IBM 6500-V20 Maintenance Manual - Page 206

Symptom TOF is lost repeatedly General Symptom List Table 5. General Symptom List Corrective Action 1. Check that the customer is setting the forms length to match the size paper used. Set the forms length to match the length of paper being used. 2. If the customer is using multi-part forms, check that the forms thickness lever is not being set too tightly. Set the forms thickness lever to match the thickness of paper and provide satisfactory print quality, but not too tightly. 3. Check for heavily tented horizontal perforations in the paper. If horizontal perforations are heavily tented, consider setting the "Set Platen at BOF" configuration option (in the Printer Control menu) to Open. (Refer to the User's Manual.) 4. Check and adjust the paper feed timing belt. Replace the belt if it is damaged. 5. Check the dynamic paper tension. 6. If the platen gap is correct, remove the shuttle frame assembly (page 362) and check the following: a. Inspect the hammer bank cover assembly for ribbon debris, paper debris, or other foreign matter. Make sure the four foam spacers on the ribbon mask are properly seated. If the ribbon mask or hammer bank cover is damaged or deformed, replace it. b. Inspect the paper ironer for distortion or misalignment. Reposition or replace it if necessary. c. Make sure the paper guides are properly seated on the splined and support shafts and that their lower ends are seated in the groove on the upper forward edge of the platen. d. Make sure the paper entrance guide pivots freely with minimal down force. Reposition the springs or the guide if necessary. e. Check for correct position and function of the paper motion detector assembly. Reposition or replace if necessary. f. Inspect the paper path from above (below the paper ironer), and from below (above the paper entrance guide), for debris, foreign matter, or anything that could inhibit paper motion. Correct as necessary. 7. Remove the paper guide assembly or pedestal top cover. Make sure connector P107/PAPR M is fully seated in connector J107 on the controller board. Connect P107/PAPR M to J107 on the controller board. For v20 models, check connector J103 on the controller board. 8. Power on the printer. Load paper and set TOF. Press FORM FEED and VIEW several times and check that paper returns to TOF. Replace the paper feed motor if paper does not return to TOF. 206