IBM 6400-I15 Maintenance Manual - Page 121
Op-Panel keys won't work, Paper Feeds poorly, Check the platen gap.
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Operator panel keys do not work 1. Power on the printer. Check the operation of the control panel keys. Replace the control panel assembly. 2. Power on the printer. Check the operation of the control panel keys. Replace the control panel cable assembly. 3. Power on the printer. Check the operation of the control panel keys. Replace the CMX controller board. Paper feeds poorly 1. Check the forms thickness lever: if it is set too tightly paper feeding can be affected. Set the forms thickness lever to match the thickness of the paper being used. 2. Power off the printer. Remove paper. Inspect the paper feed path for obstructions that could snag paper. Clear paper feed path of any obstructions. 3. Inspect the tractors and tractor door springs for damage or excessive wear. If either tractor is damaged or excessively worn, replace both tractor assemblies. 4. Check the paper feed motor pulley for looseness. Hold the collar snug against the motor pulley and torque the 7/64 inch setscrew to 25 ± 2 inch-pounds (2.82 ± 0.23 NSm). 5. Check the condition and tension of the paper feed timing belt. Adjust the paper feed timing belt. Replace the belt if it is damaged. 6. Check the platen gap. Adjust the platen gap. 7. Remove the paper guide assembly or pedestal top cover. Make sure connector P107/PAPR M is fully seated in connector J107 on the CMX controller board. Connect P107/PAPR M to J107 on the CMX controller board. 8. Power on the printer. Load paper. Press Form Feed and View several times and check that paper moves in both directions. Troubleshooting 121
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