Gestetner B070 Service Manual page 364

SERVICE CALL CONDITIONS
SC824 Self-Diagnostic Error 3: NVRAM
Definition [B]
The NVRAM is not installed or is damaged.
Possible Causes
• NVRAM not installed
• NVRAM defective
• Controller board defective
• Backup battery has discharged
SC826: Self-Diagnostic Error 4: RTC Backup Battery Error
Definition [B]
The RTC backup battery has discharged or the voltage of the installed battery is
not within the specified range.
Possible Causes
• NVRAM installed incorrectly
• RTC backup battery defective
• Controller board defective
• NVRAM defective
SC828 Self-Diagnostic Error 5: ROM Error
Definition [B]
Measuring the CRC for the boot monitor and operating system program results in
an error. This check is not executed when booting the machine from an SD card.
Possible Causes
• SD card defective
• Controller board defective
SC829 Self-Diagnostic Error 6: Optional RAM
Definition [B]
A check of the optional RAM installed in Slot 0 on the controller board returned an
error.
Possible Causes
• RAM DIMM installed incorrectly
• RAM DIMM defective
• RAM DIMM slot damaged or defective; replace the controller board
B070/B071
CÓPIA NÃO CONTROLADA
4-44
CÓPIA NÃO CONTROLADA
SM