Question about Samsung HT-DB120 System

1 Answer

HT-DB120 - PROTECTION due to shorted output stage

I have the same problem on my unit. One day whilst playing for @ 20 min. the system stopped with "PROTECTION" displayed. On opening the unit I could not see any symptoms of the failure, like shorted cap or component and I checked all the power transistor modules with a multimeter and they did no indicate a short. After keeping it for 3 weks I powered it on yesterday only to notice a small whiff of smoke come out near the middle (biggest) power module. However no burning smell, nothing. This tells me that one of the output modules or transistor in the module is shorted. I did not have the time to desolder this and try powering on but this is the cause of the auto PROTECTION trip. Cause: Shorted power output stage that drives the speakers. I will update this as i have time (and patience) to desolder each module and test which one is fired up. Then the next thing will be to get an equivalent replacement transisitor to repair it. Anyone who can add more value to this is welcome to share their "repair" experience.

Posted by on

1 Answer

Re: HT-DB120 - PROTECTION due to shorted output stage

I have the same problem. was playing a cd for my son for about 20 mins. CD started skipping then froze up and shut off. When trying to power on the word "PROTECTION" comes on then shuts right off. Is there any solution for this problem? My husband bought this when it first came out over 6 years ago at $400. I bearly even use it. It's a waste to throw away. Please someone help. Thanks.

Posted on Apr 29, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

2 Answers


It's a known issue with samsung Home Cinemas. It has to do with the cooling of the device and other related issues. One of the bellow could solve the problems.
First thing is to reset the device:#1 - Make sure there's on dvds in the system
#2 - Put it on stand by
#3 - Hold down the STOP button on the UNIT
#4 - HOLD until you see the stand-by light flash
#6 - This has now reset the system

If that doesn't work try to do a firmware upgrade

Nov 21, 2011 | Samsung Home Theater Systems

1 Answer

After speaker wire touched. ht doesn,t stay on. it goes into protection as if it is over heating

The output was shorted and probably damaged the output stage of the amp. It's a service shop repair unless you know electronics and can get parts for it....

Mar 03, 2010 | Samsung HT-X40 System

1 Answer

Protection Error on power up

your cooling fan has failed. Check the back of the unit for exhaust air coming out. If not replace fan.

Nov 23, 2009 | Samsung HT-DB120 System

1 Answer


what brand cd is it is it in right formatt or just reg music cd

Jan 10, 2008 | Samsung HT-DB120 System

1 Answer


cheapest and most logical start to the solution is to replace the optical block. looks like its focal point is drifting at a certain temp.almost impossible to pick up that problem without having that problem before. if i can advise,when you recieve the new part, unsolder the small bridgepiece that they put in for protection. if you dont, the unit will never work.

Aug 24, 2007 | Samsung HT-DB120 System

1 Answer


See my post "HT-DB120 - PROTECTION due to shorted output stage "

Jan 02, 2007 | Samsung HT-DB120 System

1 Answer


Try disconnecting the speakers one at a time. You may have a shorted speaker. If all are disconnected and it still does not come on, then, you probably have a shorted output.

Dec 13, 2006 | Samsung HT-DB120 System

4 Answers

Protection displayed and shuts off

are all the speakers good?? discont all the speakers and see if all the lites come on. Then shut off and start to connect one at a time untill the unit shuts down and then you know you have a shorted speaker. If the same thing happens you probably have a power supply or an output stage falure and this should be serviced by someone who is quilified to work on stereos

Apr 05, 2006 | Samsung HT-DB120 System

1 Answer

System switches itself off

The HT-DB120 has an automatic shut down that should turn off after 20 min of idle mode, it seems yours is malfunctioning. try disconecting the DVD from power for a few minutes.

Jan 07, 2006 | Samsung HT-DB120 System

1 Answer

Protection displayed on screen

See my post "HT-DB120 - PROTECTION due to shorted output stage "

Nov 08, 2005 | Samsung HT-DB120 System

Not finding what you are looking for?
Samsung HT-DB120 System Logo

698 people viewed this question

Ask a Question

Usually answered in minutes!

Top Samsung Home Theater Systems Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

5327 Answers

Brandon M.

Level 1 Expert

34 Answers

Are you a Samsung Home Theater System Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides