UBI EasyCoder 501 – Service Manual83The Label-Taken Sensor (LTS) is an optional device for theEasyCoder 501 E and EasyCoder 501 SA, which enables theprinter's software to detect if the latest printed label, ticket, tag etc.has been removed before printing another copy.The label-taken sensor is usually factory-fitted, but it is alsoavailable as a kit for upgrading of existing printers. It cannot befitted in combination with a paper cutter.The label-taken sensor consists of a photoelectric sensor with abracket and a connection cable. The sensor is fitted inside the fronthatch, see illustration below.The photoelectric sensor emits a narrow beam of light, which willbe reflected back to the sensor by any label, ticket, tag, piece of stripor backing paper, that has not been removed from the outfeed area.A prerequisite is that the web is fed out along the inner wall of theprinter.The LTS is connected to P-606 on the CPU board. The sensitivityof the receiver can be adjusted by means of the potentiometer WR-602 and the intensity of the emitter by a strap on P-607 on the CPUboard.11.1Description11. LABEL-TAKEN SENSORLabel-Taken SensorThe point of detection of the LTS issituated 10 mm (0.39") outside the inneredge of the paper web and 22 mm (0.87")in front of the dot line on the printhead(present type of LTS).In the old type of LTS (distinguished bythe absence of any semicircular slot inthe bracket), the point of detection issituated 24 mm (0.95") in front of the dotline, whereas the lateral position is thesame.Vertical detection range is adjustablefrom 5 mm (0.2") above the edge of thetear-off/dispenser edge to max. 50 mm(2") below the edge (with strap fitted onP-607).
