Exposure Lamp; Ae Sensor - Minolta EP3010 Manual

1173SBM1202A

12-2. AE Sensor

In the Auto Exposure Mode, the AE Sensor on AE Sensor Board 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 volt-
age is automatically increased or decreased so that copies of consistent quality are pro-
duced.
The output from the AE Sensor is applied to the Master Board which, in turn, varies the
duty ratio of the AVR Remote which varies the Exposure Lamp voltage accordingly.
Original Density (B/W Ratio)
Intensity of Reflected Light
AE Sensor Board Output
AVR Duty
Exposure Lamp Voltage
PWB-H
PWB-A PJ5A-2
(AE Sensor)
AVR Remote
PWB-A PJ36A-4
Signal (LA1)
High
Low
High
Increased
Increased
Control Signal
M-27
Low
High
Low
Decreased
Decreased
ON OFF WIRING DIAGRAM
Pulse output
L H
8-F
8-C