Led Head Cannot Be Recognized. (Error Code 131, 132, 133, 134); Service Call 131 To 134 (Led Head Missing) - Oki C711 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(14-2-2) Check the system connection
Check the system Check that the cable between the CU/PU board
connection from the option connector
CU/PU board to the normally connected.
option tray board
(V7Y PCB).
Square connector Check if any foreign material exists in the
connecting the connecting portion of the square connector.
option tray unit to
the printer.
Square connector Is the terminals of the square connector
connecting the damaged?
option tray unit to
the printer.
(14-2-3) Check the control signals.
Check the control Check the control signal that is output from the
signal that is output CU/PU board option connector
from the CU/PU
Pin-5: TXD (PU
board to the option
Pin-3: RXD (2nd
tray board (V7Y
PCB).
44205401TH Rev.1
Action to be taken
Check work
at NG
Correct the
to the option tray board is connections.
Remove the
foreign material.
Replace the
connector.
Replace the
. CU/PU board.
2nd)
PU)

7.5.2. (15) LED head cannot be recognized. (error code 131, 132, 133, 134)

(15-1) Service call 131 to 134 (LED HEAD Missing)

Check item
(15-1-1) Check the system connection
Connecting condition Check the connecting condition of the FFC by
at the CU/PU board the visual inspection.
connector and at 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 5V appears across the capacitor
fuse on the CU/PU CP8. (Refer to section 7.6.)
board.
Check if the fuses F15 and F12 are not open-
circuit or not.
7. Troubleshooting and repair procedure
Action to be taken
Check work
at NG
Correct the
connection
to the normal
connecting
condition.
Replace the
head FFC or the
CU/PU board.
Replace the
CU/PU board.
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