44015503TH Rev. 1
205 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURE
(12-3) All fans of the printer do not rotate.
Check item Check work
Action to be taken
at NG
(12-3-1) 24V power supply
PU board fuses F4,
F5
Chec
k if the fuses F4 and F5 are not open-
circuit or not.
Replace the PU
board.
24V power that is
supplied to the PU
board.
Check the power supply voltages at the POWER
connector of the PU board. The follow voltage
must appear respectively.
Pins-4, 5 and 6: 24V
Pin-8:
0VL
Pins-1, 2 and 3: 0VP
Replace the low
voltage power
supply.
7.5.2.(13) Print speed is slow. (Performance is low.)
(13-1) Print speed decreases.
Check item Check work
Action to be taken
at 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.
7.5.2.(14) Option unit cannot be recognized.
(14-1) Duplex unit cannot be recognized.
Check item Check work
Action to be taken
at NG
(14-1-1) Duplex board
Duplex unit Check if the Duplex unit of C830 specification is
being used or not.
Replace the
Duplex unit.
(14-1-2) Check the system connection
Check the system
connection from
the PU board to the
Duple
x board (V7Y
PCB).
Check that the cable between the PU board
option connector to the Duplex board is
normally connected.
Correct the
connections.
Square connector
connecting the
Duplex unit to the
printer.
Check if any foreign material exists in the
connecting portion of the square connector.
Remove the
foreign material.
Square connector
connecting the
Duplex unit to the
printer.
Is the terminals of the square connector
damaged?
Replace the
connector.
(14-1-3) Check the control signals.
Check the control
signal that is output
from the PU board
to the Duplex board
(
V7Y PCB).
Check the control signal that is output from the
PU board option connector .
Pin-6: TXD (PU
DUP)
Pin-4: RXD (DUP PU)
Replace the PU
board.
(14-2) Option try unit cannot be recognized.
Check item Check work
Action to be taken
at NG
(14-2-1) Option try board
Option tr
y unit Check if the option try unit of C830 specification
is being used or not.
Replace the
option tray unit.
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