SOURCE: I have blown the protection circuit on my yamaha
Hi friend,when something goes wrong in the output of the amplifier the protection circuit take place to prevent further damage could cause by DC power such as speakers or other related circuits...I think in your situation either one or both output amp stage have blown,then the protection cct turned on (not blown protection circuit!?). If so you have to check all the output transistors for short cct, if shorted you must also check all the DC bias cct nearby such as small transistors,resistors...If you are not familar with amplifier it better to find a tech as all amplifiers need a very precide repair technic , If the DC BIAS were wrong , when you turn on the power it will blow straight away! All times and cost will be waisted!
GOOD LUCK!
Tan Ta
SOURCE: How do you reset the
Hi,
Can you be a little more specific about what the fault is and what you are trying to do? Is the machine constantly powering off?
The reset functions are in the ADVANCED SETUP menu which can be accessed by holding down the STRAIGHT button while you turn the power on.
If you can give more specific details about the problem, it will be easier to determine what might need to be reset - rather than resetting the whole unit.
Regards,
BElectric
SOURCE: how do you reset a
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 from it.
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 tech.
Check for loose speaker connections at the speaker as a root cause for ntermittent shutdown.
SOURCE: Power went out at house....
yes it could be... but try to unplug the unit for 30 min. after 30 min try to plug again and turn on. check if the problem is solve. if not and if its under warranty just bring it back to the store or in the authorized service center. because there is no serviceable parts inside the unit... ty
956 views
Usually answered in minutes!
×