Ae Sensor - Minolta EPI 054 User Manual

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL
98.04.24
1174SBM0902A
9-2.

AE Sensor

In the Auto Exposure Mode, the AE Sensor on the AE Sensor Board measures the intensity
of the light reflected off the original, which results in the black/white ratio of a 210-mm-wide
area from the reference position of the original being measured. According to this measure-
ment, 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 the Master Board which, in turn, varies the
duty ratio of the AVR Remote from it to vary accordingly the Exposure Lamp voltage.
Original Density (B/W Ratio)
Intensity of Reflected Light
AE Sensor Board Output
AVR Duty
Exposure Lamp Voltage
PWB-H
PWB-A PJ9A-3
(AE Sensor)
AVR Remote
PWB-A PJ14A-3
Signal (LA1)
High
Low
High
Increased
Increased
Control Signal ON
L
L
M-22
Low
High
Low
Decreased
Decreased
OFF WIRING DIAGRAM
H 4-F
H 6-D