Diagnosis and repair of A3000 flicker fixer.
Category: Commodore
A1200 Rev 1B & A600 Rev 2B – Audio too loud
If the audio of your Amiga 1200 Rev 1B, A600 Rev 2B or maybe other revisions is too loud (not distorted), that is caused by two resistors. Tristan Zondag confirmed the A600 Rev 2B is also affected. R331 & R321 are 1,5K Ohm, while they should be 680 Ohm. If I test the output voltage […]
A4000DCr CF IDE adapter not booting, activity LED on adapter constantly on
@tbtorro Symptoms: IDE activity LED on the CF adapter constantly on, even if the motherboard itself is powered down (with IDE CF powered with external PSU). IDE booting intermittent. After about 30 seconds the IDE activity LED on the CF adapter would go half bright (with motherboard still powered off), at this point if the […]
Amiga 500,500+,2000,3000 drive selector switch
How does it work On the Amiga 500,500+,2000,3000 you can’t boot from the external (DF1) drive by default, so you need a switch so the external (DF1) drive will act as DF0: Switch position 1 (default) Internal Drive is DF0: External Drive is DF1: Switch position 2 External Drive will be acting as DF0: Internal […]
Compact Flash LED not working
Some Compact Flash (CF) to IDE adaptors fail to light up the drive activity LED, I was wondering why… I took a board and removed some components and did some measurements, and I discovered that the BOTH base pins of the NPN transistors are connected to ground. Huh?! That means that the transistors won’t switch […]