Ricoh D072 Service Manual page 277

SC Tables (F/SPF: D068/D069)
824
B
[1401]
B
826
B
D067/D068/D069/D072
Self-diagnostic Error: NVRAM
The controller cannot
recognize the standard
NVRAM installed or detects
that the NVRAM is defective.
Self-diagnostic Error: RTC/Optional NVRAM
[1501]: Clock error
An RTC device is
recognized, and the
difference between the
RTC device and the CPU
exceeds the defined limit.
No RTC device is
recognized.
[15FF]: RTC not detected
The RTC device is not
detected.
Loose connection
Defective standard NVRAM
Defective controller
1. Check the standard NVRAM is
firmly inserted into the socket.
2. Replace the NVRAM.
3. Replace the controller
RTC defective
1.
NVRAM without RTC installed
Backup battery discharged
1.
3-22
Replace the RTC device.
Replace the NVRAM with
another NVRAM with an
RTC device.
SM Appendix