IBM 6400-I15 Maintenance Manual - Page 180
The display shows NOT READY., VICE / PRINTER MECHANISM TESTS.
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9. Press Enter. The printer begins printing all Hs, each line preceded by the phasing index number. 10. Press Return. The display will show "SERVICE / PRINTER MECHANISM TESTS". 11. Press Scroll" or Scroll" until "SERVICE / HAMMER PHASE VALUE" is on the display. 12. Press Enter. The top line of the display will show "HAMMER PHASE VALUE" and the bottom line will show the current phasing index number. 13. Press Enter. The phasing index (followed by an asterisk) will move up to the top line of the display. 14. Press Scroll" or Scroll" to increase or decrease the phasing index, then press Enter to activate the value as it prints. Continue to increase or decrease the phasing index until the pattern of Hs appears as shown below: Needs Adjustment Correct Needs Adjustment 15. When the print pattern is acceptable, press Stop. Printing stops, and the printer automatically enters the current phase index value into NVRAM. The display shows "NOT READY". 16. Press Scroll" + Scroll" to lock the Enter key. 17. Close the printer cover. Press Start to put the printer into READY mode. NOTE: If you changed the phasing value, power down the printer, remove the shuttle cover, and write the new phase value on the aluminum shuttle casting. 180 Adjustment Procedures
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