General Symptom List
109
Ribbon
Ribbon folding or feed
problems
1. Check that both ribbon spools are fully seated on the
ribbon hubs and the ribbon runs between the ribbon mask
and hammer bank cover. Install the ribbon correctly.
2. Check that the ribbon spools are not rubbing against the
shuttle cover assembly. Install the shuttle cover assembly
correctly, so that the ribbon spools do not rub against it.
3. Inspect the paper print path for paper chaff, ink residue,
and debris. Clean the shuttle frame assembly.
4. Power on the printer. Run a print test and observe ribbon
movement across the left and right ribbon guides. Adjust
the right and left ribbon guides.
5. Observe ribbon movement at both left and right ribbon
posts as the metal end strip crosses each ribbon post. If
the metal strip moves past either post without reversing
the direction of the ribbon, power down the printer.
Remove the paper path or pedestal top cover. Reseat
connectors P106/LRP and P107/RRP on the controller
board.
6. While shorting across each ribbon post with the ribbon
metal strip or a screwdriver, check for continuity in
connector P106/LRP pins 10 and 12, and connector P107/
RRP pins 14 and 16. (Refer to the Main Wire Harness Test
Tables in Appendix A.) Replace a ribbon post that fails the
continuity test.
7. Check the platen gap. Adjust the platen gap.
Table 3. General Symptom List
Symptom Solution
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