Comments (1)
darrenfreeman
commented on June 8, 2024
Note that the addition of the A4000 CD header introduced a design flaw - C433/C443 (final AC coupling capacitors) have a reversed DC voltage under most conditions. The usual fix is to reverse these caps during recapping, however I think it is possible for software to deliberately reverse this voltage again with properly chosen DAC outputs.
This defect is not especially serious, as the voltage is only about -1.1 V. Still, it should not have been in production like this.
from amiga-2000-eatx.
Related Issues (20)
- BOM Change
- 8375 Agnus Support HOT 25
- Enhancements to the internal floppy connector HOT 5
- EMI filters HOT 2
- Looking to borrow or buy certain 8375 Agnus parts HOT 4
- Board may not boot on all VGA monitors HOT 8
- Flickerfixers and scandoublers do not work correctly in videoport HOT 19
- Crowdfunding of assembled boards HOT 2
- Note on U109, XCLKEN HOT 2
- Increase Slot Through Hole Size HOT 1
- A500 - ram-expansion port HOT 1
- U103 and U105 - Timing concern and updated BOM. HOT 1
- 20 pin ATX power supplies and SMD oscillator HOT 1
- C305 Improperly Labeled HOT 1
- Buster _D2P Pull Down HOT 2
- Q: Will there be any chance of getting hold an mostly ready board for us with disatreous soldering skills? HOT 2
- Amiga 2000-EATX rev 1.2.1 reset troubles HOT 1
- wrong termination on Zorro II bus pin 96 HOT 2
- Polarity of C408 (-12V Rail) HOT 2
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from amiga-2000-eatx.