Ricoh MP C2504 Field Service Manual page 787

6. Troubleshooting
SC No.
SC144-00
778
Type Error Name/Error Condition/Major Cause/Solution
D SBU Communication Error
• The machine cannot detect that the Scanner Carriage is connected.
• The machine cannot communicate with the Scanner Carriage.
• The communication data is incorrect.
• Scanner Carriage defective
• IPU defective
• BCU defective
• Harness defective
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. Reconnect the following connectors;
• Scanner Carriage - IPU harness (FFC)
• IPU- BCU harness
2. Replace the Scanner Carriage.
3. Replace the IPU.
4. Replace the BCU.
5. Replace the following harnesses;
• Scanner Carriage - IPU harness (FFC)
• IPU - BCU harness