Drum unit non- installing error
The drum unit is not installed or not
installed properly.
The drum PWB EEPROM does not communicate
normally.
Causes:
- The drum unit is not installed.
- Defective connection drum PWB (YC1) and connect-L PWB (YC3).
- Defective drum PWB EEPROM.
- Defective engine PWB.
Check procedures/corrective measures:
- Install the drum unit
- Check the connection of connectors drum
PWB (YC1) and connect-L PWB (YC3).
- Replace the drum unit
- Replace the engine PWB
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