Option Unit Cannot Be Recognized; Option Try Unit Cannot Be Recognized; Led Head Cannot Be Recognized. (Error Code 131, 132, 133, 134); Service Call 131 To 134 (Led Head Missing) - Oki MB461 Maintenance Manual

Oki Data CONFIDENTIAL

8.5.5. (12) Option unit cannot be recognized.

(12-1) Option try unit cannot be recognized.

Check item
(12-1-1) Option try board
Option tray unit Check that it is Option Tray which can be used in
MB4xx.
(12-1-2) Check the system connection
Connection Check that the cord between the 2ND connector
between the CU/PU of the CU/PU board and the option tray board is
board and the properly connected.
option tray board
(GOG PCB)
Square connector Check if any foreign material exists in the
connecting the connecting portion of the square connector.
option tray unit with
the main unit
Square connector Is the terminals of the square connector
connecting the damaged?
option tray unit with
the main unit
(12-1-3) Check the control signals.
Control signal that Check the control signals that are output from the
is output from the 2ND connector
CU/PU board to the
Pin 6: TXD (PU -> 2nd)
option tray board
Pin 5: RXD (2nd -> PU)
(GOG PCB)
44871001TH Rev.6
Check operation Actions for NG
results
Replace it with
an appropriate
option tray unit.
Correct the
connections.
Remove the
foreign material.
Replace the
connector.
Replace the
of the CU/PU board. CU/PU board.

8.5.5. (13) LED head cannot be recognized. (Error code 131, 132, 133, 134)

(13-1) Service call 131 to 134 (LED HEAD Missing)

Check item
(13-1-1) Check the system connection
Connecting Check the connecting condition of the FFC by
condition of the CU/ the visual inspection.
PU board connector
and the head
connector
Head FFC Remove the head FFC from the printer. Check
if any open-circuit or peeling-off of sheath has
occurred or not throughout the cable.
Conduction of the Check that measurements taken at both ends of
fuse on the CU/PU each capacitor CP12 show 5V. (See section 7.6.)
board Or, instead of the above, check if each fuse F502
is open or not.
8. TROUBLESHOOTING PROCEDURES
Check operation Actions for NG
results
Correct the
connection
to the normal
connecting
condition.
Replace the head
FFC or CU/PU
board.
Replace the
CU/PU board.
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