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Thanks for your reply JDW. As it turns out, my issue with the eject mechanism wasn't related to capacitors. It was the NEC µPA2003C 16 pin NPN silicon epitaxial darlington transistor array, located just below the four diodes on the main controller board. I replaced this and now the eject...

I'm in the process of restoring a couple of 400K drives myself. Both have had their mechanisms cleaned and lubricated, and the disk load action is very smooth. However, one of them won't eject a disk, and the other won't spin up when you insert a disk (it knows the disk is in there, but the...

I have a DMM, and I don't think it's responsive enough to show any sort of flickering. I haven't been able to observe any real voltage fluctuation when it restarts.

So far I've only monitored 5V, but there's no noticeable change at all when it restarts. If it's dipping or spiking, it's happening so fast that I can't see it on the multimeter. I'll check +12 and -12 too.

Hi all, this is a duplicate of a post I published on a Mac group on Facebook, so my apologies if you're reading this for the second time. I was hoping to get some help from one of the tech gurus out there regarding a Mac Classic II analog board (820-0525-B 240V).  The board wasn't working, so...

I found it eventually. It was Super Studio Session. Thanks, Bruce

Hi all, I've been Googling this for the past 30 minutes without success, so I'm hoping someone might help me try and identify an old 68K Mac music application. I was only young when I used it, but the interface looked like a tape deck. You could open up song files and it would play them and...

Hi all, If I was to answer driven by emotion, I'd have to say the Mac Plus. Lots of fond memories of working with these. I just love opening them up and pulling them apart (which is evident in my YouTube vid from a few years ago). They were a pretty powerful computer in the day, and with the...

I have to say, I'm pretty ecstatic about picking this up for so cheap. I've been on the lookout for an original 128K or 512K Mac for some time. They don't come up that often here in Australia.

Thanks Elfen, that's excellent info. The board definitely looks like an original 512K... ...and the ROMs are dated 1985, so I guess that means ROM upgrade. Thanks again! Bruce

Hi all, I recently purchased an untested Mac 512K on eBay, and it arrived today. It was dead, but I replaced a fried resistor, and it's working now. To my surprise, when I placed an 800K, 6.0.5 system disk in it (just to see if the drive motors were working), it booted up! So I can only assume...

Thanks everyone, that's fantastic info. So I guess the next question is, what do I replace them with? Can someone recommend particular caps that will last better than the originals? I'm guessing this has been covered elsewhere in this forum in the past. Thanks again, brayne [edit] Sorry...

Hi all, I had my SE/30 open today to replace the PRAM battery, and to try and work out why it wasn't producing any sound (I was guessing that the speaker cable wasn't connected). Anyhow, I opened it up, and while carefully removing the motherboard (a job I have undertaken on many an occasion)...

Thanks everyone, this is just what I was after. Thanks Bunsen, this looks like a fantastic resource. Thanks basalgangster, I'll be looking into all of these. Thanks Scott, I was going to go down the ATM, Type 1 fonts path, but this looks much more logical. I have an external hard drive, so...

Hi everyone, I'm pretty new to this forum, and I just want to start by apologising if this topic has been covered elsewhere. I recently purchased a Mac Plus on eBay (4Mb RAM, 100Mb external HD), and I'm really enjoying having fun with it. It's been many years since I had one of these in my...

Can you ask someone to turn the Q700 upside-down? It won't stop the battery from leaking, but if it does leak, at least it would be leaking onto the plastic case, rather than the delicate components. Just a thought.

Someone had also knocked the glass tip off the end of the CRT, compromising the vacuum, so it was well beyond repair (for me anyway). I managed to salvage the Mac Classic memory upgrade board (fully loaded), the floppy drive and an original Apple 40Mb HD. There might still be some good...

Hi all, The other day I bought a non-working Mac Classic off eBay, and it arrived yesterday. All I wanted was the case, so I didn't mind that it wasn't working. I opened it up and found that the little 3.6v PRAM battery had corroded and had leaked acid all over the motherboard. When I pulled...

Hi all, I'm new to this forum, and have just started reading this thread and am fascinated by it. I would love to try this myself. Are these I-O DATA R-IDSC SCSI to IDE adapters readily available? Looking at their site, it looks like they are discontinued. Does anyone have any idea where one...