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cruff

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  1. Version 1.16 appears to be the latest. I don't know how much of a hassle it would be if you signed up for the "insider program" to access the downloads and release notes.
  2. Definitely remove the soldered on battery and replace it with one of those kits to mount it in a holder off-board.
  3. It is possible that a PATA HDD is starting to develop errors by this time, and that could explain the errors and corrupted file you saw. A low level reformat might correct the issue, but finding a utility to actually do the low level format might be difficult. Obviously you would have to start from scratch to reload the HDD after that. There is a possibility that bad capacitors are causing problems also, could be anywhere in the power supply, motherboard or on the disk itself. You'd need to verify that the power supply voltages are in range and do not have large amounts of ripple on them. An o
  4. You could just wait and try seating it further when the chip and socket had warmed up a bit. Don't over do it so as not to crack the chip carrier. Or you could just use it and if it acts up later then try to seat it further.
  5. On my 5.0a board, you physically remove the terminators. On a 5.1 or 6.0 board, you can do it via scsi2sd-util. On the 5.5 board, the web site says it is permanently enabled. http://www.codesrc.com/mediawiki/index.php/SCSI2SD#Technical_Specifications Note there is a comment for the 5.5 board: I don't recall if all Macs supplied the terminator power.
  6. Is the SCSI bus properly terminated when the SCSI2SD is attached?
  7. As to the resistors for a dummy load, you'll need to calculate the appropriate values and power ratings for the load you want to draw. For example, if you want to draw 1 A continuous from the 5 V supply, you will need a 5 ohm resistance that can withstand 5 W. If this was a continuous service, then you'd likely spec a 10 W resistor or provide proper heat sinking/cooling. For your test, where you won't be running it continuously, you could get by without cooling. You could also use 5 x 1 ohm resistors in series, and you could get by with 1 W resistors as each would have
  8. You can test it. Some switching power supplies require a minimum load for their regulation to work correctly. I don't know anything specific about a IIsi power supply, it's been probably 25+ years since I had a IIsi in my collection. Often for small computer power supplies, the +5V line needs some fraction of the amperage rating drawn, and the other voltages will be regulated as a byproduct. You can attach a suitable resistor across the +5V and GND lines to achieve this. The resistors might be some combination of power resistors to draw an amp or two, or possibly a automobile lamp. Since the I
  9. Fuse F101 appears to be missing, but there are end caps in the fuse holder?? Was there ever a capacitor installed at C116? It's not obvious from the picture if something was there previously. Maybe C302 is leaky?
  10. Possibly, especially if they are part of the print head pin driver power supply. Also it would be prudent to check the cable that leads to the print head for breaks or being disconnected. This manual might be useful if you don't already have a copy. https://mirrors.apple2.org.za/Apple II Documentation Project/Books/Sams ComputerFacts - Imagewriter II.pdf
  11. And the print head is properly located so that if the printing pins will actually contact the paper? While it is attempting to print, can you tell if the pins are even moving? Maybe there is an issue in the circuits that drive the solenoids that actuate the pins.
  12. If you can buy a sheet of the correct (or near correct) thickness, only cutting to width and height is necessary.
  13. Oops, but at least you know which one to reverse now.
  14. Maybe you can find a suitable closed cell foam sheet used to wrap items for shipment? That could be obtained in small quantities from a packing supply store or online (but maybe in larger amounts than you need).
  15. Sounds like a bad capacitors issue. Maybe start with the power supply then move to the motherboard.
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