I have an almost New condition 9815a. The thing is spotless inside. It is as tough this thing was purchased and put aside and never used. Maybe because of
the printer problem. The print head is working fine but the paper is not advancing.
What is happening is that during the printing of a line, the printer solonoid energizes at the beginning of the line and releases at the end. It is not actuating on
each of the line feed pulses. I can feel the solonoid energize for each pulse but it is as though the energy stored in the coil is not being released between
pulses.
I think there may be some defect in the path that is used to release the energy. I don't have a schematic and will try to buz this out later this week but was wondering if the components are all on the main circuit board or if some might be embedded inside the colonoid coil.
OR, might there be another problem that I have not thought of. I know the ratchet mechanism works ok because I have tested it manually. The return spring
seems fine.
Thanks