IBM 6400-I15 Maintenance Manual - Page 91
Platen Open Timeout, Close Platen
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If the message appears, replace the power supply board. 5. Power on the printer. If the message appears, replace the shuttle frame assembly. 087 PLATEN OPEN TIMEOUT CLOSE PLATEN 1. On a coax interface, the forms thickness lever has been open for at least one minute. Load paper. Close the forms thickness lever. Press Stop. 2. Run a print test. If a platen open or close platen message appears, power off the printer. Remove the paper guide assembly or pedestal top cover. Disconnect connector P107 from the CMX controller board. Check continuity of the platen interlock switch cable from P107 to the switch. Replace the platen interlock switch assembly if it fails continuity test. (Refer to Appendix A, Switch Assembly, Platen Interlock.) 3. Check that the platen interlock switch is not loose. Tighten the screws securing the platen interlock switch 4. Check the condition and tension of the platen open belt. Adjust the platen open belt. Replace the belt if it is damaged. 5. Check the platen open pulley and the platen pulley for looseness. Bottom out the platen open motor pulley on the motor shaft and torque the 1/16 inch set screw to 9 ± 2 inch-pounds (1.02 ± 0.23 NSm). Tighten the 7/64 inch setscrew in the platen shaft pulley, then open and close the forms thickness lever and check that the platen pulley setscrew does not hit the left ribbon guide. 6. Disconnect connector P106 from the CMX controller board. Check the resistance of connector P106/PLAT M. (Refer to the Main Wire Harness Test Tables on page 297.) Replace the platen open motor if it fails the resistance test. 7. Run a print test. If a platen open or close platen message appears, replace the CMX controller board. Record the message and return it with the defective board. Troubleshooting 91
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