Minolta EP4000 - AE Sensor

Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
M-26
1156SBM1102A
11-2. AE Sensor
In the Auto Exposure Mode, the AE Sensor on AE Sensor Board PWB-H measures the
intensity of the light reflected off the original, by sampling the black/white ratio of a
210-mm-wide area of the original being measured. According to this measurement, the
Exposure Lamp voltage is automatically increased or decreased so that copies of
consistent quality are produced.
The output from the AE Sensor is applied to PWB-A which, in turn, varies the duty ratio
of the AVR Remote which varies the LA1 voltage accordingly.
Original Density (B/W Ratio) High Low
Intensity of Reflected Light Low High
PWB-H Output High Low
AVR Duty Increased Decreased
LA1 Voltage Increased Decreased
Control Signal ON OFF WIRING DIAGRAM
PWB-H
(AE Sensor)
PWB-A PJ3A-2 Pulse output 12-B
AVR Remote
Signal (PWB-J)
PWB-A PJ8A-13 L H 45-H