I keep getting this error code on my Panasonic DP-4520 copier How can fix it. Error code E03-40
Panasonic dp-4520 copier. e4-02 error code
E3-40 - Copy Density Sensor output adjustment
1. Sensor connector is disconnected.
2. Sensor is defective.
3. SPC PCB connector is disconnected.
4. SPC PCB is defective.
1. clean the drum sensor
2. Clean inside the machine
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