistors connect to it would save me many many headaches. Ultimately there would be a pad on the bottom somewhere that attaches to both sides of the resistor. The picture is at http://pictures.deadtrout.com/projects/who_knows.jpg. I've circed one resistor in red and one in green. If you could help me out in any way I'd very much appreciate it. Much TIA Terry iopener@deadtrout.com 12-31-2000 12:46:57

RE:Yamaha line-out modification (modified 0 times) mp3boombox Profile | Email Welp the resisters them self's are not important if you just want audio out, due to the fact that the tl082 is just taping the line pryer to the mixing chip. But if you broke them off :( i dont know what there value is and as for my multimeter one is 4M ohms? and the other is like 7M ohms i believe or something like that :) i'm new to the multimeter area. But as for the audio hack, If your intrested in a prebuilt audio hack which just requires you to solder 4 wires including 3 of the spots on that picture you linked to. I'v also got comprehensive documents with pictures and GOOD explination on how and what to solder, plug exelent tip's on soldering. I dont know what you consider a cheep soldering iron but when it comes to SMT work, the lower the wattage the better. Though i use a 35watt soldering iron for just about every thing i do. THEN again I'm a pro at soldering and have been doing it for a long time. I do have a post on the bbs about the serial and audio mods I make, but if your intrested in just my install notes. I've created an office 97 word doc with pictures. descriptive instruction's with examples tip's and idears plus good to know FYI. This may be your key to fixing your IO. BUT? you broke or chiped the smt resisters??? if you did how the H*ll did you do that? heh must have been a REALY cheep soldering iron ;). berinc@acadia.net Oh did i mention my serial mod is solder less :) may require hotglue or a dremal though. 12-31-2000 15:05:38

RE:Yamaha line-out modification (modified 0 times) mp3boombox Profile | Email sarry for my spelling but a new years eav party waits for no one!!!! chow, come monday I'm going to see about finishing my much awaited web page. my theam for tonight is RUM!! AND COFFIE BRANDY!! and A HUGE party about 2 hours from my house. its T MINUS 5:30pm EST and counting. 12-31-2000 15:22:03

RE:Yamaha line-out modification (modified 0 times) Tackhead Profile jackass: Are you sure those parts are resistors and not capacitors? Most of the resistors on the IO's board are black, and have the resistance marked on them in small white letters. mp3boombox: I can't speak for jackass, but when I screwed up, it was because I was being lazy. I'd "tacked" the wires onto the points using very little solder for test purposes, and one wire had already broken free after testing, so I figured the others would also break free with a tiny wiggle. St00pid me. Fortunately, I was able to reconstruct the damaged trace pretty easily, and I replaced the parts with some SMT caps salvaged off a scrap board. 01-02-2001 12:52:44

RE:Yamaha line-out modification (modified 0 times) mp3boombox Profile | Email Well my first rull of thum. When it comes to SMT soldering, DO NOT ADD SOLDER TO THE POINT your going to solder. Instead add solder to the WIRE OR the part your going to put ON the possion. meaning if your adding to a CAP or RESISTER thats an SMT and already inplace but your adding any thing. be it wire, cap, ANY OR any thing else. always add the solder to the part first and only. Then again if your adding an other VERY small SMT part this is kind of backwords. you'd want to Clean your iron tip, then quickly tap the end with a TINY little bit of solder. NOW add the part and tuch your hot tip with solder to the point needed. This is one of the safest way's I've found for soldering smt's. the SMT parts can get prity hot, and resisters i'd say take more heat then cap's will. But you never know its not the amount of heat so much as it is the extended amount of time you appled it for. 01-02-2001 14:30:00

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