Re: Printing quality on HP-97 Message #5 Posted by Christophe Dubreuil on 31 Jan 2011, 3:14 a.m., in response to message #4 by Katie Wasserman
I finally went thru the service manual ... i checked the various things i could (resistances and voltages) and all seems OK , i guess it may be one of the transistors that is weak (explaining meybe the light line).
I should get an oscilloscope ro further investigate.
But as i pointed out ... it happened after i opened it for fixing the magnetic card reader ... it was perfectly working before ...i should have inadvertably modified something.
I am a bit reluctant to change R8 and modify it. I guess i will use it as it is, and if it get worst i then will proceed further.
Thanks to the community.
Christophe Dubreuil
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