ard at p850ug1.demon.co.uk
Tue Jan 24 16:21:50 CST 2006
> Hi there,
> I've finally got the ribbons for my LA36, unjammed the pins in the
> printhead and it is printing. It's not quite right yet, though...
> The printhead often jitters backwards and forwards, sometimes several
> inches. When you hit "RETURN" it's obviously lost track of where the
> head is, and slams it into the left-hand stop, where it sits obstinately
> pressed against the spring.
> Cleaning up the photosensor bit on the interrupter wheel seemed to help
> a little.
I thinkl you're in the right area. I would grab the prints and look at
that circuitry, stick a 'scope on the outputs of the phototransistor
Oh, and do check the power lines for mains ripple!
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