IBM 6400 series Maintenance Manual page 180

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:
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
180
Needs
Adjustment
the shuttle cover, and write the new phase value on the aluminum
shuttle casting.
Correct Needs
Adjustment
Adjustment Procedures