Ricoh M0A0 Service Manual page 257

SC No. Level
SC152- D White level correction error: rear side
00
The automatic adjustment has failed to correct the white level (rear side) to the permissible range.
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Check if the SC occurs by turning the power OFF then ON. If the SC occurs again, do the
following steps. Check if the SC reoccurs by cycling the power after each step.
1.
2.
3.
4.
5.
SC No. Level
SC154- D SBU Communication Error: rear side
00
Cannot correctly establish communication with the SBU.
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Check if the SC occurs by turning the power OFF then ON. If the SC occurs again, do the
following steps. Check if the SC reoccurs by cycling the power after each step.
1.
2.
3.
4.
SC No. Level
SC161- D IPU error (DRAM initialization failure)
20
An error occurred every time the machine is turned on, or returns to full operation from energy
save mode.
IPU (BiCU) defective (Macaron/ DRAM device connection error) "DRAM device defective"
Error Name/Error Condition/Major Cause/Solution
BiCU defective
Harness defective
Connector defective (disconnected, loose)
White plate (rear side) dirty or installed incorrectly
Clean or replace the white plate (rear side).
Reconnect the following connectors;

SPDF CIS - BiCU harness (FFC)
Replace the SPDF CIS.
Replace the following harnesses;
 SPDF CIS - BiCU harness (FFC)
Replace the BiCU.
Error Name/Error Condition/Major Cause/Solution
SPDF CIS defective
BiCU defective
Harness defective
Connector defective (disconnected, loose)
Reconnect the following connectors;

SPSD CIS - BiCU harness (FFC)
Replace the SPDF CIS.
Replace the following harnesses;

SPDF CIS - BiCU harness (FFC)
Replace the BiCU.
Error Name/Error Condition/Major Cause/Solution
6.Troubleshooting
245