20 Most Recent Sony DAV-DZ720 Theater System Questions & Answers

You must have changed the listing mode to stereo.In that mode only the left / right & subwoofer will work. Press the surround button and change it to any other mode .

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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.

On the display it flashes 'PUSH POWER PROTECTOR'

First try playing a CD. If that too skips you can clean the lens by opening it.Dust on the lens will effect all types of disc and will not be selective.
You can buy a lens cleaning disk from any Cd store and play it to clean.
The cleaning action takes place only if the disc rotates, so keep the top lid off to see if it rotates.
If you have crossed 500 hours of playing may be the lens is due for a change.

hi,
press the display button on the remote control, go to custom settings. then select video settings. in that menu select the system setting, change it to PAL.
ok

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Try a "Laser Lens Cleaner" preferably one that uses fluid, run that thru the machine a couple times. You can find them at just about any retail store that sells CD's/DVD's or electronics. Next, if you have any liquid car polish, take a couple drops and spread on the surface of the disc. Use a microfiber towel to clean off. This helps clean off smudges and protects the disc from scratches. And it works great on damaged discs too! If your discs still do not play, then the unit needs to be repaired or replaced. Hope this helps

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'Direct Drive' appears to mean something different to Sony unless the belt is for another function. https://lptunes.com/products/sony-ps-fl7-ii-ps-fl7-ii-psfl7-ii-turntable-tonearm-belt-replacement Service Manual

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There is not reason this would click and not turn on. If it just clicked, it would likely be caused by interference from another appliance, typically a fridge or freezer. The most likely reason is a relay in the internal power supply. It will need a Sony Service Centre. https://www.sony.com/electronics/support/res/manuals/4154/41545841M.pdf It isn't a recorded known issue. Sony are high quality equipment so it is worth getting it fixed. https://www.google.com/search?q=sony+icf-cl75ip+clicks+and+not+working ..

Open it up and look for bulging or split electrolytic capacitors, especially in the back to the display and the power supply. Or take to an electronics technician for diagnosis. https://www.google.com/search?q=Sony+deck+MHC+RV900D+not+working ..