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See the above link for more info on testing diodes. Focus mind and suspection are two of the keys to electronic repairs.Good job. Next I removed the motherboard from the system and scanned the bottom side and again nothing seemed suspect.
PUSH POWER / PROTECT / PROTECTOR is flashing in the display of the home audio device. Unplug the AC power cord for about 1 to 2 hours to reset the output transformers. Disable the surround sound option if both the A and B speakers are being used simultaneously. Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display. In my case I came across to power supply fault.with 3 different DVD power supplies.
Sony Home Theater Push Power Protect Error Solved
Actually it's voltages to amplifier that will be missing. These voltàges they switch amplifier of the DVd. These voltàges are created on the secondary power supply. These are my fault findings Thurs far. Pro job with hopefully a safe ending as soon as the ordered chip has arrived and is added to the circuit board.
If the impedance is not correct, sound will not come out properly and the speaker may be damaged. If speakers that are within the recommended impedance range, check the connections. If the speakers being used is within the suitable range and is still not working, there may be a malfunction or some other flaw within the speakers. Test by using a different set of speakers if available. If the impedance is not correct, the speakers will not work properly and may be damaged.
PUSH POWER / PROTECT / PROTECTOR is flashing in the display of the home audio device.
If there has been an electrical surge or power outage, then the internal surge protection inside the home audio device may have been triggered to protect the device from the surge. To reset the internal surge protection circuit unplug the AC power cord from the wall for at least 30 minutes. Make sure the speaker impedance is within the recommended range.
It looks like JavaScript is disabled in your browser. To get the full experience on Sony.com, please change your settings to allow JavaScript. PROTECT and PUSH POWER flash alternately on the amplifier screen.
PROTECT or PROTECTOR is flashing in the display of the home audio device.
If the speakers are within the recommended impedance range, check the connections. If the speakers being used are within the suitable impedance range and they are still not working, there may be a malfunction or some other flaw within the speakers. So I applied the power and the machine came up beautifully and then displayed “push power protects” on the screen and with that I confirmed the customer complaints. I took the machine with me to my workshop, opened it and did visual scanning and nothing seemed suspect. Sony home theater receiver model HBD-DZ810 came in with “push power protects” error now repaired.
I explained this to the customer and requested him if he can be using the machine without one amplifier and he agreed. I took the machine back and paid me ¾ of the total charges, we agreed that when the market is back to normal will replace the faulty I.C. This customer was referred to me by another customer whom I had repaired his Sony Bravia television which had backlight problem. If model-specific information is needed to complete any of these steps, refer to the instruction manual with the product.Manuals are posted on your model support page. PROTECT or PROTECTOR is flashing in the display of the home audio device.
Sony DAV-HDX466 "Push Power Protector" Flashing on Display
Raising the volume with a low impedance speaker will trigger the protection circuit. Ensure the top of the home audio device has proper ventilation to keep it from overheating. Running the home audio device in a poorly ventilated cabinet can trigger the protection circuit.
After testing the machine, the client was happy and I left it at that, now it is over one month and customer has not called with any complaint and therefore I hope he is still enjoying. From the circuit diagram I was able to see the diode was actually a 39 volts Zener diode, having no smd 39 volts Zener diode I bought an ordinary 39 Zener diode and replaced it. I tested the power supply and found it was okay and all the output were within the expected range. Volume is set to maximum and cannot be adjusted on the Apple AirPods when connected to the home audio device.
To be sure I lifted one pin from the circuit and re-tested again and still got the same reading . Since this diode was at the output of the amplifier circuit I was very sure this was the cause of the problem. The diode of labelled D3101, to be sure the exact diode type I had to google this model and I got the service manual from the internet effortlessly. I have a Sony Hometheatre D340 which has same problem I put it on plays for like 20 minutes then goes off and displays push power protect on the LCD screen.
Replace low impedance speakers with the correct impedance to prevent this from occurring. Yes, the diode had same reading both in circuit and out of circuit both ways, actually had a beep. Always testing suspected components off the board is good practice else it is very time consuming process specially in laptops. Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. If you have electronic repair articles to share with us, please contact usHERE.
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