SC Tables
SM 6-21 D115/D116
Trouble-
shooting
No.
Definition
Symptom Possible Cause/Countermeasure
824
[1401]
B
Self-diagnostic Error: NVRAM
The controller cannot recognize
the standard NVRAM installed
or detects that the NVRAM is
defective.
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
826
B
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.
RTC defective
1. Replace the RTC device.
B
[15FF]: RTC not detected
The RTC device is not detected.
NVRAM without RTC installed
Backup battery discharged
1. Replace the NVRAM with
another NVRAM with an RTC
device.
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