OKIDATA Pacemark 3410 Service Handbook page 227

A
YES Is the interface cable connected correctly?
NO Connect it correctly.
YES Are the + 8 vdc output voltages supplied by the main logic board?
Check at pin 6 of connector CN7.
NO Are the cables to CN3 and CN7 on the main logic board properly connected
to the power supply unit?
NO
YES
YES Replace the printhead.
Is the problem resolved?
YES
NO
Is the problem resolved?
Baud Rate
Character Format
Protocol
BUSY Signal output selection
Pacemark 3410 Service Handbook
Connect them correctly.
Replace the Power Supply Unit.
End of procedure.
Replace the Program and Slave ROMs.
YES End of procedure.
NO Are the cables connected to CN2 and CN6 on the main logic board
damaged?
YES Replace the cables.
NO Check the following MENU Settings related to the interface:
4 - 29 Failure Analysis