Oki Data CONFIDENTIAL
43967002TH Rev. 1
343 /
7. Troubleshooting
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
Check work
Action to be taken at NG
(15-1-1) Check the system connection
Connecting
condition at the
CU PCB connector
and at the head
connector
Check the connecting condition of the FFC
by the visual inspection.
Correct the
connection to the
normal connecting
condition.
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.
Replace the head
FFC or the CU PCB.
Conduction of the
fuse on the CU PCB
Check that 5V appears across the
capacitors CP7 and CP8. (Refer to item 7.)
Replace F504, F506
or replace the CU
PCB.
7.5.2.(16) Toner cartridge cannot be recognized. (Error code 540, 541, 542, 543)
(16-1) Error caused by the consumable items
Check item
Check work
Action to be taken at NG
(16-1-1) Consumable items installation condition
ID unit and toner
cartridge
Check that the ID unit is installed in the
normal position. Check that the lock lever
of the toner cartridge is locked.
Correct the
installation to the
normal installation
condition.
(16-2) Error caused by the toner sensor
Check item
Check work
Action to be taken at NG
(16-2-1) Toner sensor condition
Toner sensor
Is the receptor of the toner sensor stained? Wipe off the stain
from the toner
sensor.
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.
Replace the toner
sensor PCB (PRZ.
PCB), or the PU
PCB, or the FFC
between the PRZ
and the PRX.
