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Amiga 4000 audio repair – Vintage is The New Old
https://www.vintageisthenewold.com/amiga-4000-audio-repair
[youtube Bc5HRF7zjiA nolink] RetroGameModz made a video about the audio repair of an Amiga 4000. In the video you can see many tips and working methods for repairing retro hardware such as: Visual inspection, audio filter circuit, testing, schematics, measurements, disassembling, new components, modifications and final testing.
Amiga Technical Resource - A4000 audio circuit repair
http://amiga.serveftp.net/audio_repair.html
A guide to repairing the Amiga A4000 main board audio circuit. This section will cover how to diagnose and repair common faults with the audio circuit, typically caused by leaking surface mount electrolytic capacitors. PLEASE NOTE that this information is specifically for the A4000D, but theory and repair notes can also be applied to other models.
Amiga 4000 badly Distorted Clipped Saturated audio Repair ...
https://www.nightfallcrew.com/28/10/2015/amiga-4000-badly-distorted-clipped-saturated-audio-repair/
The Amiga sound now works very well. I have repaired several Commodore Amiga 4000 with the LF347 burned and from my personal experience can say that the acid leakage of capacitors C404, C433 and C443 make some short circuits on pins of the LF347 that obviously dies. Audio before and after the repair: Amiga 4000 audio before the repair (812)
GadgetUK164 – Commodore Amiga 4000 Repairs – Part 2 - The ...
https://theoasisbbs.com/gadgetuk164-commodore-amiga-4000-repairs-part-2/
This is Part 2 of a multi-part Amiga 4000 repair series. This A4000 has a number of issues needing repairs including but not limited to: Corrosion related repairs. Missing audio. Problems with mouse and joystick ports. Black screening. RAM issues. and more.
GadgetUK164 – Commodore Amiga 4000 Repairs – Part 3 - The ...
https://theoasisbbs.com/gadgetuk164-commodore-amiga-4000-repairs-part-3/
This is Part 3 of a multi-part Amiga 4000 repair series. This A4000 has a number of issues needing repairs including but not limited to: Corrosion related repairs. Missing audio. Problems with mouse and joystick ports. Black screening. RAM issues. and more.
Amiga 4000 Repair Part 1: Recapping and RAM issues …
https://www.youtube.com/watch?v=gkCDdSdSNu0
Recapping and repairing my Amiga 4000. It started with a flashing green screen, can I get this machine working?Part 1: This part!Part 2: https://youtu.be/mJk...
Recommended repair shop for Amiga 4000 recapping and ...
https://forum.amiga.org/index.php?topic=74061.0
Re: Recommended repair shop for Amiga 4000 recapping and repair in the USA « Reply #4 on: May 17, 2019, 03:34:33 PM » I recommend Acill also, if you're willing to ship the board to Canada I can do it as i don't have much on my bench right now.
Amiga 4000 - already recapped, but no proper cleaning ...
https://www.tsb.space/bl0g/amiga-4000-already-recapped-but-no-proper-cleaning/
I got an Amiga 4000 to do the short fix for a ZZ9000 and some audio problems. More information about ZZ9000 short fix.. Can we call it audio? Lets see what the problem is with the audio area.. I use a 500Hz test frequency, and that doesn’t look good.. missing bottom.. hmm.. lets see.. Both +12V & -12V on the opamp are good, so that’s not ...
Amiga 4000 Hardware | John "Chucky" Hertell
http://wordpress.hertell.nu/?page_id=218
For the most usual version of the Amiga 4000: A4000_Rb_schematic. For the Cost Reduced version with onboard 030 on the motherboard: A4000CR_Rd_schematic. And for the 3640 68040 CPU Board: A3640_R3_schematic . The first thing you must check is: BATTERY, BATTERY, BATTERY.
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