Ricoh D127 Field Service Manual page 180

6. Troubleshooting
[0201] B
[0202] B
828 Self-diagnostic Error: ROM
[0101] B
829 B
835 Self-diagnostic error: Centronic device
[1102] C
178
Verification error
Error is detected during a write/
verify check for the standard RAM
(SDRAM DIMM).
Resident memory error
The SPD values in all RAM DIMM
are incorrect or unreadable.
Boost lap code error
The boot monitor and OS program
stored in the ROM DIMM is
checked. If the check sum of the
program is incorrect, this SC code is
displayed.
Self-diagnostic Error: Optional RAM
Verify error for optional RAM.
[0301]
Verification error (Slot 1)
[0302]
Composition error (Slot 1)
Loopback connector is connected but
check results in an error.
• 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.
• Make sure that the resident RAM is
installed in the correct slot.
• Make sure the optional RAM is
installed in the correct slot (Slot 0)
• IEEE1284 connector error
• Centronic loopback connector
defective
1. Replace the controller board.