44205401TH Rev.1
177 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
Check item Check work
Action to be taken
at NG
(14-2-2) Check the system connection
Check the system
connection from the
CU/PU board to the
option tray board
(V7Y PCB).
Check that the cable between the CU/PU board
option connector
to the option tray board is
normally connected.
Correct the
connections.
Square connector
connecting the
option tray unit to
the printer.
Check if any foreign material exists in the
connecting portion of the square connector.
Remove the
f
oreign material.
Square connector
connecting the
option tray unit to
the printer.
Is the terminals of the square connector
damaged?
Replace the
connector.
(14-2-3) Check the control signals.
Check the control
signal that is output
from the CU/PU
board to the option
tray board (V7Y
PCB).
Check the control signal that is output from the
CU/PU board option connector
.
Pin-5: TXD (PU
2nd)
Pin-3: RXD (2nd
PU)
Replace the
CU/PU board.
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/PU board
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 Remov
e 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/PU board.
Conduction of the
fuse on the CU/PU
board.
Check that 5V appears across the capacitor
CP8.
(Refer to section 7.6.)
Check if the fuses F15 and F12 are not open-
circuit or not.
Replace the
CU/PU board.
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