Sensor Adjustment - Star TSP400 Installation Manual

Sensor Adjustment

Sensor levels are adjusted at the factory. If necessary, you can readjust the
levels as described below.
1) Remove the ROM cover located beneath the paper-roll holding area.
2) Hold down the FEED and ON LINE switches while switching on the power, and
continue to hold them down until you hear a triple beep. (This will take about
five seconds.) When you hear the triple beep, release the buttons to enter
sensor-adjustment mode.
a) Reflective Sensor
• Insert a non-black area of paper into the mechanism's sensor area.
• Rotate the main PCB's sensor adjustment knob (VR4) to the point where the
HEAD UP indicator comes on.
b) Paper-Out Sensor
• Insert a non-black area of paper into the mechanism's sensor area.
• Rotate the main PCB's sensor adjustment knob (VR3) to the point where the
NO PAPER indicator comes on.
c) Transmissive Sensor
• Insert the backing portion of a label sheet into the mechanism's transmissive
sensor area. (Insert the backing part only, not the label itself.)
• Adjust the main PCB's coarse (VR1) and fine (VR2) adjustment knobs to the
point where the ERROR indicator comes on.
NOTE: When inserting paper, be sure to lower the head so that it is close to
its normal fixed position.
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