44473001TH Rev.1
241 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.4. (12) Motor fan error (error code 122, 128)
(12-1) The low voltage power supply fan does not rotate immediately after the power is
turned on.
Check item Check operation
Actions for NG
results
(12-1-1) Cable connection condition and wiring condition
Cable connection
condition and wiring
condition of the
low voltage power
supply fan and
those of the fuser
fan
Check if the connectors are connected normally
or not.
Check if extra length of the cables does not touch
the fan blade or not.
Correct the
connection
condition of the
connectors.
Correct the
cable wiring
route. Replace
the fan.
(12-2) All fans of the printer do not rotate.
Check item Check operation
Actions for NG
results
(12-2-1) 24V power supply
CU/PU board fuses,
F4 and F5
Ch
eck if the fuses F4 and F5 are not open-circuit
or not.
24V power
supplied to the
CU/PU board
24V power supplied
to the CU/PU board
Check the power supply voltages at the POWER
connector
of the PU/CU board.
Pins 7, 8 and 9: 24V
Pins 4, 5 and 6: 0VL
Pins 10, 11 and 12: 0VP
Replace the low
voltage power
supply.
7.5.4. (13) Print speed is slow. (Performance is low.)
(13-1) Print speed decreases.
Check item Check operation
Actions for NG
results
(13-1-2) Media Weight setting
Media Weight that
is specified for the
print
Check if the wrong Media Weight has been
specified or not.
Correct the
Media Weight.
7.5.4. (14) Option unit cannot be recognized.
(14-1) Option try unit cannot be recognized.
Check item Check operation
Actions for NG
results
(14-1-1) Option try board
Option tray unit Check if the option tray unit in use is of C310dn,
C330dn, C510dn, or C530dn specification.
Replace it with
an appropriate
option tray unit.
(14-1-2) Check the system connection
Connection
between the CU/PU
board and the
option tray board
(V7Y PCB)
Check that the cord between the 2ND connector
of the CU/PU board and the option tray board
is properly connected.
Co
rrect the
connections.
Square connector
connecting the
option tray unit with
the main unit
Check if any foreign material exists in the
connecting portion of the square connector.
Re
move
the foreign
material.
Square connector
connecting the
option tray unit with
the main unit
Is the terminals of the square connector
damaged?
Replace the
connector.
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