IBM 6500-V1P Maintenance Manual - Page 209

General Symptom List Symptom Table 5. General Symptom List Corrective Action Ribbon Folding or feed problems with a 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. 209