6.6 Power-up sequence
At start-up the timer automatically checks all the internal hardware and
particularly:
• Display lights ON
• LEDs light for 2 seconds
• CHECKSUM check of the storage program and display of the words
"CH0" if the check result is negative or in the event of non-initialized
memory
• Buzzer check (rings)
• Check of all buttons and X-ray buttons in particular, no button must
be pressed. If any buttons are pressed an error code message will
appear on the display
• Showing of software and hardware versions (HW: X.XX – SW: X.XX).
NOTE:
During the first start-up, the volatile memory may not be programmed
and therefore the "CH0" message will appear. In this case, press "F" key
to restore the factory default setting. The "CH0" message must not be
displayed any more.
If this happens again, replace the EEPROM on the CPU board and
proceed to the set-up sequence.
WARNING:
Replacing the EEPROM, all the custom tables will be lost.
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