Question about Yamaha RX-V675
Turned amp on . ran for a couple of minutes then turned off . restarted and turned itself off straight away . Now wont restart . Can only see red flashing light by mains switch but will not power up .
Switch off from wall. this is a protection safety thing you need to have it repaired if the power from the wall does not fix it.
Posted on Apr 19, 2014
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Posted on Jan 02, 2017
the last click you hear before the amp turns on is the power relays for the amp circuit,these have 2 very small copper contacts inside them which after much time get corroded and cause high resistance when they try to power up the amplifier circuit.awkward to get to and desolder but can be opened up and serviced,done mine and a few friends with yamaha amps which use similar system,had no problem since,also worth checking for dry joints around amp chip i.c legs onto main board.
Posted on May 02, 2008
Just the tuner stops working or the whole receiver?
Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and
operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by
the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient
ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan
(if equipped) is running as designed (some only operate on demand). Clean dust and debris
If the amp comes back on after cooling, you're lucky. They only have so many self-protection
cycles in their lives so continuously resetting or cycling their power without addressing the
cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections
and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not
come up the problem is internal and should be left to an experienced and competent hands-on
Check for loose speaker connections at the speaker as another possible root cause for
Posted on Jul 10, 2011
That your amp does not go into the second stage of powering up indicates a fault which is causing it to sit in non-active mode. This could be due to blown output audio module or transistors or a fault in the safety circuit itself. It is not a fault the non-technician can repair and it would need to be sent to an authorized workshop.
I have seen situations where users unknowingly leave frayed ends of wire shorting across the speaker output terminals which can lead to this sort of fault. You could check this out also.
Posted on Oct 28, 2011
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