prescribed threshold when the light error was detected during startup.
Error detection timing; During scanner startup (main power was turned on or the
machine returned from energy saving mode)
Check if the SC occurs by turning the main 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. Check the white guide plate (DF).
Check the white guide plate attached to the exposure glass. If the white guide
plate is in an unusual state, replace the white guide plate.
2. Reconnect the connector.
Reconnect the following connectors;
• Scanner Carriage – BiCU (PCB16) connector
• BiCU (PCB16) – IOB (PCB17) connector
3. BiCU (PCB16) defective
Replace the BiCU (PCB16).
4. CIS defective
Replace the CIS.
5. Harness defective
Replace the following harnesses.
• CIS CONNECT PCB (PCB28)– BiCU (PCB16) harness
• CIS – CIS CONNECT PCB (PCB28) harness
6. CIS CONNECT PCB (PCB28) defective Replace the CIS CONNECT PCB
(PCB28).
The home position is not correct when the main power is turned ON, at the end of
a reading process from the exposure glass and DF.
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