Display Of Oki Logo; Error Message Display; Abnormal Mfp Operation After Powered On; No Operation - Oki MB461 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(1-1-5) Checking LSI operation
I/F signal from SU board Check whether signals are output
(MHE) to OPE board (OPM) to the OPE connector on the SU
board (MHE).
9pin: Transmission data (sent
from the SU board (MHE))
11pin: Clock
13pin: Enabling
15pin: Reset
Signals should be always output
under normal conditions.

(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.
44871001TH Rev.6
Checking Action in case of fail
Replace the SU board
(MHE).
Checking Action in case of fail
Replace the SU board
(MHE).
Checking Action in case of fail
Follow the instructions.

8.5.5.(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 board (98M) the POWER connector on the
CU/PU board (98M).
7, 8, 9pin: 24V
1, 2, 3pin: 5V
4, 5, 6pin: 0VL
10, 11, 12pin: 0VP
5V, and 24V power supplied Check the power supply using
to SU board (MHE) the POWER connector on the SU
board (MHE).
3, 4pin: 5V
7, 8pin: 24V
5, 6pin: 0VL
9, 10pin: 0VP
3.3V power supplied to SU Check the power supply using
board (MHE) the GDIIF connector on the SU
board (MHE).
3pin: 3.3V
4, 6, 9pin: 0V
8. TROUBLESHOOTING PROCEDURES
Checking Action in case of fail
Supply AC power.
Replace the low-voltage
power supply.
Replace the low-voltage
power supply.
Replace the CU/PU
board (98M).
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