Rap 03: Head Homing Error - OKIDATA Pacemark 3410 Service Handbook

RAP 03: Head Homing Error

START.
Is +38vdc present on the main logic board? Check at both ends of Capacitor C4.
NO Check for an open fuse on the main logic board.
Are the cables from CN3 and CN7 on the main logic board correctly connected to the
power supply unit?
YES Replace the power supply unit.
NO Connect them correctly.
Is the problem resolved?
YES End of procedure.
NO Go to the next step listed below.
YES Make sure that connector CN1 on the main logic board is correctly installed.
Is the problem resolved?
YES End of procedure.
NO Power OFF the printer and manually move the carriage.
Does it move smoothly?
YES Replace the main logic board.
Is the problem resolved?
YES
NO
Is the problem resolved?
YES
NO
NO Is there any paper scrap or dirt on the spacing mechanism?
YES
NO
Failure Analysis
End of procedure.
Replace the space motor.
End of procedure.
Contact Technical Support.
Remove the obstruction.
Remove the ribbon cartridge.
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