croissantking's conquests

[pizzigri]

No, but I can try to remove both original audio ports from a fried board I have…. Possibly even the SCSI port. dunno about the choke though.

 

[pizzigri]

Drop me a line…

 

[MBehr]

This looks so much better than what I would have expected! Good luck with the Egret…

 

[croissantking]

Progress with my spare 840AV board. I discovered why it wasn’t outputting video. It turns out the DAC (or what I think must be the DAC) wasn’t receiving a required -5V input. I traced this back to the voltage regulator that was instead outputting 0.65V. Yeah, that’s not going to work. So I checked its input and found 0V, but it should be -12V. Aha! There’s a break in continuity of an internal trace running back to the -12V pin of the PSU.

One bodge wire later, and I’m
now getting video output:



Another issue I was having is resolved too, namely that some Nubus cards weren’t working. This was due to the missing -12V feed.

There’s one outstanding issue with this board - sound output doesn’t work. Well, it does chime, but it dies once the OS has loaded.

 

[croissantking]

Swapped out the audio amp and the sound is fixed! This board is REPAIRED.

 

[jmacz]

So awesome!! and those traces are so tiny! Congrats!

 

[Callan]

Congrats on getting this one fixed! I've had nothing but headaches working on these boards, so I know what you went through to fix it. Amazing job!