Question about Audio Players & Recorders
When switched on there is a click sound while switching from pre amp to power amp. sometimes it switches on but then trips and shuts down.
Try unplugging each set of leads 1 set at a time,and after each set of leads are unplugged switch it on as it may be a set of faulty leads,it sounds like the safety cut out is coming on and switching off the power to save your system blowing due to bad or broken phono leads or speaker cables.it could also be that you could have blown your output transisters or something else thats causing the saftey cut out to cut off the power,also make sure there are no loose connections inside your mains plug as this would cause the same thing.
Posted on Jan 08, 2013
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Posted on Jan 02, 2017
SOURCE: gem sound exa 3950 amp
If it's a straight-up power switch then it will need to be replaced if it works off a relay then the relay is gone.
Posted on Mar 24, 2009
Probably selector switch when you turn to CD mode. The ball bearings inside the switch make poor connection resulting in intermitant problems to either speaker. Yamaha knows the selector switch is defective but has stayed silent. I've had mine replaced for $144.00 Can and it works AOK now. Different switch of course. I've had my problems with that switch for a long time and it was after a few years that a knowledgeable technician knew of the problem. Poor support by Yamaha! I'll never buy a Yamaha product again nor will my relatives and friends. Do the calculations and assess whether the cost of the switch is worth the value of the receiver. I think it is worth it as the receiver when it works is excellent. It is at a stage now when other problems could creep in though including corrosion on the boards and solder joints so have the technicians do a entire quality check at the same time...
Posted on Jul 02, 2009
In bridge mode, the left and right amplifiers are in essence connected together. Typically, the speaker connections are to the positive connectors for each channel for this mode. WIth the speakers still connected, you essentially shorted the outputs to ground and smoked the output section. The unit will detect this now and not turn on the output section. Your unit is in what is usually called "protect" mode. This unit will require repair. Expect to have the output transistors replaced at the very least. I would estimate around $16-$40 for parts.
Posted on Jul 03, 2009
Amplifiers have protection circuits that sense current overloads, and especially internal faults, and theyt shut themselves down to prevent further damage to the unit, until it can be troubleshot and fixed. They're designed to allow minimum damage to the unit, and the cause of the overload must be found and fixed by troubleshooting the unit systematically. Sometimes you can get lucky and ohm out a suspected power transistor or IC regulator and replace it successfully, but most of the time a scope is required.
Take it to an audio repair shop and get an estimate first, but know that they do charge by the hour, and it can get a bit expensive.
I noticed this same problem was posted in a couple of forums on the net, but they never got a solution or followed up, so service is in order.
Good luck, and hope this helps.
Posted on Oct 30, 2010
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