44952001TH Rev.2
7-76
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.5. (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 Checking method Action in case of NG
(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 Checking method Action in case of NG
(12-2-1) 24V power supply
CU/PU board fuses,
F4 and F5
Check 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 CU/PU 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.
7.5.5. (13) Print speed is slow. (Performance is low.)
(13-1) Print speed decreases.
Check item Checking method Action in case of NG
(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.
7.5.5.(14)Optionunitcannotberecognized.
(14-1)Optiontrayunitcannotberecognized.
Check item Checking method Action in case of NG
(14-1-1) Option try board
Option tray unit Check if the option tray unit in use is
of MC562dn, MC362dn or MC352dn
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
Check that the cord between the 2ND
connector
of the CU/PU board and the
option tray board is properly connected.
Correct 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.
Remove 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.
(14-1-3) Check the control signals.
Control signal that
is output from the
CU/PU board to the
option tray board
Check the control signals that are output
from the 2ND connector
⑬
of the CU/PU
board.
Pin 6: TXD (PU -> 2nd)
Pin 5: RXD (2nd -> PU)
Replace the CU/PU
board.
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