Ricoh G104 - Page 358

Service Call Conditions
G160/G161 4-24 SM
SC
[Level]
Symptom Possible Cause/Required Action
Self-diagnostic Error: NVRAM
824
[B]
The controller cannot
recognize the standard
NVRAM installed or detects
that the NVRAM is defective.
 NVRAM damaged or abnormal
 Backup battery has discharged
 NVRAM socket damaged
1. Replace the NVRAM.
826 Self-diagnostic Error: RTC/Optional NVRAM
Clock error
[1501]
[B]
 An RTC device is
recognized, and the
difference between the
RTC device and the CPU
exceeds the defined
limit.
 No RTC device is
recognized.
 RTC defective
 NVRAM without RTC installed
 Backup battery discharged
1. Replace the NVRAM with another
NVRAM with an RTC device.
RTC not detected
[15FF]
[B]
The RTC device is not
detected.
 NVRAM without RTC installed
 Backup battery discharged
1. Replace the NVRAM with another
NVRAM with an RTC device.
827 Self-diagnostic Error: RAM
Verification error
[0201]
[B]
Error is detected during a
write/verify check for the
standard RAM (SDRAM
DIMM).
 Loose connection
 Defective SDRAM DIMM
 Defective controller
1. Replace the SDRAM DIMM.
2. Replace the controller.
Resident memory error
[0202]
[B]
The SPD values in all RAM
DIMM are incorrect or
unreadable.
 Defective RAM DIMM
 Defective SPD ROM on RAM DIMM
 Defective 12C bus
1. Replace the RAM DIMM.
828 Self-diagnostic Error: ROM
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