Citizen CL-S400DT User Manual page 22

Chapter 2 Printer Operation
Setting the Media
Sensor Selection Method
(Transparent  Reflective)
(p.45)
Adjusting the Transparent
sensor (p.46)
Installing the Media
1. Push the cover open lever to release the printer cover. It can
be opened to the position shown below by lifting the printer
cover by hand.
2. Setting sensor positions.
 When using a transparent sensor
1 Move the bottom sensor to the middle of the width of the
media.
22
Cover
open lever
Adjust it to the middle of
the width of the media.
Transparent sensor marker