Led Head Cannot Be Recognized. (Error Code 131, 132, 133, 134); Service Call 131 To 134 (Led Head Missing); Toner Cartridge Cannot Be Recognized. (Error Code 540, 541, 542, 543); Error Caused By The Consumable Items - Oki MC561 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(14-1-3) 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-1 PCB)

7.5.4. (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 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
fuse on the CU/PU of each capacitor CP6 (C530/C330) and CP8
board (C510/C310) show 5V. (See section 7.6.)
Or, instead of the above, check if each fuse F501
(C530/C330) and F6 (C510/C310) is open or not.
44473001TH Rev.1
Check operation Actions for NG
results
Replace the
⑬
of the CU/PU board. CU/PU board.
Actions for NG
Check operation
results
Correct the
connection
to the normal
connecting
condition.
Replace the
head FFC or
CU/PU board.
Replace the
CU/PU board.

7.5.4. (16) Toner cartridge cannot be recognized. (error code 540, 541, 542, 543)

(16-1) Error caused by the consumable items.

Check item
(16-1-1) Consumable items installation condition
ID unit and toner Check that the ID unit is installed in the normal
cartridge position. Check that the lock lever of the toner
cartridge is locked.

(16-2) Error caused by the toner sensor

Check item
(16-2-1) Toner sensor condition
Toner sensor Is the receptor of the toner sensor stained?
Toner sensor Confirm that the toner sensor works normally by
using the SWITCH SCAN function of the self-
diagnostic mode.
Place a white paper in front of the toner sensor,
and check if the SCAN state changes or not.
7. TROUBLESHOOTING PROCEDURES
Check operation Actions for NG
results
Correct the
installation
to the normal
installation
condition.
Check operation Actions for NG
results
Wipe off the
stain from the
toner sensor.
Replace the
toner sensor
board, CU/PU
board, or FFC
that is located
between the
toner sensor
board and the
CU/PU board.
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