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Error code: 150C
PG position undetectable error
When changing the PG, the PG sensor could not detect the PG position.
Check points :
Is the PG Sensor out of order? Does the light shielding plate react to the sensor?
Do the planetary gearing work normally? Do the planet gears and outer gears properly engage with each other?
Is the CR Unit out of its home position?
Replace the PG Sensor.
Replace the APG Assy.
Remove any obstacles around the CR Unit home position. The printer changes the PG with the CR Unit being at its home position.