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Hi, i have not worked on one of these for a long time, i have been looking and seeking through the forum but would like to have some experts here. I have collected a nice 6400 and except for the missing HD (not a big deal), the unit is complete and has already some nice upgrades (128 Mb of Ram...

I have bought a cheap complete setup, but the logic Board was bombed. The PSU was not doing much, even with new caps. So removed components to clean below and put everything back. Still nothing. Then removed and replaced the TL431, and this time the PSU worked. Second time i fix one of...

Hi, can’t find how many Apple IIe were made in total, one source says an average figure of 800 000 units. But the IIe was made from 1983 to 1993, and the Plus is close to 400 000 units (in 4 years only) so probably the IIe should have higher numbers. Anyone knows ?

i was thinking using two binaries in a 27C512 eprom and swapping from one or another for a Standard Rom or the newer 4X. Anyone has done that already ? I think using a switch on pin 27 (A 14) to get it working (probably even using the standard logic board bridges to do so)

Hi, looking for any advise from a CRT guru. I have collected a nice little monitor, replaced a lot of capacitors (no obvious fault) as the monitor has a wobbly (from left to right) image (the image is also rolling up and down) I am thinking that it is an issue with vertical deflection, but no...

Last week, I collected an Apple Il monitor for a fair price (was advised for parts or repair and untested, but in good condition) After cleaning the casing (which was great) I tested it only to discover that it was suffering from a complete vertical collapse. remember the untested notification...

I have found a cheap SE/30, cleaned the board, new caps around. The board got a chime but I have no vertical sync. I have just a bright line in the middle of the screen. The analog board is not the issue, tested ok. Logic board is the problem. So far, I have tested the continuity from the...

Hi, have a strange issue in one Plus. Working ok, booting from HD or floppy but displaying the message « disk not readable - erase or eject » The message is coming again and again, whatever the erase or eject button is selected. The floppy is not the issue, tested and working fine in...

Looking information or schematics for a Cube PSU. I have a shorted component but the only information that is present is the D3 label on it. Any clue ?

At some point i ordered several units of that device. https://tulip-house.ddo.jp/digital/SDISK2/english.html Out of the two units i have, one is working fine, while the other is not. There is not much about it, a single 74LS chip and the Atmega 328. If i take the Atmega from the good unit...

Made myself a new tool for the 128/512 and Plus. Can now test a drive with the logic board not hanging on one side.

I have at home a bombed SE with checkerboard. A pair of traces have been repaired, but still having the issue. Are the Bourne filters required in the boot process ? apparently i have no reset and filters are close to the battery and also close to the reste switch.

How many of you will buy an expensive computer several decades ago without even bothering using it ? A friend of mine was looking for an Apple II and i found him the perfect one… a brand new Apple IIe never ever touched. Everything is mint, no corroded connectors, no dust. The warning tape...

I have a strange issue with a 800k drive, the ejecting motor is spinning all the time. tried with several motors, the plastic gear is new. So the issue is on the board, somewhere... the connector is receiving 2 x 12 volts and 1 x ground and the switch is working ok. Any clue ??

I am a fan of the Columbo show, and a Newton game was issued at some point. http://www.columbo-site.freeuk.com/pcgame.htm Don’t know if the card was rare or not though.

Anyone knows what that transformer specs are ? Found in an Apple II monitor Mine seems faulty. My guess around is 22 volts, by don’t know if AC or DC (probably AC)

Hi, i have found a Liron card and also the Unidisk 3,5 to go with it. How can i format and make a bootable disk now… so what is the more suitable way to do it.

Another post related to clones. What is the way to read 2316 Roms ? using a 2716 instead of a 2316 is easy to find, but the other way round is misleading. I will like to read my clone Roms for safety purposes.

Apple II clones are fetching more money than some original units... is this an ebay thing or some are pretty thin on the ground hence the expensive price ?

Anyone has been troubleshooting or found a solution for globally good drives but bad heads ? Have at least 3 good drives, but the fault is related to bad heads