Rap 02 No Spacing Operation - OKIDATA ML590 Service Manual

RAP 02 No Spacing Operation

START
The alarm LED blinks.
Is the carriage assembly binding or jammed?
No Make sure the carriage cable is properly connected to the space motor
assembly and CN7 on the main control board.
Go to A.
Yes
1. Remove the ribbon to verify that the ribbon is not jammed.
2. Remove the space motor assembly
3. Inspect the teeth on the space rack and the space motor gear.
4. Go to A.
A
Has the problem been resolved?
Yes End of procedure.
No Is the fuse F2 on the main control board open?
No
Yes
Has the problem been resolved?
Yes End of procedure.
No Go to B.
B
Verify that +40 volts is present on CN7 main control board
Handbook.
Has the problem been resolved?
Yes End of procedure.
Go to B.
Replace the main control board.
Service Guide ML590/ML591
Chapter 4 Failure & Repair Analysis
Refer to Appendix A of the Service
Page: 160