Yamaha RX-V385 user manual

There could be several reasons why your Yamaha receiver keeps shutting off. Some possible causes include:
1. Overheating: If the receiver is not getting proper ventilation or if its vents are blocked, it can overheat and automatically shut off to prevent damage. Make sure the receiver has enough space around it to dissipate heat and check if its vents are clear from dust or any obstructions.
2. Speaker impedance: If you have connected speakers with an impedance that is lower than what the receiver can handle, it may overload the amplifier and cause the receiver to shut off. Check the speaker's impedance and ensure it is compatible with the receiver's specifications.
3. Faulty wiring or connection: Poor or loose wiring can cause intermittent power interruptions and lead to the receiver shutting off. Ensure that all cables and connections are secure and properly connected.
4. Power fluctuations: If your power supply is unstable or experiencing fluctuations, it can cause the receiver to shut off. Consider using a surge protector or voltage regulator to stabilize the voltage going into the receiver.
5. Firmware issues: In some cases, outdated firmware or a software glitch can cause the receiver to behave unexpectedly. Check if there are any firmware updates available for your Yamaha receiver and ensure it is up to date.
If the problem persists despite these troubleshooting steps, it may be worth contacting Yamaha customer support or consulting with a professional technician to diagnose and resolve the issue.

PCM stands for Pulse Code Modulation, which is a method used to digitally represent analog audio signals. In the context of a Yamaha receiver, PCM refers to the digital audio format that is used to transmit audio signals from a source device, such as a Blu-ray player or a gaming console, to the receiver. When PCM audio is received by the receiver, it is decoded and processed in the digital domain before being converted back to analog for playback through speakers.