6.Troubleshooting
544
Service Call 202-270
SC200 (Engine: Image Writing)
Error Name/Error Condition/Major Cause/Solution
After Polygon motor (M5) is stabilized, the ready signal is at the H level for 20
seconds consecutively.
• Polygon motor (M5) defective
• IOB (PCB17) defective
• Polygon motor (M5) defective
1. Confirm that the connector between the laser unit and IOB (PCB17) is
firmly connected. If necessary, connect the connector all the way in.
2. If the connector is broken, shorted, or grounded, replace the connector.
3. Replace the laser unit.
• IOB (PCB17) defective
1. Update the engine software to the latest version.
2. Replace the IOB (PCB17).
Error Name/Error Condition/Major Cause/Solution
Leading Edge: LD synchronization detection error
The leading edge LD synchronization detection signal did not output within the
specified time (sec.) while the polygon mirror motor was operating at normal
speed.
Error detection timing; During the startup operation of the machine or during
printing.
• Laser unit defective (Synchronization optical system defective, LDB (PCB5)
defective, LD defective)
• BiCU (PCB16) defective (Image writing ASIC defective)
• IOB (PCB17) defective
• LDB (PCB5) – IOB (PCB17), IOB (PCB17) – BiCU (PCB16) harness broken,
or connector disconnected
1. Turn the main power OFF/ON.
2. Check for condensation on the mirrors and lenses.
3. Reconnect the connectors between LDB (PCB5) and IOB (PCB17), and
between IOB (PCB17) and BiCU (PCB16).
4. Replace the laser unit.
5. Replace the BiCU (PCB16).
6. Replace the harness between LDB (PCB5) and IOB (PCB17), and between
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