Search results

I would love to do some small contributions. Do you have a template on what info you'd all like? So you can just copy paste most of it.

Please report back if you try. I'm curious how common this is. :) Also, a tip for allining the heads. Make a scratch running trough the motor housing and the fdd housing before dissasrmbly. So you have a starting point for the alignment.

Hi, welcome to the forum. I don't know if the pinout is in there but have you checked in the technical reference manual? http://www.bitsavers.org/pdf/zenith/turbosPort/TM-3034_TurbosPort_386_Technical_Reference_1988.pdf

Ok, awesome FDD drive fixed, If any other Ericsson PPC users have problems with unrelieble OKI Floppy drives maybe this can help, here's how I fixed mine: https://forum.vcfed.org/index.php?threads/kaypro-2x-boot-problem-oki-drives.1245450/post-1387976

I'm having the exact same issue with a very similar OKI drive GM-3305bu from an Ericsson Portable PC, the drive has issues returning the head sometimes and it refuses to find the first track. but after that it seems to work fine sometimes. I think I have found the issue with all of these drives...

awesome, good job. I've wondered if those unpopulated chips would allow for an easy upgrade but never tried, I guess I'll have to upgrade one of my T1200 's now :) for refrence this is what the 1MB LIM/EMS Toshiba upgrade card looks like. This is not my card, Big thanks to Michael from Germany...

thaks, I'll use that one. but first I have to go trough the FDD drive, it seems to have some issues and only boots 1/4 times or so with lots of errors.

Great, I've hadn't had a chance to tinker with mine but now I will, Thanks, interesting, this if diffrent from the Ericsson DOS 2.11D image that is already online (I suspect that one is from another system) I couldn't find the original disk anywhere, could you maybe also take a picture or scan...

I have actually made a purchase from him about 2 years ago. At that time his prices were a bit lower, but still way to high. I was looking at a sytem he had up for a couple of month already, so that seemed long enough for a very low offer of less than 1/4th the listing price. and to my surprise...

Sorry for the delay, Don't worry, no offence taken. Just wanted to make sure nobody tries to replicate this and risks the chanse of starting a fire when leaving it charging overnight. I think what I would do, (to be clear I am definitely not an expert in any of this) Is to add a diode coming...

Well if you could try and read out the IC that would be great. :) I'll have to check. It has been disassembled in a box for a year or so until I could take the time to do some more repairs. But I'll check if I can beep out the connections.

Still not safe at all IMHO, the voltage drops to the voltage of the battery pack but the T1200 PSU is still trying to charge the battery up to 11.7v, it is still pumping current into the pack. Now depending on what BMS you are using it might cut off the charge at around 4.3v as a safety measure...

I have been doing some research on the battery replacement. Mainly because it is a fun project and because it would be really cool to have one of the T1200 unique features up and running, that is it was the first portable computer to have a "sleep" function. It could be unplugged from the wall...

Don't rally have one to to open now. but I will try and see if I can revive one of those 20MB drives now that I know there is more on the inside. I've done many repairs on 20 and 40MB Connor IDE drives so I have some experience with what not to do. like, don't blow them out with compressed air...

you should take a ook at this thread, we were just discussing these hard drives. it might be worth trying to repair it. Absolutely no guarantee that will work with this 20mb drive but it's certainly worth a try if it's dead anyway...

Very interesting I haven't disassembled any of these to that point. I wonder if this is the same on both the 10mb and 20mb models My success rate for recapping (outside) and unsticking/lubricating spindle are: 10MB: 9/10 working reliably, last one doesn't spin up all the time, still has a...

strange, I haven't seen that yet. please post back when you have tested with another drive :) That's totally normal, the T1200 wasn't originally developed for a backlight, it only was available without one at the start, and then later they offered the backlight as an option or upgrade. at the...

that's strange first time i've seen one that doesn't spin up at all. have you tried "starting" it when the T1200 tries accessing it, when the drive indicator led is lid. maybe a stupid questing but have you checked that the HDD switch on the PSU is on? If the drive access led comes on and the...

Of course. :) The spindle is on the bottom of the drive. Use needle pliers to turn the inner nut clockwise (be careful not to damage the grounding tab). Don't have to turn it a lot, just break it free and then power it up. Best to keep it running for a while to make sure it doesn't get stuck...

No problem, just let me know when you retire it, or want to trade for something else :) The MCU is a PLCC 8742AH. so a bit annoying to desolder. It has the ability to enable a security bit, no idea if they locked it.