Troubleshooting and repairing the issues with the audio filter in the Amiga 3000T.

A3000T Restoration Series: Part 1 - Teardown and Inspection: https://youtu.be/5XsMTA0ZjhQ Part 2 - Removing Battery Corrosion: https://youtu.be/tiTvgsuXqGc Part 3 - Board Repairs & Smoke Test: https://youtu.be/_DvfH7xoIy0 Part 4 - Recapping the Power Supply: https://youtu.be/uKZePkkBd9g Part 5 - "Repairing" the Power Supply: https://youtu.be/tmh7QATsD0U Part 6 - More Capacitors & More Audio Problems: https://youtu.be/HZDW2SLB47k

TIME STAMPS: 0:00 Introduction 3:33 Repairing the Audio Voltages 13:39 Repairing the Low Pass Filter 41:55 Thank you & Good Night

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Thanks for watching!

#JanBeta #Amiga #Amiga3000T #Amiga3000 #A3000T #Commodore #Restoration #Audio #LowPassFilter #Schematics #Repair #Troubleshooting #VintageComputing #RetroComptuting #RareCommodore

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[–] 1 point 3 months ago

Well done, Jan. Surely a tricky problem to solve. At first, I thought the first capacitor you changed was not the C431 but the C433 from the schematics because that is actually 22uF and it is also connected with the pin 7 on the U402.

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  • [–] 1 point 4 months ago (1 child)

    That is an absolutely wild error to be made at the factory. Well done though - you persevered and won! Great video as always :)

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  • [–] 1 point 4 months ago

    They haven't produced that many A3KT's eh? So that may probably explain the bug or super-feature making this Amiga different from the others :)

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