i've bought from ebay one Verge VGA285 as is condition. one ofw the channels is working fine , the other not, when i adjusted the input level the non working channel started but it was like a protected mode because was working for 1 sec then off for 1sec and so long , i've opened the aplifier and i've switched between (left to right channel) the final transistors thinking that one of them if burned but they are fine , when i've tried again to see if it's working i've noticed that the final transistors on the side of the channel that is not working are overheating very fast...any ideea , any schematics for the amplifier?
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Re: one channel not working
Could possible a bad bias resister. easy enough checked with a meter for ohm. also check around the circuit one the side that gets hot see if the transisters farther in are getting hot as well of if they seem out of range on a meter. One thing I have found is if you look carefully at an amplifier stage it is pretty bisymetrical. so use measurements from one side to compare to the other. Sometimes this will give clues.
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You`ve mentioned that ON CERTAIN CHANNELS THE TV WORKS FINE, so your trying to say that not all channels THE BLACK SQUARE APPEARS IN THE MIDDLE O THE SCREEN... my be that black square is generated from the broadcast center. may be your unit is good. let me ask you how many channels that your tv works fine..?
It's a common problem with this model. You must change the IR board. This is very easy to do. Remove the back panel of the tv and unscrew/unplug the original board located where the power button, volume/channel, etc is and plug the new one. I bought my IR at Ebay, but sadly have to say that it was not working. Watch out these bargains, :-(
i have bought a crative 4.1 speakers aspire model . out of the 4 only 2 works while the other 2 don't. i already check that the all speakers are in correct working condition. the problem is that my realtek driver is not giving me 4 channel speakers optiion. only 2 channel option is present . what should i do now?
Hello, Thanks for requst me, As far as I understood, you have same settings in both radios, you mentined QT this is the 3° requirment to recive a signal, 1° channel, 2° subchannel (ctcss, pl, etc) and the 3° QT.
if you are using QT you must to send a Call from the other radio, I recomed to set the QT to Off in both radios and tray if you can communicate in both directions.
if does not receive, there is the possibility that one of your radios the Sub channel decoder is not working.
If you could test your radios with a Third radio to know wich radio is not working right.