Question about Harman Kardon AVR 500 Receiver

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AVR65-"PROTECT" warning blinks upon Power On

AVR65 - "PROTECT" warning bliinks upon Power On

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  • dworkman10 Jan 27, 2009

    protect comes on. how do i fix

  • peluka Jan 31, 2009

    AVR146,start ,ligths uo ,"protect" message shows up and power down

  • DeBoss_dk Mar 19, 2009

    On Powerup the recievers blinks *Protect* - and 1-2 secs later it shuts off

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Open up the unit and change the buss fuses inside 2 small ones on the right side of receiver.

Posted on Jun 13, 2009

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1 Answer

Yamaha rx-v679 only standby red power bottom when you turn on its only blinking what is the problem ?


It is most likely locked in protect mode. Try resetting by holding the TONE CONTROL and INFO buttons and pressing power. Watch the front panel display when you do this, and it will tell you what protect was tripped.

Jan 11, 2016 | Yamaha Audio Players & Recorders

1 Answer

Why Protect Sub Woofer warning and then power off by itself


Hello. My name is Dave. If the PROTECT lamp is on, you have a damaged amplifier, which will required a qualified audio tech.

Dave

Sep 30, 2012 | Audio Players & Recorders

1 Answer

Sr576 standby light blinking


Most likely, you have DC Offset(a bad amplifier). The unit is shutting down to protect your speaker system, as well as protect the unit from any further damage. If you require more assistance, or would like to inquire about repairing your Onkyo, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.

Jul 22, 2012 | Onkyo TX-SR576 7 Channels Receiver

1 Answer

I called a Denon service center,and the can repair it for $250.00 to $300.00 or less. The problem is Display not lit, and power indicator is flashing rapidly. I tried to initialization of the...


hi,
Blinking of power indicator means the amplifier is in protection mode.First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the protect show or not . if not, then any of the speaker is damaged. If then also it shows protect you have to check the amplifiers hardware.

AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong.
Normally AV receivers show this when any of the output amplifier have some problem. There are seven amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer through display that PROTECT.
You have to check the amplifier.
For that you need digital multimeter,soledring iron screwdrivers etc
Open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one.
after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistors replaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself.
After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
ok

May 19, 2011 | Denon AVR-885 Receiver

1 Answer

When i put on my 3600 protect come on right away


Hi there,

I'd suggest switching the power off then disconnecting all of your speakers, then switch the power on again. If the PROTECT warning still comes on, you have a fault within the amp. If not, re-connect your speakers one at a time and power down between connecting each one. If you get the PROTECT message after connecting a particular speaker, you have found the cause of the fault and you should inspect the speaker cable and connections for that speaker and replace if damaged.

If you reconnnect all of the speakers and the message does not appear, one of your speakers probably wasn't connected correctly.

Hope this helps. Please try this and post back if you need further assistance.

Regards,
BElectric

Mar 03, 2011 | Harman Kardon AVR 3600

1 Answer

Protect comes after pressing power button


check the connections on the back , specially the speaker wires , make sure the strands are not crossing each other causing the PROTECT SIGN , hope it helps , AJ

Sep 23, 2009 | Sony STR-DE197 Receiver

1 Answer

My onkyo tx ds747 is saying protect even if i dont have anything plugged in to it! can you plz help me


Hello

maybe you have defective power transistor output and this is shorted, or the problem is in the power section like shorted diode shorted capacitors or open circuit may cause this, and the STK IC if shorted you got protect warning..

Angel
Thansk...

Aug 02, 2009 | Onkyo TX-DS747

1 Answer

Power button (light) blinks


Check your speaker cables, make sure none have shorted out. if they have, then thats why the unit won't power up. The units protector circuit is being activated upon startup.

Dec 08, 2008 | Denon AVR-1706 Receiver

4 Answers

Pioneer VSX-816


With the receiver off, press ENTER + ADVANCED SURROUND keys continuously for 2 sec. and it will tell you the fault it encountered. Even if it has a short, it will still protect the speakers; however, it is still a good idea to disconnect all speakers before doing this.

Dec 20, 2007 | Pioneer VSX-816-K/S Receiver

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