Question about Sony DAV-C770 System

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Protection message appears on screen

HCD-C770
S-Master
5.1 Digital Amp

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Speaker protection circuit malfunctioning or turnd on for protecting the speakers from faulty output section.
give it to repair proffesional or we will try together to repair it.
are you technicali sound .
(electronics)

nuwan.......?

Posted on Jan 12, 2009

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Sony surround sound


Protect on a sony usually means there is a problem in the amp section. On that model, it would probably need to have the entire amp pcb replaced.

Jun 11, 2013 | Audio Players & Recorders

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My sony compact av system,model dav-c770 is stuck on stand by mode.wont power up anymore


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 'nekkid'. 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 another possible root cause for intermittent shutdown

Aug 12, 2011 | Sony DAV-C770 System

1 Answer

Our Sony c 770 no longer plays DVDs or Cds but it still works as a receiver. Can we connect a DVD player to it and have it come thru the 5.1 speaker system?


Hi,
Yes, tis unit has 2 video inputs at rear so you can connect any other dvd player sound (analog or digital) to get 5.1 channel surround sound from DAV-C770 speakers.
Click Sony Support to download user manual copy of DAV-C770 that has more details about connection setup.
Hope this info will help you.
Thanks.

Nov 26, 2010 | Sony DAV-C770 System

1 Answer

The DVD player will stop playing and the message


It is possible that your system is gettting overloaded and makes the sfety cicuit switch off . This is the protecction circuit to prevent further damage and fire within the system particularity when the output or power is shorted. Check from the speakers for short remove and test . Also use a multimeter to test for short in the output drive. If so disconnect and see if the protect releases. Then you must replace the outputs. Check also the protect cicuit for a false alarrm due to wrong biasing. Hope this advice helps to figure out. Good day

Jul 20, 2010 | Sony DAV-C450 System

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Sony HCD-BC150 As soon as I turn it on, it shuts


Change the audio amplifier IC are on short circuit and that´s the cause your device goes to protect mode

Aug 11, 2009 | Sony DAV-BC150 System

1 Answer

Sony DAV-C770 Red light flashes but nothing comes one


i think power amp or power supply board problem.if you are not the technician dont do anything.one thing remoove the all speaker wires and try to turn on agin.
nuwan.

Jan 19, 2009 | Sony DAV-C770 System

1 Answer

SPEAKER WIRE CONNECTORS


You need 5 Cord (wires) Connection to attache all speakers.
You can have all 5 cords in one package or each cord individually at Sony Accessories.
Please write model number DAV-FR1 in search box to get result on above web page.

Details of wires required.
182724411 1 BAG = 5 CORDS approx $43
179146811 CORD, CONNECTION approx $10.30

Nov 10, 2008 | Sony DAV-FC8 System

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PROTECTION MODE


i have the same problem also

Oct 20, 2007 | Sony DAV-C770 System

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