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HP-19c almost works
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11-30-2021, 06:16 PM
Post: #12
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RE: HP-19c almost works
This battery idea worked perfectly for me. In addition, I changed the big 15 ohm current limiting resistor to 68 ohms, to allow safer charging for the NiMH batteries. Now I can charge from the AC adapter or the external USB charger.
Any luck with your problem? I routinely change out the tanatlum capacitors in any Classic or Woodstock series. This usually corrects power supply problems, and often the removed capacitors test good. Even if there's no visible corrosion, I still clean the holes that connect to the gold pins, and remove and clean the wire grid that connects to the keyboard. BTW - where did you find the schematic for the 19C? Again, thanks for this great battery idea! Regards, Dave |
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| Messages In This Thread |
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HP-19c almost works - Jonas Sandstedt - 11-17-2021, 08:26 AM
RE: HP-19c almost works - teenix - 11-17-2021, 08:52 AM
RE: HP-19c almost works - Jonas Sandstedt - 11-17-2021, 10:25 AM
RE: HP-19c almost works - teenix - 11-17-2021, 11:20 AM
RE: HP-19c almost works - Jonas Sandstedt - 11-17-2021, 12:58 PM
RE: HP-19c almost works - Jonas Sandstedt - 11-26-2021, 08:01 AM
RE: HP-19c almost works - teenix - 11-26-2021, 08:34 AM
RE: HP-19c almost works - Jonas Sandstedt - 11-26-2021, 08:39 AM
RE: HP-19c almost works - Jonas Sandstedt - 11-26-2021, 10:23 AM
RE: HP-19c almost works - Dreato - 11-27-2021, 03:52 AM
RE: HP-19c almost works - Jonas Sandstedt - 11-27-2021, 03:46 PM
RE: HP-19c almost works - Dreato - 11-30-2021 06:16 PM
RE: HP-19c almost works - Jonas Sandstedt - 11-30-2021, 06:37 PM
RE: HP-19c almost works - teenix - 11-30-2021, 10:32 PM
RE: HP-19c almost works - Jonas Sandstedt - 12-01-2021, 01:12 PM
RE: HP-19c almost works - Dreato - 12-01-2021, 03:35 PM
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