Apple II

Apple ][ Plus, Keyboard works (now) except Shift?

Submitted by DistantStar001 on November 18, 2021 - 1:41pm

Recently, I got an Apple ][ Plus in externally decent condition, but internally not so great (lots of dirt and debris, some corrosion on the motherboard).  I've replaced the motherboard (tested to work, and boots).  The old motherboard has no video signal whatsoever, no beep (did beep for a bit, but then stopped).  Unfortunately, the Keyboard had been plugged into it backward (something that I didn't realize until I tried using it as a guide on the new motherboard).  The new board still boots.  But most of the keys didn't work (mostly the letters).  

 

Forums: 
Apple II

DUODISK Calibration and Adjustment

Submitted by GianDO on November 18, 2021 - 12:10pm

Hi everyone,

I have a Apple IIe. I'd like to know if it is possibile find a specific diagnostic software for the step motor calibration and adjustment of the heads alignment of DUODISK drive ..

 

Thank you

 

GianDO

 

 

 

Forums: 
Apple II

Schematic for DynaComp Apple 2e power supply 606-5001?

Submitted by oldappleguy on November 13, 2021 - 11:27am

I fully recapped the power supply in my 1985 Apple 2e.  It is a DynaComp 606-5001.  It no longer works, I believe the problem is with the -5V or -12V side.  It clicks as if it is shorted.  +5V and +12V work fine. 

I am troubleshooting it, but could really use  a schematic diagram.  Does anyone have one?

All I have been able to find is a cap list and placment diagram  link

 

Thanks for any help,

 

dave

Forums: 
Apple II

FTP Asimov down?

Submitted by Keatah on November 11, 2021 - 9:08pm

FTP Asimov is down. Everytime it goes offline I think it's the end. But this time it's asking for a login..?

Forums: 
Apple II

Unidrive 3.5 issue

Submitted by nick3092 on November 11, 2021 - 12:28pm

I recently picked up a unidrive 3.5 of unknown working condition to use with my ROM4 //c. Unfortunately, seems like the condition is not working. When I put a disk in, it makes a sound like it's trying to line up the peg with the hole on the disk hub. Then when I boot it on my IIgs (the //c is currently boxed up), I hear a motor inside spin on-off-on-off-on-off and then the IIgs just gives me the sliding Apple error screen. I should note that I disassembled it before doing anything and cleaned the heads carefully with a qtip and 99% IPA. 

 

Forums: 
Apple II

Laser 128 - Composite Out color shift/ghosting

Submitted by gieskj01 on November 10, 2021 - 10:43pm

Hello fellow Apple II/Laser128 fans,

Forums: 
Apple II

Apple II Gameport EPROM Programmer

Submitted by tolderlund on November 8, 2021 - 2:23pm

I saw this page which has a description for an eprom programmer:

https://www.applefritter.com/appleii-box/H049_AppleIIepromProgrammer.htm

Is there a ready made layout file I can use to order a PCB?

And is there a proper BOM list somewhere, which makes it easier to order the correct components?

 

 

Forums: 
Apple II

Removing IIGS shield for retrobriting

Submitted by EmpireStateHuman on November 8, 2021 - 9:55am

I have a heavily yellowed IIGS which I'd like to retrobrite, but am worried that the hydrogen peroxide will cause the shield to rust.

 

Given that the shield is effectively welded to the case, is there any good way to remove it and put it back? Thanks!

Forums: 
Apple II

Lobo 5.25" Drive info?

Submitted by desertrout on November 6, 2021 - 10:43pm

Does anyone have any experience with the Lobo 5.25" drives for Apple II's? I have one here that is non-functioning --- in fact, plugging it in to the Disk II controller prevents the system from booting at all. I'm quite certain the cable is connected at both ends properly. I'm having a lot of difficulty finding any information about these drives at all... and I also can't seem to find any information on why plugging a drive in would prevent a system from booting. Any thoughts?

 

 

 

 

Forums: 
Apple II

Franklin Ace-1000 Beeps (sometimes) with a Garbage Screen

Submitted by DistantStar001 on November 6, 2021 - 3:57am

Just picked up a Franklin ACE 1000 and I have an issue.  The computer powers with a screen full of garbage (various random characters, many inverted, with a few random solid and checkered blocks mixed in), and will beep on power-up most of the time (every so often it's silent).  Usually hitting reset will cause it to beep, and typically change the garbage on screen (fewer characters, or more spaces, lots of exclamation points).  

 

Forums: 
Apple II

Pages

Subscribe to Apple II