Oki Data CONFIDENTIAL
44871001TH Rev.6
8-40
8. TROUBLESHOOTING PROCEDURES
8.5.5.(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 board (98M)
Check the power supply using
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
Replace the low-voltage
power supply.
5V, and 24V power supplied
to SU board (MHE)
Check the power supply using
the POWER connector on the SU
board (MHE).
3, 4pin: 5V
7, 8pin: 24V
5, 6pin: 0VL
9, 10pin: 0VP
Replace the low-voltage
power supply.
3.3V power supplied to SU
board (MHE)
Check the power supply using
the GDIIF connector on the SU
board (MHE).
3pin: 3.3V
4, 6, 9pin: 0V
Replace the CU/PU
board (98M).
Check item Checking Action in case of fail
(1-1-5) Checking LSI operation
I/F signal from SU board
(MHE) to OPE board (OPM)
Check whether signals are output
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.
Replace the SU board
(MHE).
(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 board
(MHE).
(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.
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