Service manual

SC Tables
SM 6-25 D127/D128
Trouble –
shooting
No.
Definition
Symptom Possible Cause/Countermeasure
[6105] C
PHY IC loop-back error
An error occurred during the
loop-back test for the PHY IC on
the controller.
Same as SC823-[6101]
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.