TEC B-443, Service Manual

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November, 99 All Rights Reserved 71
B-443 Bar Code Printer
Service Manual
D. Checking Black Line Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to
PIN2 of JP4. Load black line label on the printer.
1. When black line is detected by the black line sensor, the measured voltage should be 5 Vdc.
2. When black line is not detected by the black line sensor, the measured voltage should be 0
Vdc.
The black line sensor is normal if the checking complies with the two cases above. Or else, the
black line sensor is out of order.
E. Checking Peel Off Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to
PIN6 of JP3.
1. When label is detected by the peel off sensor, the measured voltage should be 0 Vdc.
2. When label is not detected by the peel off sensor, the measured voltage should be 5 Vdc.
The peel off sensor is normal if the checking complies with the two cases above. Or else, the
peel off sensor is out of order.