Question about Sony DAV-SB300 System

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Need to unlock sony dav-sb300 - Sony DAV-SB300 System

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3 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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muntejaya
  • 10421 Answers

SOURCE: Need an unlock code for Sony dav dz 280

Hi, kindly get the code here : www.regionfreedvd.net/ www.dvdripper.org/dvd-region-codes-vs-ntscpal/ www.regionfreedvd.net/players.html
www.dvdreviewer.co.uk/Forums/...region_code/page1
Best Regards, Jay__dre458

Posted on Feb 27, 2011

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ginko
  • 19396 Answers

SOURCE: MY SONY DAV-SB300 DOES NOT

Hi.

Check carefully power cord connection. That is often the reason for no power problem.

If the power cord is OK the problem is a defective power board. Sometimes it is possible to see visually that the power board is defective because the capacitors on board look bulged. Before testing the power board it is necessary to disconnect power and to discharge PSU capacitors shorting the capacitors contacts with a screwdriver. Example of discharge points are shown below:

ginko_15.jpeg

ginko_16.jpeg


After that, if there is nothing unusual at a glance, testing will follow reading impedance on single components and circuit. Testing starts from power cord impedance (it must read zero from plug's prongs to solder joints on PSU), resistors and diode in AC section of PSU, near to the power cord attachment. Next part of testing is done with power on, tracking voltage from AC section of PSU down to connectors in DC-DC section of PSU. For safety reasons testing must be done by a trained person.

Posted on Aug 18, 2011

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Could be component breakdown. If you can isolate and replace the bad ones you should be back to normal.

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