Brother TD-2020 Service Manual page 93

(4) The adjustment screen appears once the inspection starts.
Figure 24. "Adjust photo sensors" window
If the cover of the machine is open at that time, the "Adjust photo sensors"
window is closed automatically and the inspection ends up as NG. "Cover check
error. Cover is open." appears in the "Results" field.
→ The inspection is inoperable if the cover of the machine is open at the beginning of the
inspection. Set the paper in the sensor read section and make sure to close the cover.
(5) When the adjustment is completed, the display below appears. Once "OK" appears in the
"Result" field, "Photo sensor adjust is OK. Please open cover." appears in the "Status"
field. Open the cover.
→ When "NG" appears in the "Result" field, the instruction to open the cover does not
appear in the "Status" field.
Press the [NG] button to finish the adjustment.
Note : "A/D value" and "Duty ratio" values can be NG even those values are close to OK
condition. Open the cover and change the position of the paper for reflection sensor
adjustment, and then try again. The result may become OK.
Figure 25. "Adjust reflecting sensor" OK
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