Minolta Di 620 Manual page 78

<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.
Toner Resupply Mode
Large resupply quantity The T/C value detected by the ATDC sensor
Small resupply quantity The T/C value detected by the ATDC sensor
Fixed resupply quantity
No resupply
* 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.
Conditions
is at least 0.5% below the target T/C value.
is below the target T/C value by less than
0.5%.
The T/C value detected by the ATDC sensor
is above the target T/C value by less than
0.5%.
The T/C value detected by the ATDC sensor
is above the target T/C value by at least 1%.
M-59
Resupply Quantity*
Approx. 192mg
Approx. 96mg
Approx. 16mg
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