Re: Stuck Printer in HP-97 Message #2 Posted by Tony Duell on 16 Dec 2005, 2:22 p.m., in response to message #1 by Jorge
If the printhead is moving back and forth correctly, then the electronics, the motor, and the gear train on the side of the printer are most likely fine.
The paper advance is operated by the head carriage. The paper feed roller has an internal ratchet mechanism operated by a ridge on part of the roller assembly engaging with the head carriage. As the head moves back and forth, it rocks one part of the ratchet and thus advances the paper.
I would look in the service manual (on the MoHPC CD-ROM set), there's an exploded view of the printer there. I would then strip the printer down (it's not that hard, but then again I have done it a few times) and examine the parts. Most likely the problem is the actual rubber rollers, in which case roughening them up with very fine wet-n-dry paper helps.
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