IBM Infoprint 6500-v05 Maintenance Manual page 209

Symptom
Folding or feed problems with a ribbon
Table 5. General Symptom List
Ribbon
1. Check that both ribbon spools are fully seated on the ribbon hubs.
2. Check that the ribbon runs between the ribbon mask and hammer bank cover. Check that the
hammer bank cover is Installed correctly.
3. Check that the ribbon spools are not rubbing against the shuttle cover assembly. Install the shuttle
cover assembly correctly, so that the spools do not rub against it.
4.
5. Inspect the paper print path for paper chaff, ink residue, and debris. Clean the shuttle frame
assembly.
6. Clean the ribbon guides.
7. 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 if necessary.
8. 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 media,
power down the printer. Remove the paper guide assembly or pedestal top cover. Reseat
connectors P106/LRP and P107/RRP on the controller board.
9. 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.
Replace a ribbon post that fails the continuity test.
10. Check and adjust the platen gap.
Corrective Action
General Symptom List
209