Minolta Di620, Manual, Page: 78 / 466

M-59
<Toner Replenishing Control by ATDC Sensor>
In general, the ATDC sensor detects the T/C ratio once every copy. The detected
value is compared against the target value (generally 4%, but may vary in accordance
with image stabilizing control). If the result indicates that resupply is required, the
Sub-hopper Toner Replenishing Motor is activated so as to supply the appropriate
amount. The amount of resupply depends on the comparison result, as follows.
* Quantity varies according to the size of the paper being copied. The table above
shows quantities for A4 paper.
If the detected T/C is more than 3% below the target level, the copier will suspend
copy operation and start replenishing of toner. Copying resumes when the T/C read-
ing gains 1 percentage point. But note that this feature does not operate if a Toner
Empty condition has been detected.
Toner Resupply Mode Conditions Resupply Quantity*
Large resupply quantity The T/C value detected by the ATDC sensor
is at least 0.5% below the target T/C value.
Approx. 192mg
Small resupply quantity The T/C value detected by the ATDC sensor
is below the target T/C value by less than
0.5%.
Approx. 96mg
Fixed resupply quantity The T/C value detected by the ATDC sensor
is above the target T/C value by less than
0.5%.
Approx. 16mg
No resupply The T/C value detected by the ATDC sensor
is above the target T/C value by at least 1%.
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