Konica Minolta AFR-12 General, Mechanical/Electrical page 38

– Other Sensors Check –
LD1, LD3 Japan Only
LD4 (Document Feed Motor Pulse Sensor) lights up when the sensor is blocked,
and goes out when the sensor is unblocked.
AFR-12/AF-5
LD1: Size Sensor (Rear)
LD2: Size Sensor (Center)
LD3: Size Sensor (Front)
LD4: Document Feed Motor Pulse Sensor
(M1CLK)
NOTE
S-8
PWB-C
Rev. 1.0/05.99