Recent content by betaporter

Thanks! That would make sense, based on where on the board this chip is. 100% on this. The way this part failed, I'm guessing high voltage got to it. After I posted last night, the fuse also appears to have blown. I'm wondering if one of the transformers failed, but I'm not sure yet. I'm going...

My beloved Centris 650's PSU made a god-awful noise and died this evening while booting it up for the first time in a while. The PSU appears to have failed. Closer inspection reveals that, inside the PSU the IC at IC2 has blown. Anyone have any idea what this part might be? I did some Googling...

This is awesome, something I want to try to my own 610! Also... I'm screaming in leaky battery right now from your first image! :D

Ha, you are right. The other side of the cap in question is connected to -12v from the PSU. Thanks for the explanation!

I'm trying to restore a Quadra 610 with obviously failed caps. I've replaced the captors, but no boot, not chime, etc. While poking around on the board I noticed that the positive pad on C53 and C33 are connected to ground. Is that normal? And, I'm something of a noob to the hobbyist...

I've got this exact same symptom. Drive otherwise reads discs without fail. Did you try the above? Did it help?

Fantastic, thank you both for confirming. I've tried booting it with a PRAM battery installed, but I've realized now that I didn't test the voltage on the PRAM battery so I might have been testing with a bad battery. Something I'll double check this evening. Appreciate the quick replies!

I have a Quadra 610 I'm working on. No battery leakage, but obvious failed caps. I've replaced all the caps, but afterwords the machine doesn't boot, no startup chime and no video. I've found conflicting information online as to if the 610 has any onboard video ram. Looking at the motherboard...

Ahh, okay. That would be great news. I'll give that a shot!

My understanding is this is a filter of some sort, but I'm not quite sure what chip is at RC6 so I could be wrong.

I've got a Quadra 610 machine I'm working on, and while cleaning the pads on the capacitors I removed I noticed that the 11th pin on the chip at RC6 (assuming I have orientation right) nearest to the negative side of C46 is completely *missing*. I see the pad, but wither thou goest, leg? I have...

I've not tried that yet, but failing an obvious replacement source was thinking about it. I was posting here on the off chance somebody had stumbled on this problem before. :D

I've got what appears to be an otherwise working AppleCD 300i 2x CD-ROM drive from a Performa 6116CD. The laser assembly shuttle doesn't move properly, and I've found that the nylon drive gear is cracked - suspecting that's interfering with things. Does anyone know of a 3D-printed replacement...

In case anyone is wondering, I wound up ordering a SCSI2SD v5.1 adapter, and using this adapter I don't observe the problem. I'm guessing it's a compatibility issue between the Classic II and the SCSI2SD v6 adapter. I'm going to reach out to the designer other SCS2SD and file a bug report, but...

Could you give a bit more detail about what finally solved your issue? I'm having difficulty with my SCSI2SD adapter as well. Was it simply the new SD card that seems to have gotten things sorted for you?