Adjusting R8 to Increase HP-97 Printer Intensity
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02-17-2021, 03:07 PM
Post: #12
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RE: Adjusting R8 to Increase HP-97 Printer Intensity
Thank you gentlemen for your input.
I did try different paper rolls that had never been used and it does make a huge difference. The R8 resistor on the PCB of a spare printer module I have is 196,000 ohms so it is the most resistance that Hp installed in the 97. I ordered 20K and 50K potentiometers to install in series and will probably go with the larger one since it will permit me to increase resistance a maximum of 25% which is as High as I dare go for fear of burning up the print head. Once the parts arrive I will post the results here! |
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