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I have a Sony bdv-e2100 home cinema set and it is giving a Push Power Protect mention on the screen. I have tried to disconnect all the speakers and the powersupply. Than I waited a few hours and connected only the power and the error still remains. Does anybody knows how to fix this?
AMP Board:
“protect” mode is there to prevent the speakers from damage. Basically the output lines are monitored to insure that there is no DC voltage present. DC voltage to a speaker results in heat which will damage the voice coil and thus the speaker. This is why there is usually a slight delay from the time the unit is turned on to the time you hear sound. In this case, I would suspect that the output transistors/amp pac have failed. Whether or not both channels have a problem, the unit will go into protect mode. If you follow the flow chart provided previously, I expect you to end up at the “replace AMP board” section. It is possible to repair the amp module, but that will take some investigation and perhaps specialized equipment. Hope this helps, Dan
@jorn try to follow the power check flowchart:
You do want to do as @jayeff suggested and post plenty of good images so we can try to assist you further. Update (12/14/2016) @jorn lets see if this will help you out. Sony BDV-E2100 schematic
Hello, The AMP Board of Sony BDV E-4100 got burnt. Unable to find a replacement board. Is there a way I can use the speakers (5.1) with other systems?
Hi @jllitter , I believe that you’re looking at it the wrong way. The +32.5V is initially supplied by the switching regulator and IF there is no protect signal in evidence then the enable signal will be sent to the switching regulator. Here are some images taken from the service manual. It is in a mixture of Portuguese and English but you should still be able to read the circuits. To download the manual, click on the link above and then click on the “I am not a robot Captcha box” below the Document preview box, pass the test and then click on Go to Download. Wait until the sentence This file is downloadable free of charge (5/day): …processing… changes to This file is downloadable free of charge (5/day): Download (sony bdv-e780w w980w e985w) and then click on Download. Be patient as it takes a little while to find the file.
(click on images to enlarge for better viewing) The first image shows the +32.5 V coming from the switching regulator. The second image shows the +32.5V being supplied via a zener diode, to the “protect detect circuit”, the output of which goes into the system controller and to the switching regulator. The third image shows the +32.5V volts entering the AMP board from the regulator. There are no other +32.5V supplies in the device. Did you try a “cold reset” to check if this has any effect? See p.21 in the manual.
I know this is old but does any one know the voltage rating of the 4 larger SMD capacitors that are in line with the amplifier IC? The Diagram says they are 1uf so I purchased some 50v 1uf ones and they are much smaller.
In my case (probably also in yours since SMD ceramic capacitors often go short when they die) the capacitor was the cause and not the syndrome. Voltages were OK on mine and the system worked with the amp board disconnected. It did also work with the burned capacitor removed. Looks like the caps only have some high frequency filtering purposes. Unfortunately I was unable to get the correct size and shape so I had to touch the neighboring cap with the replacement ceramic capacitor. No problem in this case because C3108 are C3109 are connected in series anyway. System is fully usable again! Possibly as well as just with the faulty cap removed and cleaned up, but the caps are cheap and available so I highly recommend to replace. Be careful to use types that are capable of standing 100 V. Capacity needed is 2.2 µF.
“stop" and “vol -” to try cold reset solved my issue.
I have a Sony BDV e4100 showing push power protection , Service center recommended for the replacement of power amp board . any other solutions you can suggest
Reading through y’alls info and I was able to find my problem after opening up the case. I tried the cold reset to see what it would do and it lit up the Amp board like a Christmas tree. I haven’t seen a board go up like that since 99 when i took A+ certification in high school as a collage course lol. Unfortunately I found 1 replacement board for $117.97 so I guess I’m in the market for a new unit.
