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The amplifier denon dra f109 is in protection mode (red light blinking). Disconnect speaker’s cables don’t solve the problem. Please help me to locate the wrong parts. I don’t have the service manual. Thanks in advance! Juan
Unplugged all cables Press ‘power and preset call buttons together Plugged sector cable while pressing those buttons You must see “protection : power" Press preset call button a few seconds. You will read something like “no protection, system clear" Press power two Times and then… I hope you will understand, i’m french.
disconnect power cord, press and hold “on/off button” and “preset call” button simutaneously and then reconnect power supply cable…device will reboot and show “initialize” on display. press “preset call” button again and it will reset
service manual link https://www.scribd.com/document/32950292…
The typical reason for protection mode is shorted output transistors which are the last amplification stage of the unit. In this case, the amp section is a single IC (TAS5142). This IC likely has failed and requires replacement. Follow the guide in the manual referenced in the other answer to replace this IC. If you are not comfortable with this repair, please get assistance from a local service provider. Please keep us updated on progress.
