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Adjusting R8 to Increase HP-97 Printer Intensity
02-17-2021, 03:07 PM
Post: #12
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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Messages In This Thread
Potentiometers - Dave Frederickson - 02-17-2021, 06:11 PM
RE: Adjusting R8 to Increase HP-97 Printer Intensity - James Linder - 02-17-2021 03:07 PM
RE: HP97,91,92 Print Intensity - teenix - 02-15-2021, 10:41 PM
RE: HP97,91,92 Print Intensity - isanchez - 02-16-2021, 11:28 AM



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