Hp 97 faint printer - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: Hp 97 faint printer (/thread-197273.html) |
Hp 97 faint printer - Fouad M. Kaadou - 09-22-2011 Hello HP Museum,
Thanks in advance,
Fouad
Re: Hp 97 faint printer - Fouad M. Kaadou - 09-22-2011 If you don't see the pictures here are the links:
Re: Hp 97 faint printer - Katie Wasserman - 09-22-2011 The two recommended fixes for this are: 1) Try new paper. You can buy it a most office supply stores or on-line. 2) There is a resistor (R8) on the 97 printer controller board that can be changed to control the print intensity. See page 2-4 of the service manual. From my experiments this doesn't have a huge effect, but some.
Edited: 22 Sept 2011, 11:08 a.m.
Re: Hp 97 faint printer - Fouad M. Kaadou - 09-22-2011 Hello Katie, I have tried different paper and have tried the same paper on my HP-41c printer and printing was excellent so I am pretty sure the paper is not the problem. I do not own the HP-97 service manual. Can you email me the necessary pages to do this resistor upgrade? Regards,
Fouad
Re: Hp 97 faint printer - Dan W - 09-22-2011 That really does look like the result of old paper to me. I would first try new paper. It could be a build up of some gunk on the print head I suppose. I have repaired a lot of HP-97 printers and they have all responded well to a good cleaning. I have never had to change the resistor. Take it apart, clean everything and rebuild it. The really good news is the paper appears to be advancing evenly, a common problem that is a bit more difficult to fix. Rebuilding the printer is intimidating at first but really isn't difficult. Get the technical manual from the museum DVD - it is an excellent investment and not expensive.
Side question: Is there any source of modern blue printing thermal paper?
Re: Hp 97 faint printer - Fouad M. Kaadou - 09-22-2011 Hello Dan,
I have tested the same paper on a HP-82143a thermal printer for the HP-41c and it works fine. Could it be that the 82143a printer has just better printing power than the HP-97 and works better on old paper? Thanks,
Fouad
Re: Hp 97 faint printer - Fouad M. Kaadou - 09-23-2011 Hello Dan, I have heard that staples sell thermal paper. How can I clean the print head? How do I get to it? Regards,
Fouad
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