Recent content by feltel

The dead analog board went upwards in my "to be fixed" pile of stuff. I changed C3,C24,C27, C28,C30, C31 and C32 to new caps. The 2200uf ones only test about 1800uf in my components tester. After replacing them the AB does not flup flup anymore. But it also does not power up the screen. No high...

I once replaced a blown Q4 on an SuperDrive with diodes I got from AliExpress. The drive works to this day. https://68kmla.org/bb/index.php?threads/blown-component-on-sony-mp-f75w.44807/#post-515317

I got myself another Mac Plus and an additional logic board for a decent price. The machine is in good condition but does not work. The AB has battery damage inside the battery compartment and for whatever reason on the Optocoupler IC. I reflowed (nearly) every joint and tried powering it on...

Yes, such a black box was also inside the machine.

Update: I found this in the Internet Archive: https://web.archive.org/web/20100615035229/http://myoldmac.net/SELL/Apple-Card-GSP-Tablet-Interface.htm So this card isn´t an serial card as I thought. It´s an interface card for a graphics tablet. Case closed.

Thanks. I found this thread while searching. Unfortunately the user with such a card was last online 15 years ago and the Internet Archive did not catch the picture URL he posted. :-(

In my recently purchased Apple IIe there was an serial card but which lacks two ICs. Unfortunately I was not able to identify the card and subsequently I could not check which ICs where originally installed on this card. Does anyone recognize this card? I searched the internet but to no avail.

No harm done other that the arm was modified. But this arm was broken as I got it. If sometime in the future 3D parts for this appear the drive can drive can be repaired with it.

Yes its an stock 400k drive.

Success. It took me several days to build up a sufficient structure onto the arm. Now an inserted disk touches it and pressing it down into the light barrier which in itself activates the motor to turn the disc. Mission completed. :)

Yes there seems to be missing something on my drive. I watched @JDW s video on recapping those drives and on you can see how it is supposed to look. I took apart the drive and try to build up structure on the part that slides betweeen the photo sensor. I´ll put drops of epoxy over the next fews...

No, my does also have a photo diode which gets blocked when the plastic thingy (see https://68kmla.org/bb/index.php?threads/400k-floppy-drive-looking-for-3d-printer-file.48527/) is being pressed down by the floppy disk.

My 512k is slowly taking shape. I previously repaired its 400k drive and make it insert and eject disks properly. I removed the dried grease and reapplied new one. Also as my drive lost its upper head pressure pad I made a new one from a paper based cotton bud. Now that I have a working machine...

I did it. Those tabs are in fact controlling both directions. 😀

I know those two tabs but in my experience those only control the horizontal position of the picture.