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Oki Data CONFIDENTIAL
44158801TH Rev.2
256 /
8.5.2.(13)
Option unit is not recognized
(13-1) Duplex unit is not recognized
Confirmation Items
Confirmation Tasks
Action at NG
(13-1-1) Duplex PCB
Duplex unit
Check to see if the duplex unit in use conforms to the
MC560 specification (A unit conforming to the C3200/
C5540/C5510/C5450/C5250/C3100/ML3100/C5200/
ML5200/C5100/ML5100/C5300/ML5300 specification
cannot be connected).
Replace the Duplex
unit.
(13-1-2) Check of connections
Connections from PU PCB
(PRF PCB) to duplex PCB
(V7Y PCB).
Check to make sure that the cord is properly connected
from the DU connector of the PU PCB (PRF PCB) to the
duplex PCB.
Correct the
connections.
Square connector
connecting the duplex unit
to the printer
Check to see if there is any foreign matter trapped in the
connecting part of the square connector
Remove the foreign
matter.
Square connector
connecting the duplex unit
to the printer
Check to see if the pins of the square connector are
broken.
Replace the
connector.
(13-1-3) Check of control signal
Signal delivered from PU
PCB (PRF PCB) to duplex
(V7Y PCB)
Check the signal delivered through the OPTLPN
connector of the PU PCB (PRF PCB).
Pin 6: TXD (PU
DUP)
Pin 4: RXD (DUP
PU)
Replace the PU
PCB (PRF PCB).
(13-2) 2nd Tray unit is not recognized
Confirmation Items
Confirmation Tasks
Action at NG
(13-2-1) 2nd tray PCB
2nd tray unit
Check to see if the 2nd tray unit in use conforms to the
MC560 specification (A unit conforming to the C5800n/
C3200/C5540/C5510/C5450/C5250/C3100/ML3100/
C5200/ML5200/C5100/ML5100/C5300/ML5300
specification cannot be connected).
Replace the 2nd tray
unit.
(13-2-2) Check of connections
Connections from PU PCB
(PRF PCB) to 2nd tray
PCB (V7Y PCB)
Check to make sure that the cord is properly connected
from the 2nd connector of the PU PCB (PRF PCB) to the
2nd tray PCB.
Correct the
connections.
Correct the connections.
Check to see if there is any foreign matter trapped in the
connecting part of the square connector.
Remove the foreign
matter.
Square connector
connecting the 2nd tray
unit to the printer
Check to see if the pins of the square connector are
broken.
Replace the
connector.
(13-2-3) Check of control signal
Signal delivered from PU
PCB (PRF PCB) to 2nd
tray PCB (V7Y PCB)
Check the signal delivered through the 2nd connector of
the PU PCB (PRF PCB).
Pin 5: TXD (PU
2nd)
Pin 3: RXD (2nd
PU)
Replace the PU
PCB (PRF PCB).