Ricoh Aficio MP201SPF Service Manual page 209

No.
Symptom
Definition
Self-diagnostic Error: NVRAM
The controller cannot recognize
824
B
the standard NVRAM installed
[1401]
or detects that the NVRAM is
defective.
Self-diagnostic Error: RTC/Optional NVRAM
[1501]: Clock error
B
826
[15FF]: RTC not detected
B
The RTC device is not detected.
SM
An RTC device is
recognized, and the
difference between the RTC
device and the CPU
exceeds the defined limit.
No RTC device is
recognized.
6-21
Possible Cause/Countermeasure
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. Replace the RTC device.
NVRAM without RTC installed
Backup battery discharged
1. Replace the NVRAM with
another NVRAM with an RTC
device.
SC Tables
D115/D116