Ricoh B202 Service Manual page 260

SC No. Item
SC 824 Self-diagnosis The controller cannot
error: Standard recognize the standard
[1401]
NVRAM NVRAM installed or detects
that the NVRAM is defective.
SC 826
[1501] Self-diagnostic • An RTC device is
Error: RTC/
Optional
NVRAM
• No RTC device is
[15FF] Self-diagnostic • The RTC device is not
Error: RTC/
Optional
NVRAM
SC 827
[0201] Verification Error detected during a
error write/verify check for the
standard RAM (SDRAM
DIMM).
[0202] Resident The SPD values in all RAM
memory error DIMM are incorrect or
unreadable.
SC 828
[0101] Check sum The boot monitor and OS
error 1 program stored in the ROM
DIMM is checked. If the check
sum of the program is
incorrect, this SC code is
displayed.
SM
Definition
• Loose connection
• Defective standard
• Defective controller
Self-diagnostic error: RTC
• RTC defective
recognized, and the • NVRAM without RTC
difference between the RTC
device and the CPU
• Backup battery
exceeds the defined limit.
recognized.
• NVRAM without RTC
detected.
• Backup battery
Self-diagnostic error: Standard SDRAM DIMM
• Loose connection
• Defective SDRAM
• Defective controller
• Defective RAM DIMM
• Defective SPD ROM
• Defective 12C bus
Self-diagnostic error : ROM
• Defective ROM DIMM
• Defective controller
Related
Possible Cause
SCs
NVRAM
[XXXX]: Detailed error code
installed
discharged
installed
discharged
[XXXX]: Detailed error code
DIMM
on RAM DIMM
[XXXX]: Detailed error code
4-45
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Check the standard NVRAM is firmly
inserted into the socket.
3. Replace the NVRAM.
4. Replace the controller.
1. Turn the main switch off and on.
2. Replace the NVRAM with another
NVRAM with an RTC device.
1. Turn the main switch off and on.
2. Replace the NVRAM with another
NVRAM with an RTC device.
1. Turn the main switch off and on.
2. Replace the SDRAM DIMM.
3. Replace the controller.
1. Replace the RAM DIMM.
1. Turn the main switch on and off.
2. Replace the ROM DIMM
3. Replace the controller.
SC TABLE
Type
CTL
CTL
CTL
CTL
CTL
CTL
B202/178/B180