I just don't understand... One day, I went to turn it on to listen some music and... nothing! Just as if it's unplugged. First I thought it could of been my power source, so I tried to plug it in an other room, but of coarse still no power. And this happened without out any kind of prior symptoms or warning. Have any idea?
P.S. all my system is plugged into a hts-850 monster powerbar, and this complient is the only one that has suddenly stopped to work.
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Re: Has just cessed to work!
Are there any lights on to the front panel of the amp? Do you here a relay click inside the amp after turnon? The click is the speaker protection relay connecting yuor speakers through to the amp. If it you do not hear this click chortly after you first turn it on, then the amp is in protection mode and will need some repair work done.
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Same problem. I hadn't been playing it loud recently. Turned it on one day, heard the relay click, then a light/faint popping/clicking noise out of the speakers, then a short tone sound out of each speaker one at a time, then nothing. Is there a circuit breaker or fuse inside? Thanks, John Crist
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Either there is NO bass on the recordings (if you listen to it with headphones does it have bass?) ...OR...you've wired them out of phase. Connect only one(1) Bose 901's to just one side. Is there bass? Then connect the other side. IS there bass? If not reverse the phase (+ /- connections) and see if the bass comes back. Once that is done and there is BASS, then add the 3rd and then the 4th speaker. .Are you sure your Sansui can handle a lower than 4 ohm load???
Turn off the other channel and listen only to the bad channel playing some music. Turn it up! If you hear any music the pre-amp is working and the power amp is faulty. If you don't, then the pre-amp is faulty. Because it's a stereo amp you have the good channel to compare with the bad. So you can do voltage tests, or "buzz" tests. Buzz Tests or where you apply a insulated tool to the circuits, a buzz will be heard. If it buzzers in the good channel it should in the bad. Ignore the power supply and don't short any parts out!
I have the same exact recover right now as we speak. Try unplugging it for 30 sec then plug it back in. If not either you have a pinched wire or wires are touching somewhere or you turned it up to loud and it went into protect to "protect" the speakers, check connections and go from there
First of all, Marcus, you will need to check if you have blown off the speakers. Just remove and use a good 1.5 AA cell to test both the speakers. If ok connect and switch on. try to hear if the relay is clicking or if you hear any noise. If not disconnect, open the set and use a multimeter to check if the output had failed. Check on the sections only if your are familiar working with circuits or else it might not be recommended. Get help from a friend to check the protect circuitt and the main board for failure of the mosfets/ outputdrives. If you can reset the amp do so by keeping the menu pressed on swithed on. or keep it off for anout 12 hours. it will reset on its own. I hope this helps. Good day
The amp is in protect mode. Something in the final stage is defective. This is usually caused by shorted output transistors. This unit is worth getting repaired. Expect a parts cost in the $25-$50 range.
what was your amp? ic or transistorized? the output transistor of your amp may be opened, mostly it will short but because u still hear sound, maybe open and only the driver transistor are working. replacing output transistor or IC could solve the problem.