Oki MC351 User Manual

44473001TH Rev.1
215 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.4.(2) Abnormal MFP operation after powered on
(2-1) No operation
Check item Checking Action in case of fail
(2-1-1) Checking power supplies
AC power supplied to the
printer
Check the supplied voltage from
the AC power source.
Supply AC power.
5V and 24V power supplied to
CU/PU PCB
Check the power supply using
the POWER connector on the
CU/PU PCB.
7, 8, 9pin: 24V
1, 2, 3pin: 5V
4, 5, 6pin: 0VL
10, 11, 12pin: 0VP
Replace the low-voltage
power supply.
3.3V, 5V, and 24V power
supplied to SU PCB
Check the power supply using
the POWER connector on the SU
PCB.
1pin: 3.3V
3, 4pin: 5V
7, 8pin: 24V
2pin: 0V
5, 6pin: 0VL
9, 10pin: 0VP
Replace the low-voltage
power supply.
(2-1-2) Checking connections
Connection between low-
voltage power supply unit and
CU/PU PCB
Make sure the low-voltage power
supply unit is connected to the
POWER connector on the PU/CU
PCB properly.
Check whether the cable
connector is half-connected
or tilted, or whether wires are
broken.
Check whether there is any
fault in the cable assembly, e.g.,
missing wires.
Connect the cable
properly.
Cable assembly connecting
low-voltage power supply unit
to CU/PU PCB
Replace the cable with
a good cable.
Connection between low-
voltage power supply unit and
SU PCB
Do the checking as described in
(1-1-2).
Refer to (1-1-2).
Cable assembly connecting
low-voltage power supply unit
to SU PCB
(1-2) Display of OKI logo
Check item Checking Action in case of fail
(1-2-1) Operation panel display does not change.
Operation panel display OKI logo stays on. Replace the SU PCB.
(1-3) Error message display
Check item Checking Action in case of fail
(1-3-1) Error message
Error message display Check the detail of the error on
the error message list.
Follow the instructions.

Oki MC351 Specifications

General

Brand	Oki
Model	MC351
Category	All in One Printer
Language	English