General Category > LisaList2

IBM 3852 / Canon PJ-1080A

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stepleton:
This sounds awfully similar to the situation I had with the M line in my PJ1080A last week. That blotting procedure I described did the job for me, but it could be that your problem lies elsewhere in the plumbing.

blusnowkitty:
Well, it works! K is still a little iffy but it is printing again, and it's printing pretty well for being 40 years old! The VCF thread says that the 3852 ESC codes still correspond to the 1080A's, so tomorrow I'll get off to the electronics shop and see if I can build a Lisa to PC adapter cable.

compu_85:
That looks really good! The IBM font looks a bit nicer than the Canon one.

You might want to replace the foam "bumpers" on the edges of the mechanism. I used self-stick window gasket for mine. On the Canon the printer recalibrates often by moving the head left as far as it will go.

-J

blusnowkitty:

--- Quote from: compu_85 on September 07, 2021, 08:14:25 am ---You might want to replace the foam "bumpers" on the edges of the mechanism. I used self-stick window gasket for mine. On the Canon the printer recalibrates often by moving the head left as far as it will go.

--- End quote ---

So does the 3852 I believe.

So I built myself a DMP cable according to the pinout above, and no dice. I'm seeing the same failure method that Tom did back in LisaList1 where the Lisa takes several minutes to error out on printing. Verified that everything is where it should be with a multimeter and nothing. I may try moving 16->10 to 16->11 and see if that does anything - can't imagine it would given the results in LisaList1, though...

ETA: Switched the pins. With the pins switched, the Lisa instantly says that the printer is not connected.

blusnowkitty:
Does anyone here have an original DMP cable and would they be able to verify the pinout? I'm now curious if the schematic on Apple's website is correct - building the cable according to the document seems to have an error where it says Pin 21 on the Lisa should go to Pin 13 on the Centronics. However Pin 13 on a Centronics is SELECT, where Pin 31 is the RESET line. This seems to be backed up by Tom's work in the LisaList1 thread saying Lisa Pin 21 should go to PC Pin 16 which is indeed the RESET line on a PC-style cable. Once I moved RESET from 13 to 31 I started seeing the printer resetting on power-up. However I'm still not getting any output from the printer even after moving BUSY from 11 back to 10 (ACK) on the Centronics.

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