Į.Use a solder blob to short pins 3 and 4 of this connector. In this step we disable the mute (permanently).ī.Take off the top case (as described in the service manual)Ĭ.Unscrew the back panel (a lot of screws!)ĭ.Remove the DSP card to give access to connecter CX114 on the base PCB. The electronic mute used is not infinite, hence why the test in step 1 works. I think what was happening on my system was that because the main DSP was failing (probably due to the ROM failing as described elsewhere) the microcontroller was then muting the signal. Some are electronic and some are electromechanical (i.e. There are a couple of places in the audio signal path that the system can mute the sound. Step 2 - disable the mute which is in place G.Note if you do any other adjustment to sources at this point then you will have to power-cycle the system. phone, MP3 player, computer) ĭ.Turn up the volume to around 0dB - you should hear nothing.į.Only adjust the main volume, turning it gradually up to +18db - you should hear the EXT.IN source signal coming faintly out the speakers. Step 1 - confirm your amp has the same fault symptoms as mine had:Ī.Connect a source to the FL/FR EXT. Power speakers A and or B, and potentially surround and sub as separate channels (have not tested).Use the amplifier to amplify an external (analogue) source.If you would like to re-use the following functionality of your amp then there is a fairly easy fix. However I noticed that in some situations (detailed below) I could hear very faint audio coming through the amp. I found my Denon AVR2802 had failed in the way described above.
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