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Samsung max ws750

When putting the power on my samsung max ws75o the message comes up saying protect on and the unit powers off

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The following is generic for any of these recievers with the fault you are describing.

The output stage, and also incuding the driver stage on one or both of the sound channels most likely has shorted output devices. This can be either output transistors, or output IC's depending on the design.

When this type of short occures, usualy the driver transistors or driver IC's, and other support components may be damaged.

The cause is usually from driving the amp too hard, or operating in too warm an environment, or using speakers that are not of the correct impedance for the amp.

An experienced tech that works on audio equipment at the component level should be able to service your amp. The cost may be on the expensive side depending on the parts that are damaged.


Jerry G.

Posted on Apr 12, 2008

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Onkyo tx-ds656 stand by power light comes on volume control knob rotates to max but display or unit wont start


Try factory reset: while holding the(CD) button on front panel,press (POWER) button.
After "Clear" is displayed the unit should be back to its factory default. :) If this dont work for you take the unit to be checked by service . :)

Jan 24, 2014 | Onkyo TX-DS656 Receiver

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Turning it on the onlything it says is Welcome Protector and does nothing else


Is the message "Protector" or "Protected"? Several models will say Protected if there is a voltage/power issue with either the unit or the speakers attached.

This can be triggered by a short in a wire to the speakers or to the unit itself or a blown fuse inside the unit. Unplug the receiver from the incoming power from both the receiver and the outlet, if possible. (This applies if it is a free-standing unit; units in cars are different.) Then unplug the speaker connections. Reconnect the AC power and attempt to turn on. Does the error persist? If it has been resolved, plug in the speakers one by one. If you get the message as you plug in the speakers, check the wires for a short. Check if your speakers are drawing more power than the receiver is capable of handling. (This only applies if the speakers are directly connected to the receiver.)

If the message occurs before you plug in the speakers, check for a problem with the ground as well as for a short in the rest of the power connections on the unit. If there is no obvious damage, then if the unit is still under warranty, consult the manufacturer for a warranty repair. Otherwise you'll need to open the unit and check the circuitry. (Replacing the fuse may work. However it will not resolve the problem if there is another problem that is causing the fuse to blow.)

I hope this helps. Please add a comment with the make/model and specifics of the receiver for more information.

Cindy Wells

Dec 17, 2011 | Audio Players & Recorders

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 Players & Recorders

1 Answer

I have model #SA-GX190. Max volume level is 20 on this unit. When I put the level up to 5-7, the unit shuts down and displays "Overload" on the from panel. What causes this and what can be done...


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.

Jul 23, 2011 | Technics Audio Players & Recorders

1 Answer

Display says protection and turns off. Why?


The protection message means that a fault has been detected. The unit turns off to protect the rest of the system. Depending on the timing of the message, you could have an overvoltage at one of the boards, a problem with one or more of the speakers or a thermal issue. (The first two will trigger the unit turning off as soon as it is turned on. To check if the speakers are the culprit, unplug them and see if the receiver powers up properly.) If there is a heat build up, the unit will turn off after being on for a while.

The service manual is available for a fee here: http://www.free-service-manuals.com/Onkyo_TX-SV646_Service_Manual_L44672/ .

I hope this helps.

Cindy Wells

Jul 17, 2011 | Onkyo TX-SV646 Receiver

1 Answer

My jvc is not working at max volume,on the screen appears OVERLOAD,the sound stops and i have to turn it 0FF and turn it ON again. Model RX-5020 VBK ,is an older model but i dont know what year.


If you're needing to run it at max volume something else is afoot.

ANY amplifier has specs. Those specs are at a certain output into a certain load yielding a certain amount of distortion. That is not to say it can't push more power. But you can be sure the distortion figure will rise almost vertically as the power spec is exceeded. Eventually the signal will clip and now we're talking about danger to the amp and the speakers. Protection Circuits are designed to detect and intervene in these cases.

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 possible root cause for intermittent shutdown.

Jun 19, 2011 | JVC RX-5020VBK 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

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

Sir my amp comes on and shut off


One of the amplifiers many protection circuits has been tripped. Which one it is may be tought to discern. Is there any message on the display? Could be a power supply proection circuit or possibly an output overload protection circuit. Have you disconnected the speakers and all other source inputs and outputs to verify if the unit still goes into protection?

Jan 28, 2010 | Yamaha RX-V663 Receiver

1 Answer

"Protection" comes on when powering up unit.


WIthout having the model number, I can't give you details, but the message indicates that a problem was detected in the final stage of the amplifier. The unit shuts down and displays the message to prevent further damage. Please update this with the model number and I should be able to provide more details and repair instructions.

Dan

Dec 18, 2008 | Audio Players & Recorders

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