Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
M-42
1156SBM1305A
13-5. ATDC Sensor
The copier compares the toner-to-carrier ratio (T/C) of the developer in the Developer
Mixing Chamber detected by ATDC Sensor UN3 during a copy cycle with the reference
ratio (6%) and, if it finds a lower ratio than the reference, replenishes the supply of toner.
The standard output voltage of the ATDC Sensor for the reference T/C (6%) is 2.5V.
If the toner-to-carrier ratio becomes lower than 2.5% in a toner-empty condition, the
copier inhibits the initiation of a new copy cycle (this feature can be enabled or disabled
by a Tech. Rep. Choice mode). As soon as a ratio of 3% or more is recovered, the copier
permits the initiation of a new copy cycle.
If the Front Door is swung open and closed with a T/C ratio of less than 3%, the copier
initiates an Auxiliary Toner Replenishing sequence. (The toner-empty condition is
canceled as soon as a T/C ratio of 3.5% is reached and the copier completes the
Auxiliary Toner Replenishing sequence when the target level is reached.)
ATDC Sensor Automatic Adjustment
An automatic adjustment of the ATDC Sensor is made in the F8 or FF Test Mode
operation.
*When F8 (or FF) is Run after Starter Has Been Changed:
Following the execution of the starter setup mode, upon pressing the Start Key, the
copier CPU reads the output value of the ATDC Sensor and adjusts the ATDC
Sensor gain so that the output value becomes 2.5V.
NOTE: If an F8 (or FF) operation is run at a time when the starter has not been changed,
it can result in a wrong T/C reference value being set by the copier. Avoid casual
use of F8.
If the setting value has been cleared because of the RAM Board being replaced,
use the “Level History” function of the Tech. Rep. mode to return the “ATDC Ref.
Value” to the original value before the board was replaced.
Controlled Part
Control Signal
T/C Ratio
Standard
Output Voltage
WIRING DIA-
GRAM
UN3
PJ11A-2B
6.0(%)
2.5(V)
1-J
