Service manual

SC Tables
SM 6-21 D127/D128
Trouble –
shooting
No.
Definition
Symptom Possible Cause/Countermeasure
820 Self-Diagnostic Error: CPU
B
 [0001-0015] [000A-000D]: Detailed error code
During the boot monitor
program and self-diagnostic,
any exception or cut-in are not
supposed to happen. If these
happen, it is defined as SC.
 Defective CPU device
 Defective boot monitor program
or self-diagnostic program
1. Replace the controller board.
2. Reinstall the system firmware.
B
[00FF]: Detailed error code
Cache access error in the CPU
 Defective CPU
 Defective local bus
1. Turn the main power switch off
and on.
2. Reinstall the system program.
3. Replace the controller board.
B
[0601, 0602, 0605, 0606, 0607, 0609]: Detailed error code
Exceptional command does not
operate even though it is
executed on purpose.
 Defective CPU devices
1. Replace the controller board.
B
[060A-060E]: Detailed error code
Cut-in command does not
operate when it is executed.
 Defective CPU devices
 Defective ASIC devices
1. Replace the controller board.
B
[0610]: Detailed error code
Timer cut-in does not operate
even though it is set.
 Defective CPU devices
1. Replace the controller board.