Operation at Power-on

2.12 Operation at Power-on

2.12.1Self-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.

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