Exposure Lamp On/Off Control - Minolta Di 620 Manual

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
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
completion of the original detection filter check.
Exposure Lamp
Remote Signal
Exposure Lamp
(FL1)
Exposure Lamp
Remote Signal
Original Detecting
Solenoid (SL7)
CONTROL SIGNAL
PJ9IB-12A
ON
OFF
H
L
ON
OFF
Clamp
Adjustment
100% ON
(Exposure Lamp goes OFF) the
H
ON
L
Temp. Gain
Adjustment Adjustment
Original-Detection
M-22
, causing the
L
OFF WIRING DIAGRAM
C-18
H
Gain
Adjustment
Filter Check
1155T36MCC