Oki C7200 Service Manual - Page 75

Service Guide - C7000 Series Chapter 2 Operation Page: 36 2.12 Operation at Power-on 2.12.1 Self-diagnostic test (1) Initial test The followings are automatically performed at power-on. (a) ROM check (b) RAM check (c) EEPROM check (d) Flash ROM check (2) ROM check ROM is checked by calculating a HASH value. (3) RAM check (a) RAMs are by type. Out-of-specification RAM is judged as an error. (b) The order of mounted RAMs is checked. Out-of-standard order is judged as an error. (c) Each slot's RAM is checked by read-after-write operation. (4) EEPROM check Specific data stored at a fixed address of EEPROM is checked.. (5) Flash ROM check The flash ROM format is checked. Unformatted ROM is formatted after read-after-write checking. (6) Option unit check Before the printer goes into the operation mode, the presence of the option units (e.g., the HDD, NIC, option trays and duplex unit) is checked. Copyright 1999, Okidata, Division of OKI America, Inc. All rights reserved.