Ricoh D131 Service Manual page 570

823 6104 PHY chip ID illegal
823 6105 PHY loopback error
824 1401 NVRAM verify error
826 1501 Clock error
826 15FF RTC non-detection error
826 0201 Resident memory verify error
828 0101 Boost trap code (CODE) error
828 0104 ROM FS error
828 0105 Forgery prevention error
829 0301 Option memory 0 verify error
Option memory 0 configuration
829 0302
information error
SM Appendix

Controller board defective

NVRAM defective

Optional NVRAM defective

Incompatible NVRAM
installed

NVRAM battery defective

Memory on controller
board defective

RAM DIMM defective

Software storage error
(re-install software)

Controller board defective

ROM device error

Forgery prevention chip
defective

Forgery prevention chip
error

Replace the controller,
ROM, or RAM DIMM

Controller board internal
memory error

RAM DIMM defective
2-103
SC900: Miscellaneous
D131/D132/D133