logan_dslasher Posted March 16, 2006 Report Share Posted March 16, 2006 when i got home last night, my mother was waiting at the porch. she said that the computer blew up!! i found out that it's only the speaker that got damagd. she said it made a popping sound as soon as she plugged he AVR. she said the saw something sparked..it's still under warranty (i think) so i didn't try to open it and see what's wrong.. i have a BT-693 speaker system. does it have a fuse? maybe that was the only part damaged. how could i check what's wrong with it? let's say i perform a "surgery" on it, where should i start looking for the damage? if it has a minor damage, i want to fix it myself.. i wanted to learn, please help me... thanks.. :) Quote Link to comment Share on other sites More sharing options...
ante Posted March 16, 2006 Report Share Posted March 16, 2006 Hi Logan,If it’s still under warranty it might be better not to open it incase there is big trouble inside! :oBut if it’s not, be sure to pull the plug before you try to open it! If you open it look for obvious fried or miss colored parts and try to identify whatever looks suspicious! You can always take a picture or two and post them here for further guidance! ;) Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 Hi Ante!i took it to the shop where i bought it for them to have a look at it.. i found out that its not under warranty because it is only a free accessory (pretty good technique - when buying a computer package, all you have to pay is the CPU and monitor, the rest is FREE; though the price is increased for the CPU and monitor >:( ) anyway, having them to tell you what is wrong with it even if not actually fixing it will already cost me something.. so i decided, to try (first) to fix it myself..i already opened it.. it looks pretty clean.. no burnt parts or whatsoever can be seen.. what could be damaged? is it the speaker? am sorry i can't provide a picture of it. i don't have a digicam or a webcam for a screencapture.. it doesnt have any obvious damage..thanks... 8) Quote Link to comment Share on other sites More sharing options...
ante Posted March 19, 2006 Report Share Posted March 19, 2006 Hi logan,Really smart move giving it away to avoid any warranty! >:(Well, I guess you did not find any fuse inside or outside? BTW does it run of a wall wart or is there an onboard mains circuit? This is a bit fumbling in the dark but we have to start some ware don’t we? ;) Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hi LoganHow is it powered? If it is a wallwart(or what the name for it is), then itcan be that one that is at fault. Also try to turn up the volume to max,and take a screwdriver and touch the inputs, if there is some sound, itshall be some highpitched, 50 or 60 Hz hum, your speakers is probablynot at fault. The input is the wire you connect to the computer(soundcard).Then it's probably your soundcard that is at fault. And that, i belive is atwarranty. ;D ;D ;D//Staigen Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 it uses 220V. i have tried to set its volume to the max but haven't tried touching its inputs.. i'll do that later. i don't think i have a sound card, there's this oscilloscope and freq analyzer i found on the eLab.. and when i transferred the program to my pc an error message flashed.. it said something about the program requiring a sound card.. so i guess i have none..if i try measuring the speaker with a multitester (R x 1) what should the reading be? can i do that? Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hi LoganHow is your speaker system connected to your computer?Via USB ?//Staigen Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 aw! i missed Ante's second post.. nope! there's no fuse. that's the first thing i looked for.. BTW whats a wall wart? it has a small PCB inside it, something like 2X2 inches or so.. its where the volume switch and control is placed. the speaker system has two speakers, just like in the picture i posted. the one with the volume switch and volume control is connected to 220. it's connected to the CPU not via the USB but into a round port.. Quote Link to comment Share on other sites More sharing options...
ante Posted March 19, 2006 Report Share Posted March 19, 2006 Hi Guys,logan: You said your mom saw something sparked; can she point out the spot where it came from? Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 she san barely remember where but she said it's somewhere on the speaker.. she said she probably saw it on the speaker with the volume control.. Quote Link to comment Share on other sites More sharing options...
ante Posted March 19, 2006 Report Share Posted March 19, 2006 OK, and I suppose this is the same as the one with the mains supply in it? Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 YES. the one connected to 220 and also to the CPU. the other speaker is not connected to the CPU neither to the mains. a small wire connects the two speakers.. Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Ok, do the test i told you, than we know if it is the speaker or the soundcard!//Staigen Quote Link to comment Share on other sites More sharing options...
ante Posted March 19, 2006 Report Share Posted March 19, 2006 Does it have any openings in the back or side like gratings to let the air in for cooling? This is where a spark could find its way out from some rectifier of capacitor when it “exploded”!Have a close look at the parts near here and remember; do NOT have it plugged in while messing around inside! Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 none. it's almost airtight. the only "ventilation" it gets is from the speakers' cover. i have an experience once where the capacitor "exploded" i saw a black rubber-like thing coming out from the bottom of its cylindrical casing. i think i saw none, but i have another closer inspection. Yeah, i'm more careful now. last week, i had a "chunk" of my flesh scraped out of my left index finger, then 3 days later my right hand got burned by a soldering iron.. thanks for the warning.. 8)is it possible for a CPU not to have any sound card at all? Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hey Ante, dont you think he should do this simple test first, before dismantlinganything? Probably it is the speakers amp or psu that is at fault, but you neverknow until you test.//Staigen Quote Link to comment Share on other sites More sharing options...
ante Posted March 19, 2006 Report Share Posted March 19, 2006 Hi Stagien,Maybe you are right; it’s just me being reluctant to power up things that has “exploded” without first try to diagnose it! ;D Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hi Loganis it possible for a CPU not to have any sound card at all?Of course the computer have a soundcard, else you won't hear anything!The CPU dont have a soundcard!//Staigen Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hi AnteIf the speaker was powered when it happend, and maybee a few hours after that, i belive theres not gonna be more damage to it than there already is!//Staigen Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 maybe i have a slower (primitive) sound card that's why the frequency analyzer "complained" that it did not detect any sound card.The CPU dont have a soundcard!//Staigenwhere is the sound card then located? Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hi Loganwhere is the sound card then located?Probably on the motherboard, else it is in a slot! Dont you see that, bylooking at the rear side of your computer?The CPU is an IC !//Staigen Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hey LoganWhen doing this test, with the screwdriver, also hold your finger at themetal part of the screwdriver, and dont hold in anything else, than yourbody act as an antenna, and you hear a highpitched hum from thespeakers, if they are allright.//Staigen Quote Link to comment Share on other sites More sharing options...
ante Posted March 19, 2006 Report Share Posted March 19, 2006 Hi AnteIf the speaker was powered when it happend, and maybee a few hours after that, i belive theres not gonna be more damage to it than there already is!//StaigenIf it’s a glitch in a solder joint or connector it might spark again when you move it causing the spark to hit your face! ;D ;D Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 19, 2006 Author Report Share Posted March 19, 2006 The CPU is an IC !uhhhmmm.. yeah. you're right. it's just that almost lectures about computers that i have heard about "parts of the computer" labels the rectangular box with all the drives, slots, boards, cards, etc as the CPU.. Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 19, 2006 Report Share Posted March 19, 2006 Hi Loganthe rectangular box with all the drives, slots, boards, cards, etcThat is the computer! If the lecturers tell you that it is the CPU, you can tellthem that they are wrong! Then you also have the periferal furniture too, themonitor, the keyboard, the speakers, the mouse, the modem, the webcam andso on.//Staigen Quote Link to comment Share on other sites More sharing options...
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