dgrayone Posted September 25, 2006 Report Posted September 25, 2006 Well I broke something!A 2.4 GHz A\V Transmitter (underside photo attached)I inadvertently plugged a power supply that had its polarity reversed compared to what this device was expecting. POOOOF, small stream of smoke and then nothing.I think I cooked a circuit. I have labelled as best I can the picture with the items that go to an extreme temperature when the power is applied. (9V DC 300ma)Is anyone able to assist me in diagnosing what I have cooked? How to repair?All flaming that I am an idiot for doing this is also expected, but this is how you learn not to do these things.Thanks for anything constructive.David Quote
ante Posted September 25, 2006 Report Posted September 25, 2006 Yeah, that was pretty stupid! ;D To pinpoint which parts can be expected to be dead we could use a schematic! If you are very lucky only a few parts are toast. Quote
Guest Tkjas Posted September 26, 2006 Report Posted September 26, 2006 "Yeah, that was pretty stupid! ;D"I once broke my MP3 player by inputting voltage through headphone output. It's now still broken and lying around. If it's just some transistors, resistors, or capacitors, just use a multimeter to test the resistances, capacitances, voltage drops, etc. Then just replace the faulty part. If it's an IC, then replace it or look at a datasheet.hope it's not too expensive ;D Quote
dgrayone Posted September 26, 2006 Author Report Posted September 26, 2006 Unfortunately I dont have a schematic as these where purchased RETAIL fully constructed.They are BADA 1W 2.4GHz A\V Transmitter receiver.I have searched everywhere for even a vague reference to them on the internet but alass I couldn't find them.I purchased them off EBAY.The only markings on them are 223, BAHH (five pin thin in the middle) then 473. next along is the B1206 which heats up significantly.223 measures 8 - 9v473 measures 0.1 - 0.2vNot sure if this helps.I'm throwing a bit more wood on the fire to keep the flames high! ;D Quote
gogo2520 Posted September 26, 2006 Report Posted September 26, 2006 Hello dgrayone You could start checking voltage from the input on down the line, Thats what usualy goes first. have fun gogo Quote
mvs sarma Posted October 1, 2006 Report Posted October 1, 2006 223 and 473 appear to be smd resistors as per the photoreg the ic marked BBHH let me tryas the item is purcheased at Ebay the concerned add may indicate the manufacturer and perhaps a mail req the manufacturer may help for the service data with schematic and artworkor even the ebay may replace the itemsarma Quote
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