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Denon AVR-1603 shut itself off and will not stay on. The On/Standby light is flashing. The ventalation is good and the unit is not too hot. I have tried to reset the unit by holding the Power button and the A & B speaker buttons but it did not help. Any ideas???
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power off the unit using the front panel Pwr switch
press and hold SPEAKER A and B buttons;
keep pressing on the speaker buttons, switch on the AVR
when the display is blinking release buttons Check the attached links,instruction and guides, Good luck
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if the receiver does not power on from standby there is a problem like bad power supply or even bad macroprocessor. You need to bring it to a service center for diagnosing. 10-years old receiver, maybe better to buy new one.
Any device has only so many self-protection cycles in it before it gives up the ghost.
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 intermittent shutdown.
This is a short or unstable ohm load. Remove all speaker wire connections to see if the amp will stay on.
If the problem goes away when disconnecting the speaker wires try this:
1) Check volume level on zone one and zone 2 if connected. If it is too high the amp will go into protect mode and shut off exactly as you described.
2) Make sure no wires are touching any other wire or the metal surface of the amp. This will cause a short and send the amp into protect mode.
Try to reset the macroprocessor. Unplug the unit from AC, hold both buttons SPEAKER A and SPEAKER B and plug the cord in outlet. After display flashes several times release the buttons. No result? - repair shop.
You will need an adapter amp which converts the tiny tiny signal from a
magnetic phono cartridge up to the line level that you need to feed
into your AUX input jacks. They cost about $20 to $30 dollars and
can be found at Radio Shack. Unless of course you have a phono
input jack on the back of your Denon unit. Good luck.
It has a blown channel, unless you are good at repairing them I suggest an authorized Denon service center. This Denon not only needs the shorted output transistors replaced, but a few resistors, a couple of driver transistors and a capacitor on the preamp board as well. alot of parts to be replaced. I have repaired about a hundred of these over the last few years and my shop charges about $200 for this repair, other shops should be about the same.
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