Brother International PT-9600 Service Manual - Page 27

2.1.9 AV Label Print Start Position Detector Mechanism (PT-9600/PT-3600 U.S.A.) This mechanism makes it possible to print at the proper position on Avery (AV) labels half-cut in a 24-mm-width AV labels tape. As shown below, it uses a reflection photosensor named AV print position sensor (AV sensor PCB ASSY). When a black detection mark (lower mark) printed on the back of an AV labels tape comes to the AV print position sensor, the sensor receives no reflected light, signaling the print start position. (1) Pressing the "Print" key will start tape feeding. (2) When a lower black detection mark on the back of an AV labels tape comes to the AV print position sensor, printing will start. (3) When the printed label exits from the tape cutter position, tape feeding will stop. The AV labels tape will be automatically cut off. Tape cutter Thermal head (1) Start tape feeding (2) Start printing (3) Stop printing and cut tape AV print position sensor Fig. 2.1-11 AV Label Print Start Position Detector Mechanism II-11