Question about Sony boom box micro midi mini-fi systems MHC-EC99i User Manual

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How to reset my sony ec99i

PROTECT keeps flashing when i try turning it on

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

ginko
  • 19396 Answers

SOURCE: Protect keeps flashing

Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

Posted on May 29, 2009

smarthome2
  • 1114 Answers

SOURCE: Sony STR-D665 receiver display flashes "PROTECT"

The most common problem found on FixYa for Audio Video Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Posted on Jun 07, 2010

dunnbiker
  • 8546 Answers

SOURCE: every time i plug in

Generally speaking, an amp protects 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.

Posted on Mar 16, 2011

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1 Answer

How to remove protect from my cd receiver display, model HCD-EC99i?


When the protect indicator comes on, usually a power transistor has blown. The unit needs to be taken to a repair shop.

May 04, 2017 | Hardware & Accessories

2 Answers

Sony hcd-ec99i i have no sound from the speakers at all. I am not getting the protect message. please help


Check the simple stuff first

Is it muted?

Is the source selected sending signal (radio staion broadcasting, cd playing, ipod all the way ect)

Try doing some basic troubleshooting like,

see if all sources available yield the same result (TV, Radio, CD, Ipod, Aux jack)

When you turn the volume all the way up, do you hear an audible hiss from the speakers?(or use a test tone) If so, your amp is working and the problem is, your unit is not sending any signal to it.

If possible hook up your speakers to another system to rule them out, however I doubt that is your problem.

Here is sony's recommendation and a review video

Let me know what you get

SONY eSupport How to troubleshoot if there is no sound or intermittent...



Feb 03, 2014 | Audio Players & Recorders

1 Answer

PS3 Controller Keeps Flashing


Does the controller actually turn on and if not you have to connect it to the ps3 or whatever your connecting it to

Oct 16, 2013 | Sony PS3 DualShock3 Wireless Controller...

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Hi I have a Sony MHC-EC99i when I plug in the power cord it show "Protect" even I had nothing is connected to the unit,what shall I do now ,thanks.


If it's showing 'Protect' without any Speakers connected then you've got a fault with the Amplifier.

Depending on your Technical ability you could remove the outer case and have a look at it yourself. It could just be blown Capacitors on the Amplifier PCB or could be worse and require complete new PCBs if they are available for this model.

Jun 06, 2011 | Sony MHC-EC99 Audio Shelf System

1 Answer

Every time i plug in my mhc ec99i it will click 3 times then say protect


Generally speaking, an amp protects 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.

Mar 15, 2011 | Sony MHC-EC98Pi Shelf System

1 Answer

I have a sony LBT - LX 10AV and a Sony LBT ZX 10D, i live in the outback and cannnot get to a techncian for 2000km. Both systems are stock on power protect. the 10A goes straight to power protect and was...


Hello, if you have the manuals, go to page 54 or at this site http://www.docs.sony.com/release/LBTLX9AV.PDF if not try resetting them, for the 10av. It says to unplug it, plug it back in(I'd wait like 10 secs), then press clock set-enter-on/off at the same time. Keep in mind when you reset you will lose all saved information.
Ok, This is all I found so far. I would try the reset instructions on both units. I can't find the manual for the ZX 10D.

Jun 15, 2010 | Technics SA-AX530 Receiver

1 Answer

Protect flashes. I reset as manual instructed. I


Don't forget to disconnect your sources also(dvd,satellite,vcr,cd player,etc) they could have a short in any of them causing receiver to go into protect,If still flashing "protect" your Sony could have an internal short of it's own, or caused by an external short previously mentioned. Good luck !

Nov 27, 2009 | Sony STR-DE695 Receiver

1 Answer

Protect keeps flashing


Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

Apr 23, 2009 | Sony STR-DE475 Receiver

1 Answer

Flashing message on my reciever


PROTECT, PROTECTOR or the letter P is flashing in the display of the A/V receiver. Solution
sp.gif sp.gif Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.
  1. Check the speaker wires and speakers for proper connections.
  2. Reduce the volume level. IMPORTANT: Ifthe receiver is played back at maximum volume level it may enter theprotect mode. Maximum volume listening will cause the receiver to runvery hot and may drain the output capacitors.
  3. Disable the surround sound option if both the A and B speakers are being used simultaneously.
  4. Ensure the top of the receiver has proper ventilation to keep it from overheating.
  5. If the message only occurs when using a DVD player, the sampling frequency may be set too high. IMPORTANT: Somereceivers provide compatibility with the higher sampling frequenciesthrough alternate connections. Consult the owners manual for specificinformation.
  6. Unplug the AC power cord for about 1 to 2 hours to reset the output transformers.
If the issue is still unresolved, service may be required. The Sony® eService Web site at http://eservice.sony.com/ can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer.

Dec 15, 2008 | Sony STR-DE545 Receiver

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