Kevin Schoedel wrote: I have 2 6800D2's, the full manual and the power supplies. One has the keyboard interface the other does not (I had the keyboard around here somewhere. Nice to know that they are rare, but they're not for sale. :-) -- Linux Home Automation Neil Cherry ncherry(a)home.net http://members.home.net/ncherry (Text only) http://meltingpot.fortunecity.com/lightsey/52 (Graphics) http://linuxha.sourceforge.net/ (SourceForge)

I have recently aquired an Apple Lisa Widget drive in ? working condition. Upon examining it and the its schematics, it appears to have the same logical [parallel port] interface that the Profile drives have. I would like to try this drive in a Lisa 1(2), the only Lisa I have, but the Lisa 1(2) does not have the appropriate connectors for a Widget drive. I've never seem a Lisa XL in person, but my guess is that its "parallel" port, being internal, was brought off the motherboard in place of the "second floppy" connector, into a 26 pin female connector that attached to the Widget controller board. That's one connection (J1). The other connection is the power connector (J2), which provides +5,+12,-12, motor +12, motor Gnd, Power OK. This connector is also not present in the Lisa 1(2). I am assuming that these voltages and connector were just added to the wiring harness that connects the power-supply/ video/ motherboard/ softswitch/ floppy together. I don't understand what difference is there between the +12V (J2-2) and +12V Motor (J2-5) is. Can anyone verify these assumptions and questions? I think I can adapt the Lisa 1(2) to use the widget with a bit of wiring. The external parallel can be brought back inside and the Power connector wired up from the existing wiring harness. Of course, I won't make any changes that would not be easily reversable. I have schematics for the Lisa 1 motherboard, but have never seem one for the Lisa 2 motherboard. Having that would go a long way in answering my questions. Anybody have one scanned? Finally, I've read( from Larry Pina's book) that the 1.2amp power supply is barely adequate for the addition of the Widget. I am looking for an 1.8amp supply. Even a broken one that I would try to fix would be acceptable. Anyone got a spare, working or broken to sell? I also need a soft power switch assembly. Thanks, John jlewczyk(a)his.com

Upon the date 12:11 PM 8/5/00 -0500, Joe said something like: -- snip -- That's right Joe, on points you make above. The chiclet kbrd was a right pain. On our first 9825A that was purchased for use on a production machine, the 'Continue' key collapsed after quite a few operations. The operator hit that key at least once for linear encoder that was calibrated on that machine. Usually 100-200 encoders per day, five or six days per week, for about three years before that switch gave out. Typically, like our Tony Duell, I set to finding out if I could fix it. Also, production was shut down because of this so there was a second, more important reason ;-) I dismantled the keyboard to pieces and carefully setup the flat spring's curve and soldered the contact to at least temporarily fix it. Back into production. I promptly ordered a replacement keyboard from HP (for $350 as I recall) and received a kit containing a new upper front case section which has the fastening mounts for the display, tape drive and printer and of course the keyboard plus a nice Cherry keyboard. The badge on front said 9825B indicating the case section was simply pulled from the then-built B's inventory to make the retrofit kits. The operators were literally thrilled over the better keystroke action as they had to type serial numbers of the encoder under test plus occasionally other notes for each calibration run. I still have that repaired keyboard plus I eventually ended up with that old 9825"B", nee A. I also eventually got our second 9825T which we put on a second machine that myself and a couple of other engineers built plus all docs, peripherals, accessories, etc. :-) However, during a production day, that old "A" developed a shorted series-pass transistor in its switching PSU board which put ~+18 volts onto the +5 V supply bus. Well, you know what happened next. I recall very well the HP Service Manager down at the old Paramus, NJ Service Center grousing that this happened occasionally and that those %$@*)! designers did not put in a crowbar circuit or other protection to prevent smoking the whole machine. Over $2000 worth of replacement assemblies caused the machine to be junked by the company (no way was it worth it as we had just one calibration machine using a 9825, the other had been 'updated' to one of those new-fangled Zenith Z150 peecees and I could find used 9825T's at that time (~1991) for $1500-$1800). My car became the 'dumpster'. Regarding the comment by someone in this thread (at 8:08 AM, 3 Aug as shown above), what makes the replacement kybd so horrible? Could that have been an early version of a replacement before the Cherry's were used? Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/

Upon the date 03:07 PM 8/6/00 -0400, Kevin Schoedel said something like: There is, believe it or not, a "service manual" for the 9825. I had the company buy one back in the mid-80's. Heckuva poor excuse for a service manual, but at least it has the PSU board schematics in it. No other schems, just PSU. I wonder if this was because the PSU had proven to be a fairly unreliable module? I have basically zero spare time anymore it seems (I should be doing one of several rather important things right now instead of typing this, however I'm a bit loyal to the group), but probably the practical solution would be to build a simple crowbar circuit out of an SCR and a few passive components and hang it across the output of that pass transistor. I feel an appropriate time delay fuse should be put inline between the rectifier and pass transistor too. Reason for that is the PC board traces could be fried before the main fuse blows. I could excavate my library for the manual (well, it's _somewhere_ upstairs in that very full room :-), scan the circuit and squirt it out to somebody who's got time to perfect this. Tony? Interesting. You said this was an 'A' model? Maybe by the time I had to replace the repaired chicklet keyboard on our old A, Cherrys came into use. I do recall both the Paramus serv. manager and our local CE as exhibiting pleasure at the replacement being a Cherry as if it being Cherry was the tonic to end all ills. Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/

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