Display Of Oki Logo; Error Message Display; Abnormal Mfp Operation After Powered On; No Operation - Oki MC561 Maintenance Manual

Oki Data CONFIDENTIAL

(1-2) Display of OKI logo

Check item
(1-2-1) Operation panel display does not change.
Operation panel display OKI logo stays on.

(1-3) Error message display

Check item
(1-3-1) Error message
Error message display Check the detail of the error on
the error message list.
44473001TH Rev.1
Checking Action in case of fail
Replace the SU PCB.
Checking Action in case of fail
Follow the instructions.

7.5.4.(2) Abnormal MFP operation after powered on

(2-1) No operation

Check item
(2-1-1) Checking power supplies
AC power supplied to the Check the supplied voltage from
printer the AC power source.
5V and 24V power supplied to Check the power supply using
CU/PU PCB the POWER connector on the
CU/PU PCB.
7, 8, 9pin: 24V
1, 2, 3pin: 5V
4, 5, 6pin: 0VL
10, 11, 12pin: 0VP
3.3V, 5V, and 24V power Check the power supply using
supplied to SU PCB the POWER connector on the SU
PCB.
1pin: 3.3V
3, 4pin: 5V
7, 8pin: 24V
2pin: 0V
5, 6pin: 0VL
9, 10pin: 0VP
(2-1-2) Checking connections
Connection between low- Make sure the low-voltage power
voltage power supply unit and supply unit is connected to the
CU/PU PCB POWER connector on the PU/CU
PCB properly.
Cable assembly connecting
Check whether the cable
low-voltage power supply unit
connector is half-connected
to CU/PU PCB
or tilted, or whether wires are
broken.
Check whether there is any
fault in the cable assembly, e.g.,
missing wires.
Connection between low- Do the checking as described in
voltage power supply unit and (1-1-2).
SU PCB
Cable assembly connecting
low-voltage power supply unit
to SU PCB
7. TROUBLESHOOTING PROCEDURES
Checking Action in case of fail
Supply AC power.
Replace the low-voltage
power supply.
Replace the low-voltage
power supply.
Connect the cable
properly.
Replace the cable with
a good cable.
Refer to (1-1-2).
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