Minolta Di620, Manual, Page: 41 / 466

M-22
1155SBM0802A
8-2. Exposure Lamp ON/OFF Control
•
ON/OFF of the Exposure Lamp is controlled by the Exposure Lamp remote signal
from the Digital Image Processing Board.
•
ON/OFF timing varies according to whether the operation is generated by the Power
Switch or by the Start key, as follows.
=Operation when Power Switch is switched ON=
The timing operates in conjunction with automatic adjustment of clamp level and
gain, as described below.
•
Automatic adjustment of clamp level: Sets the black level when scanning an
image.
•
Automatic adjustment of gain: Sets the maximum white level.
These adjustments correct for fluctuations in output voltage caused by environmen-
tal changes and by performance disparities among components.
<Exposure Lamp ON Timing>
•
Power Switch turns ON, the Exposure Lamp remote signal goes , causing the
Exposure Lamp to come ON.
•
The Exposure Lamp intensity remains at 100% adjustment during that the Expo-
sure Lamp is ON, and is then readjusted.
<Exposure Lamp OFF Timing>
•
The Exposure Lamp remote signal goes (Exposure Lamp goes OFF) the
completion of the original detection filter check.
CONTROL SIGNAL ON OFF WIRING DIAGRAM
Exposure Lamp
Remote Signal
PJ9IB-12A C-18
L
H
L H
Exposure Lamp
(FL1)
Exposure Lamp
Remote Signal
Original Detecting
Solenoid (SL7)
Gain
Adjustment
Gain
Adjustment
Clamp
Adjustment
100% ON Original-Detection
Filter Check
Temp.
Adjustment
OFF
OFF
ON
ON
H
L
1155T36MCC