HP 200 Service Manual page 37

4. Rear Edge Clears Primary Flag
Drive roller
slow speed
inwards
Media inserted
Secondary flag
D Media: clears the primary flag
D Primary flag: rotates 90 clockwise (original position active)
D Secondary flag: still in previous position (active)
D Optical sensor: optical path blocked by falling edge of primary flag
D Driver roller: slows down but still rotating inwards...
D Front Panel: Load Media LED off, Busy LED on
D Media Length Measurement: rear edge detected
As soon as the optical sensor detects that the primary flag is back in it's original position, the
roller motion slows down but needs some time to overcome the system's inertia before being
able to reverse the direction of rotation.
C3187 90000
Leading edge of media
Primary flag
Photo sensor window
Functional Overview 5 5