Rap 07:Serial Interface Does Not Receive Data - OKIDATA ML320 Service Manual

RAP 07:Serial Interface Does Not Receive Data

NOTE:
Before performing the procedures of this RAP, make sure that the correct protocols are
selected. Print the Menu to check protocol settings. For information on printing the Menu,
refer to Section 4.10
START
Is the serial interface cable correctly connected to both the serial interface board and the
host computer?
NO Correctly connect the cable.
Is the problem resolved?
YES
NO
YES Replace the serial interface cable with a cable proven to work. Is the problem
resolved?
YES
NO
Do the memory buffer and interface tests pass?
of this Service Handbook.
End of procedure.
Go to the next step listed below.
Replace the cable.
Perform the Serial Loopback Test.
Refer to Section 4.9
NO Replace the serial interface board.
Is the problem resolved?
YES End of procedure.
NO Go to the next step listed below.
YES Check the connection between the serial interface board
and the control board. Is the serial interface board properly
inserted into CN3 of the control board?
YES End of procedure.
NO Replace the control board.
Service Guide ML320/ML321
Chapter 4 Failure & Repair Analysis
of this Service Handbook.
Page: 97