User guide

48 170PAX 4 User Guide 10/12/2004 57516L-001 Rev. 1

Print Engine Operation

Adjust Media Sensors

This section describes how to adjust the media sensors.

Reflective Media Sensor

Some types of media have black marks printed on the underside of the media liner, which act

as “start of label” indicators. The reflective media sensor senses these black marks. The

position of this sensor is not adjustable. If you use this type of media, refer to Media

Specifications on page 112 for information about black mark requirements.

Transmissive Media Sensor

The transmissive media sensor finds “start of label” indicators, such as notches or holes in the

media or interlabel gaps. This sensor consists of a light source (positioned below the media)

and a light sensor (positioned above the media).

To position the sensor, complete these steps:

1. Refer to Figure 35. Turn the adjustment knob on the media guide shelf assembly to move

the media sensor.

2. How does the current media indicate the start of labels?

If the media... Then...

Has notches or holes

between labels

Align the sensor with the notch or hole in the media.

Uses interlabel gaps Position the sensor approximately at the center of the media

width.