Re: My IR-printer 82240A doesn´t print right Message #3 Posted by Tony Duell on 15 Aug 2011, 4:27 a.m., in response to message #1 by Matti Övermark
The printhead consists of a vertical column of elements (each corresponding to a dot row), and it appears that some of yours have failed.
I would open it up, disconnect the printhead ribbon from the PCB and check the elements for continuity. If some are open-circuit, you need a new print mechanism (I don't think the printhead is a replacable part, alas).
If the printhead checks out, it could be the driver chip on the PCB (I think that's a standard part and can be replaced) or the microcontroller (custom programmed, only source is another similar printer).
There's a schematic of the 82240B on the HPCC CD-ROM. There are differences, of course, but it might be a start.
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