IBM 6500-V20 Maintenance Manual - Page 123

Operator Panel Message 144 SHUTTLE FAN FAILURE SEE USERS MANUAL Display Messages Table 3. Message List Explanation Corrective Action Sensors cannot detect current in the hammer bank fan circuit. 1. Cycle power. If the message appears, press STOP. 2. Power off and unplug the printer. Remove the paper guide assembly or pedestal top cover. Verify that the connector is not installed backwards. 3. Disconnect connector P107 from the controller board. Test connector P107/HBF for shorts or opens. (Refer to the Main Wire Harness Test Tables in Chapter 3 and the Main Wire Harness Test Diagnostic in Chapter 2.) Replace components that fail test. 4. Make sure P107/HBF has a good connection at J107 on the controller board. 5. Inspect airways and vents for obstructions. 6. Check the shuttle for electrical shorts (page 252). 7. Plug in the printer and power it on. If the problem reappears, the controller board or microcode is suspect. Do the following: 8. Save the printer configuration values. (Refer to the User's Manual.) 9. Clear NVRAM (page 237). 10. Download and install the latest code from IBM First (page 231). 11. Power on the printer in download mode and load flash memory (page 238). a. If you encounter loading problems, go to the appropriate error code for resolution. b. If you encounter the failure or message that brought you to this procedure, replace the controller board (page 319). After replacing the controller board, DO NOT make the printer READY, but proceed immediately to the next step. 12. Download and install the latest code from IBM First (page 231). 13. Power on the printer in download mode and load flash memory (page 238). If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support. 123