44205401TH Rev.1
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Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
7.5.2. (13) Print speed is slow. (Performance is low.)
(13-1) Print speed decreases.
Check item Check work
Action to be taken
at NG
(13-1-2) Media Weight setting
Media Weight that is
specified for the print
Check if the wrong Media Weight has been
specified or not.
Correct the
Media Weight.
7.5.2. (14) Option unit cannot be recognized.
(14-1) Duplex unit cannot be recognized.
Check item Check work
Action to be taken
at NG
(14-1-1) Duplex board
Duplex unit Check if the Duplex unit of C711 specification is
being used or not.
Replace the
Duplex unit.
(14-1-2) Check the system connection
Check the system
connection from the
CU/PU board to the
Duplex board (V7Y
PCB).
Check that the cable between the CU/PU board
option connector
to the Duplex board is
normally connected.
Correct the
connections.
Square connector
connecting the
Duplex unit to the
printer.
Check if any foreign material exists in the
connecting portion of the square connector.
Remove the
foreign material
.
Square connector
connecting the
Duplex unit to the
printer.
Is the terminals of the square connector
damaged?
Replace the
connector.
(14-1-3) Check the control signals.
Check the control
signal that is output
from the CU/PU
board to the Duplex
board (V7Y PCB).
Check the control signal that is output from the
CU/PU board option connector
.
Pin-6: TXD (PU
DUP)
Pin-4: RXD (DUP PU)
Replace the
CU/PU board.
(14-2) Option try unit cannot be recognized.
Check item Check work
Action to be taken
at NG
(14-2-1) Option try board
Option try unit Check if the option tr
y unit of C711 specification
is being used or not.
Replace the
option tray unit.
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