If we look at one side of the push-pull stage, we see that if Q703 goes short between its collector and emitter junctions, the voltage rail would flow through the speaker and ground, however, there is R716 in the path, which will go open. I … Free repair help Audio, Audio Systems - solve sony str de475 protect mode. Go online to Sony and enter the model number of your receiver and see how many watts it is capable of producing in each channel. If the issue is still unresolved, service may be required. Wonder of Wonders, it worked. It would require a hard short across the speaker terminals in order to damage them. I have a Sony STR-DE197 receiver. Plug the power cord back into the electrical wall outlet. Joined: Apr 30, 2011 Messages: 1 Products Owned: 0 Products Wanted: 0 Trophy Points: 1 Ratings: +0. The MP1620 is a PNP type, whilst the MN2488 is its complimentary NPN transistor. Protect mode repair Sony STR-DE675 Receiver amplifier. Ask for free help:: home:: add a question :: search:: help:: most recent:: unanswered Search: Go : Fixed for free! See if receiver still goes into protect mode with CNP920 connected. Tags: sony; Apr 30, 2011 at 10:39 PM . The audio power output design is class AB push-pull configuration, consisting of MP1620 and MN2488 pair of Japanese transistors manufactured by the Sanken Electric Company. This started about 3 weeks ago. Remove relay RY920 which is after those fuses. I was about to throw out a Sony surround sound receiver I’ve had for years because it would flash “PROTECTOR” on the display after being on for a few seconds, and I’d tried everything I could think of (cleaning, making sure no bits of wire in speaker posts, leaving off for hours or days, etc.). involves replacing power amplifier output transistors, emitter ... How to Setup Sony STR-DH800 Receiver Review. Jan 28, 2002 #3 of 16 John Garcia . Running the home audio device in a poorly ventilated cabinet can trigger the protection circuit. Running the home audio device in a poorly ventilated cabinet can trigger the protection circuit. Sucks…. When this initially happened a month or two ago, I reconnected all the speaker wires which temporarily resolved the problem--it worked fine. This still happens even after all speaker wires, etc are disconnected. Part of the protection circuitry are relays that disengage the speakers once the Sony has gone into auto-protect mode. Kenwood equips its receivers with a protection mode to safeguard them. The receiver will automatically turn off after a few seconds. Browse and shop online for Outdoor Security Cameras, Home Security Systems and more. If that doesn't work, disconnect the power lead from your receiver for 30 seconds and then reconnect it. Step. Switch on the receiver. solidworks step by guide , physical … Currently, I have to Bose 301's and 201's and a (kinda crappy) Sony center and subwoofer. Sony and the Environment How we’re reducing our eco-footprint through energy efficiency and recycling initiatives. The repair of a Sony STR-DG720 audio receiver in the protect mode. Joined Jul 24, 2000 Messages 5,058. After 3 times goes into protection mode. It basically said open it up, clean out the dust, and then disconnect and reconnect every connector you can get your hands on. To reset the internal surge protection circuit unplug the AC power cord from the wall for at least 30 minutes. Beznuk, Apr 30, 2011 #1. but it still says protect, push power. Consumer Electronics. Red Power LED was blinking after the power on, when preliminary display round is over. If the receiver shuts off and goes back into protect mode you will need to contact your Onkyo dealer. NOTE: If the A/V receiver does not display PROTECT with all the components disconnected, turn off the A/V receiver and connect one component at a time, turning on the A/V receiver between each connection, to see what component is causing the A/V receiver to go into the PROTECT mode. Joined Jun 24, 1999 Messages 11,571 Location NorCal Real Name John Unplug it for a while. However, serious problems might occur if you modify the. Ensure the top of the home audio device has proper ventilation to keep it from overheating. I have a sony receiver that keeps going into protect mode. involves replacing power amplifier output transistors, emitter resistor and base drive resistors. Eshak Bhatti. Sony Music Classic artists to today’s stars, local and global. If the issue is still unresolved, service may be required. Is there anyway to get it out of PROTECT mode, without having to change some part inside. Beznuk. The protect is there to protect the rcvr and you from a more costly mistake. The STR-K740P protect error usually occurs in the form of "PROTECT" flashing on the display, and this article looks into how to fix this error and bring the amplifier out of this mode. Especially if your microphone was already working fine before with the same. Take it to a Sony approved technician to get it repaired. Let the amplifier cool for 15 minutes and then switch ON to see if the message still appears. This together with a state-of-the-art Japanese electronic protection mechanism ensures that they will survive for many years. NOTE: If the A/V receiver does not display PROTECT with all the components disconnected, turn off the A/V receiver and connect one component at a time, turning on the A/V receiver between each connection, to see what component is causing the A/V receiver to go into the PROTECT mode. When the transistors go short between their collector-emitter junctions, it creates a path from the positive voltage rail to ground -- or negative rail to ground, in a split voltage system -- and the only resistor in this path is this non-flammable resistor, which goes open. PROTECTOR as soon as I turn it on. Plug the power cord back in and then power then turn on the receiver. If the impedance of any of the speakers is below the rated impedance range indicated on the rear of the home audio device next to the speaker connections, the home audio device may enter the PROTECT mode. I couldn't find a fuse to replace so I put it back together. Browse and shop online for Outdoor Security Cameras, Home Security Systems and more. If the message goes away, then you need to make sure the speakers are not short and correct impedance. The manual says I have a short-circuit problem. Sony Audio Receiver in Protect mode Repair Fix STR-DG720. I’d already vacuumed out the inside (which wasn’t really dusty anyway), but proceeded to disconnect and reconnect every connector in there, and there’s a BUNCH. Your stereo receiver is going into protection mode because the receiver has an internal short, a speaker is bad or the speaker wiring has a problem, such as incorrect wire gauge or bad connections. To reset the internal surge protection circuit unplug the AC power cord from the wall for at least 30 minutes. NOTE: If model-specific information is needed to complete any of these steps, refer to the instruction manual with the product. The rest does not fix it. Protect mode repair Sony STR-DE675 Receiver amplifier. When you see this message, the first thing to do is to switch OFF the amplifier immediately, and disconnect the speakers from the terminals, at the amplifier end. Press and hold the STOP button and folder minus button at the same time until the word RESET appears on the display panel. How To | Remove "Protect Error" on a Sony receiver - YouTube Comments. Reconnect the power cord after at least one hour has passed. Press the power button to turn on the stereo system. Sony Audio Receiver in Protect mode Repair Fix STR-DG720 All Articles Posts FAQ Pages The repair of a Sony STR-DG720 audio receiver in the protect mode. Especially if your microphone was already working fine before with the same. However, serious problems might occur if you modify the. I have a Sony HT-DDW840 receiver and last night I heard a little crack and it went into a "protect" mode. The purpose of the protect error is to protect the amplifier components from damage should a short circuit occur. NOTE: If model-specific information is needed to complete any of these steps, refer to the instruction manual with the product. Tutorial: Learn how to turn captions on or off when watching Internet videos from YouTube . There is no way to bypass the Protection mode other than fixing the problem. 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