Brother TD-4000, Руководство по обслуживанию

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(4) Check the Tape Sensor (Tape sensor check)
Inspect whether the tape sensor works correctly.
1) Click the "Tape sensor check" button.
Figure 12. Check the tape sensor
2) Set the release coated paper (Cord: LP847301 Name: 80GS OJI ROLL
ASSY) to the sensor part of the machine so that the sandpapery surface is the
upper side.
3) Click the "Sensor white level check" button on the "Photo sensor level setting"
screen to acquire the sensor value. The acceptance range of the sensor value
is 200 to 234.
Figure 13. Check the photo sensor level
4) If the sensor value and the "OK" appear in the "White level" column, click the
"OK" button to finish the inspection.
If "NG" appears, click the "NG" button. In the case of "NG", make the setting
with the VR adjustment tool, then, perform the inspection again.
When the sensor value is in
the range of 200 to 234, the
judgement is "OK".