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cruff

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  1. The ImageWriter II that I received with my IIgs setup behaves that way at power up, it homes to the left side then moves to the center. I've not actually tried using it for printing yet, but if I have the right cables, I can give it a try Saturday. The self test for the carriage movement does work as described, hold the line feed button down as you power it up until the carriage starts moving back and forth. To stop, press the line feed button again or turn off the power.
  2. I wonder if S11, the home position sensor switch isn't working reliably, or if there is a problem with the print head cable. It appears from the schematic that S11 is a normally open switch, but it isn't explicitly notated that way. According to the Sams Computer Facts document on the ImageWriter II, it is located on the print head carriage assembly. There is a description of the self test mode and some troubleshooting information in it. When you power on does the print head move all the way to the left to find the home position? If you hold down the LF button while you power it on, the carria
  3. If there is room for more material at the location of a break, Bondic (UV curing) works very well at providing strength.
  4. You should look for possible shorted tantalum capacitors too, but usually they tend to explode when they short.
  5. While I don't have a keyboard of this type to try to help out, I wanted to give you kudos for your excellent macro photos! Well lit and nicely focused.
  6. This is a soft switches test failure, looks like address $C015, bit 1?
  7. Does the G5 support a sleep mode? It's been a while since I've booted mine up and I can't recall.
  8. 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.
  9. Definitely remove the soldered on battery and replace it with one of those kits to mount it in a holder off-board.
  10. 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
  11. 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.
  12. 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.
  13. Is the SCSI bus properly terminated when the SCSI2SD is attached?
  14. 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
  15. 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
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