Help needed card-reader repair
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09-29-2021, 03:26 AM
Post: #7
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RE: Help needed card-reader repair
(09-28-2021 10:09 PM)albertofenini Wrote:(09-25-2021 08:24 AM)wbvreeuwijk Wrote: The card reader PCB also has gone bad, but I've reverse-engineered it and am awaiting delivery. If anyone has any use for these, please drop me a line as well. I designed one with space for a variable transitor so that it should work for both HP-65 and HP-67. I have yet to receive the boards, but the idea is to put new components on it and only get the sense amplifier from the original board, then measure the resistance of the variable resistor or fixed resistor and set the new variable resistor to this level. 35 | 45 | 55 | 65 | 10 | 19C | 21 | 25 | 29C | 34E Ir | 41C | 33E | 33C | 34C | 67 | 41CV | 41CX | 71B | 75B | 10C | 11C | 12C | 15C | 16C | 41CL | DM41X | DM16L |
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Messages In This Thread |
Help needed card-reader repair - wbvreeuwijk - 09-25-2021, 08:24 AM
RE: Help needed card-reader repair - GreyUser - 09-25-2021, 03:47 PM
RE: Help needed card-reader repair - wbvreeuwijk - 09-25-2021, 05:19 PM
RE: Help needed card-reader repair - teenix - 09-26-2021, 03:10 AM
RE: Help needed card-reader repair - albertofenini - 09-28-2021, 10:09 PM
RE: Help needed card-reader repair - wbvreeuwijk - 09-29-2021 03:26 AM
RE: Help needed card-reader repair - teenix - 09-28-2021, 10:43 PM
RE: Help needed card-reader repair - wbvreeuwijk - 10-02-2021, 05:28 AM
RE: Help needed card-reader repair - albertofenini - 11-14-2021, 10:16 PM
RE: Help needed card-reader repair - AndiGer - 11-15-2021, 05:31 PM
RE: Help needed card-reader repair - wbvreeuwijk - 11-26-2021, 12:39 PM
RE: Help needed card-reader repair - wbvreeuwijk - 11-25-2021, 07:46 PM
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