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41388601TH Rev.2 38 /
2.12 Operation at Power-on
2.12.1 Self-diagnostic test
(1) Initial test
The following checks are automatically performed at power-on.
(a) ROM check
(b) RAM check
(c) EEPROM check
(d) Flash ROM check
(2) ROM check
The ROM is checked by calculating a HASH value.
(3) RAM check
(a) Checking is conducted by RAM type. Out-of-specification RAM is judged as an error.
(b) The order of mounted RAMs is checked. Out-of-standard RAM is judged as an error.
(c) The RAM in each slot is checked by read-after-write operation.
(4) EEPROM Check
Specific data stored at the fixed EEPROM address is checked.
(5) Flash ROM Check
The flash ROM format is checked. Unformatted ROM is formatted after the read-after-write
checking.
(6) Option Unit Check
Checking whether the option units (including a HDD, NIC, option trays and the duplex unit)
are equipped with the printer is performed.