Question about Kenwood Audio & Video Receivers

1 Answer

When I switch on my Kenwood A-722L all the lights start flashing and 'PROTECT' appears on the display. Any ideas?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 624 Answers

You have an amp failure, this can be a problem with a speaker but is more often a shorted output channel.

You can check to see if it is a speaker by disconnecting the speakers and then turn it on. If it goes into protect again, you have a shorted output channel. If it turns on, you may have a bad speaker.

If it turns on, try connecting one speaker at a time until it goes back into protect. When it goes into protect, you just found your bad speaker (last one connected).

Make sure you turn it off before connecting a speaker. Then turn it back on again. Do this for every speaker you have.

If it stays in protect, you should take it in for service. Unless you have the proper tools and experience working on electronics there is nothing you can do to repair this yourself. I have seen many people try who were not qualified to work on electronics, and more often than not, they cause more damage than they started with which results in a more costly repair.

Let me know if you need any more help.

Dave

Posted on Jul 02, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My kenwood kr-v7030 won't turn off anymore with remote or manually.


Either the remote battery are flat or the frequency settings have changed. You can check with the manual the type of frequency it uses to match the that of the Kenwood. Sometimes there are switches you can change to adjust the correct frequency. Others have a learning code set by the manufacturer and are usually in the operation manual. If you want to test whether the remote is transmitting the signal to the Kenwood or not, Please do this...

If you have a digital camera or smartphone camera, switch the camera on and look at the viewfinder or camera screen; for smartphone, in a moment, then point the remote to the camera lens and press the volume button, which keeps sending the signal to the to control the volume of Kenwood system. If you see the infrared light on the remote flashing, then the remote is fine.

Now, about the smartphone camera. Start the camera and switch it for video capture (filming) and then point the remote towards the camera lens, and likewise you should see the remote light when doing the same tests as you with the video camera. If the infrared light lights up when pressing on the volume, the remote is fine.
It could be Kenwood, which requires factory repairs, not by you.

Dec 22, 2014 | Kenwood Audio & Video Receivers

1 Answer

Protect Mode is displayed


It usually means something is drawing too much current---a short inside the unit----idea is to prevent a chain reaction that frys half the unit.

Consider having a shop look at it and do check to make sure all the connections are correct.

Dec 04, 2012 | Kenwood VR-6050 Receiver

1 Answer

My kenwood krf-v5300d overloaded? Stand by light flashes if pressed stops flashing if pressed again unit turns on but doesent pass start up and shuts off again havent managed to find a solution from bassic...


This unit is in what is called "protect" mode/ See the link below for an explanation of this. Specifically to your unit, the output components are unique to Kenwood and are not cheap. Further investigation to locate the reason for the protect mode will be necessary prior to any attempt to estimate the cost of repair. Something as simple as a missign voltage can cause this symptom.

Please feel free to update this with any other questions or concerns that you may have.

Dan

Link: http://www1.fixya.com/support/r5390728-protector_means

Oct 21, 2011 | Kenwood Audio & Video Receivers

1 Answer

My stereo sysytem is a mini stereo: serial number 10200055. It currently says "protect", what is this and how do we return our system to normal operations?


Hi there,

When the word PROTECT appears on this display, this means the unit has detected a critical fault which could potentially cause harm to your stereo system.

The most common cause is a short circuit somewhere - something even as simple as loose speaker wiring could cause a short, triggering the Protect message.

You will need to determine if there is a possible short somewhere, so I recommend you start by firstly turning power OFF, disconnecting all speaker wires, then turn unit back ON.

Operate the stereo (without speakers) and turn volume up:
  • If Protect message appears when turning volume up, then stereo unit itself has an internal fault
  • If no Protect message appears, then suspect the speakers may be causing the issue.
  • Reduce volume and turn unit OFF
Re-connect speakers (ensure the connections are secure), turn unit ON:
  • If turning volume up triggers the Protect message again, there is an issue with the speakers or connections

Hope this helps.....

Sep 04, 2011 | Kenwood Audio & Video Receivers

1 Answer

Kenwood RV300 is flashing "PROTECT"


the amp has gone into protection mode .but you knew that. the reason would be a crossed speaker wire. like fuses the polar switch opens when the cables touch /cross and is made to reopen when the cross it rectifyed disconnect all speakers stand the unit alone see if it powers up then. if not let me know

best of luck

Dec 08, 2010 | Audio & Video Receivers

1 Answer

After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

Nov 16, 2009 | Denon AVR-485 Receiver

1 Answer

Display says Protect and doesnt work


the protection circut has kicked in and is stopping any further dammage
it will need to be looked at to determine the problem

Nov 01, 2008 | Kenwood VR-407 Receiver

1 Answer

Kdc-mp6036 kenwood cd player jus cant find the code


Today i brought a 98 ford and the dealer replaced the cassette player with a Kenwood KDC-MP6036 from a trade in they had. It was fine for 30 min approx then music stopped and "PROTECT" was displayed and now nothing works ???? what can i do

Aug 07, 2008 | Kenwood Audio & Video Receivers

3 Answers

Kenwood Midi M-97/M Switch power on and after a few seconds i get a protect message appear on A-97 amplifier and it blocks use of the system. -Paul


this is prob because of a wrong connection between speakers connections + to + - to - check all speaker wires are correct with no shorting out between + & -

Steve

May 15, 2008 | Audio & Video Receivers

Not finding what you are looking for?
Audio & Video Receivers Logo

Related Topics:

173 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kenwood Audio & Video Receivers Experts

 Elex
Elex

Level 2 Expert

49 Answers

ask_not

Level 1 Expert

28 Answers

Fbcgilly

Level 1 Expert

13 Answers

Are you a Kenwood Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...