Sirona DAC PROFESSIONAL, Руководство по обслуживанию

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Fault-diagnosis DAC Professional
Fault 29: Battery RAM
FAULT 29: Battery RAM
Triggered by:
In the data memory of the CPU there is a data inconsistency or a loss of data, This can be due to an electrical
disturbance (e.g. very high power supply disturbances), a low battery voltage or a hardware defect in the RAM. On
quitting the fault the clock time is automatically set at 00:00 and the load counter is reset to the value from the
EEPROM. At the same time all record data in the memory is deleted.
Causes / Remedy
Operating fault / Checks by personnel:
•
After quitting the malfunction report: Enter correct time and date settings and restart a program.
Appliance fault / Repair by technical service personnel
►
Battery voltage too low
•
If fault occurs regularly exchange battery on CPU- board (battery connections soldered)
►
Fault in RAM
•
If after exchanging the battery there is still a malfunction report, then there is a permanent fault in the
RAM - replace the CPU board
09/21/2006 38/61 Servicemanual DAC Professional