10
IX.
Sensors Introduction and Repair Instruction
Sensor
：
transmitter and receiver.
Normally, the transmitter lights up all the time, and the receiver would
not light up. If the receiver lights up, it means that it is not aligning to the
corresponding transmitter or it is blocked by something.
There are five pairs of sensors of each lane. The no. and transmit
direction of each pair of sensors are as shown as above.
