OKIDATA ML590 Service Manual page 220

23 Paper Change
Lever Alarm
24 Cut Sheet Jam
25 Printhead
Thermal Alarm
26 Space Motor
Thermal Alarm
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Change lever is Set the lever to the specified
set for top feed position check the rear
while paper is sensor lever replace the
inserted from main control board
rear or bottom
Cut sheet could Remove the paper check the
not be fed feed mechanism Press SEL
properly
Printhead Wait until the printhead
temperature cools. The printer should
exceeds 115 resume printing. If the
degrees problem persists replace the
printhead replace the main
board
Temperature of Wait until the printhead
space motor cools. The printer should
exceeds resume printing. If the
specified value problem persists replace the
space motor then replace the
main control board