Oki Data CONFIDENTIAL
42930511TH Rev. 2 50 /
2.12 Power ON Process
2.12.1 Self-Diagnostic Test
(1) Initial Test
When the power is turned On, the following check automatically takes place.
(a) ROM Check
(b) RAM Check
(c) EEPROM Check
(d) Flash ROM Check
(e) Mechanical Check
(f ) Option Unit Check
(2) ROM Check
The ROM is checked by calculating the HASH value.
(3) RAM Check
(a) The type of RAM is checked for its specifications. Any RAM that falls out of the
specifications will result in an Error.
(b) The RAM in each slot is checked by read-after-write.
(4) EEPROM Check
The specific data stored in the fixed address of the EEPROM is checked.
(5) Flash ROM Check (600dpi only)
The flash ROM format is checked. If it is unformatted, then read-after-write check takes
place and the flash ROM is formatted.
(6) Option Unit Check
Before entering the run mode, the unit is checked for the presence of an optional units
(HDD, NIC, Option Tray, Double-Side Printer Unit, Finisher, etc.).
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