Swecoin TTP 5200, Service Manual

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TTP 52x0 Series Kiosk Printer — Service Manual December 2001 8
2.2 Paper near-end detection
All Swecoin roll holders have an optical reflection sensor that becomes actuated when
there is about 3 m paper left (see Figure 3). This is the paper near end sensor.
In addition, the optional paper roll holders for larger paper rolls have an adjustable paper
level sensor (see Figure 4) that can be used, for example, to decide whether or not the
remaining paper will last during a weekend, thus called “Weekend sensor”.
The paper end & TOF sensor (reflector sensor) inhibits printing if there is no paper at all in
the printer module.
Optical paper level sensor, “weekend sensor”.
Adjustment range: 80 ±20 mm
equal to approximately
30—150 m remaining paper.
Lock screw
Optical paper-near-end
sensor.
Activated when
2–4 m remains.
SW95003A-R1
Figure 4. Paper sensor roll holder for 200-mm diameter rolls (optional)
2.3 Paper jam detection
The application program knows the length of each document. If the presenter sensor does
not detect the leading edge of a document when expected, this will be interpreted as if
paper jam has occurred. Paper jam error will also be signaled if the presenter sensor
detects paper in unexpected situations.