Ricoh D072 Service Manual page 278

827 Self-diagnostic Error: RAM
Verification error
Error is detected during a
[0201] B
write/verify check for the
standard RAM (SDRAM
DIMM).
Resident memory error
The SPD values in all RAM
[0202] B
DIMM are incorrect or
unreadable.
828 Self-diagnostic Error: ROM
Boost lap code error
The boot monitor and OS
program stored in the ROM
[0101] B
DIMM is checked. If the check
sum of the program is
incorrect, this SC code is
displayed.
SM Appendix
SC Tables (F/SPF: D068/D069)
Loose connection
Defective SDRAM DIMM
Defective controller
1. Replace the SDRAM
DIMM.
2. Replace the controller.
Defective RAM DIMM
Defective SPD ROM on RAM
DIMM
Defective 12C bus
1. Replace the RAM DIMM.
Defective ROM DIMM
Defective controller
1. Replace the ROM DIMM.
2. Replace the controller.
3-23 D067/D068/D069/D072