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S ECTION
CO NDIT I O N
4.1
NOT READY
AND/OR
NO INDEX
4.2
WILL NOT SEE K
OR RESTORE
POSSIBLE CAUSE
Diskette not inserted.
Diskette not clamped.
Unit not selected.
Drive motor not turning
Index sensor not
connected.
Index sensor defective.
Int e r f a c e not enabled.
Step motor disconnected.
Defective step logic.
Defective stepper motor .
Wrong option selected.
4-2
RECO M M EN D E D A CTION
Insert diskette.
Turn knob lock lever
clockwise so that it
is perpendicular to
the diskette insertion slot.
Verify unit select and
jumper configuration.
Verify interface drive motor on.
Check Connector P6.
Verify drive belt installed
Replace circuit board.
Replace Drive Motor Assembly.
Check P1.
Replace index sensor.
Verify interface direction,
step, and select signals.
Check Connectors P4 and P5.
Replace circuit board.
Re p l a c e Stepper Motor Assembly.
Check options DS and HL for the
particular application.
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