Ricoh D009 Service Manual page 263

Self-diagnostics error: ASIC
821 D
[XXXX]: Detailed error code
ASIC error
The write-&-verify check error has occurred in the ASIC.
[0B00]
Defective ASIC device
Replace the controller board.
ASIC detection error
The I/O ASIC for system control is not detected.
[0B06]
Defective ASIC
Defective North Bridge and PCI I/F
Replace the controller board.
SHM register error
The initialization of bus connection or read for SHM fails.
The register of SHM is different from the specified value.
[0B10]
Defective connection bus
Defective SHM
Replace the controller board.
Self-diagnosis error: ASIC
The CPU checks if the ASIC timer works correctly compared with the CPU
timer. If the ASIC timer does not function in the specified range, this SC code
is displayed.
[0D05]
System firmware problem
Defective RAM-DIMM
Defective controller
Replace the controller board.
For more details about this SC code error, execute SP5990 to print an SMC report
so you can read the error code. The error code is not displayed on the operation
panel.
SM 4-37
SC Tables: SC8xx -1
D009/D011/D012/D013