Oki Microline 520 Service Handbook page 217

4.4.03 START HERE Flowchart
START
Power ON the unit.
Does the printer initialize?
No Is the ALARM Lamp Blinking?
No Refer to RAP 01.
Yes Refer to Section 4.6 of the Service Handbook.
Yes Load the printer with paper.
Does the paper load without jamming?
No Refer to RAP 04.
Yes Perform the Rolling ASCII test. Refer to Section 3 of the Service Handbook.
Is the output satisfactory?
No Refer to RAP 06.
Yes Are all operator panel switches operating properly?
No Refer to RAP 09.
Yes Has the problem been resolved?
Yes
No
Yes
No
Microline 520/521 Service Handbook
P/N 59257803
End of procedure.
Does the parallel or serial interface port receive data from the host PC
properly?
End of procedure.
Which port is not receiving data?
Parallel Refer to RAP 10.
Serial Refer to RAP 11.
4 - 9 Failure Analysis