Konica Minolta 7155 - Page 68

SCANNER SECTION
2-C-10
2 UNIT EXPLANATION
In the case of the 7255/7272
The CCD sensor detects the image density on an
original during AE scanning to select the opti-
mum copy gamma correction curve.
AE processing is controlled by the ICB (image
control board).
1. Operation
a. AE detection
(1) Platen mode
The image density on an original is measured
during AE scanning preceding the exposure
scanning that is carried out after depression of
the START button.
<AE sampling area>
1) Normal copy
10 mm inside the perimeter of the original
detected by APS. (7155/7165)
10 mm inside the perimeter of the scanned area
within 30mm from the leading edge of an original.
(7255/7272)
2) Non-image area erasure mode
Entire original area detected during pre-scan-
ning.
(2) ADF mode
The image at the leading edge of the original is
read when the PRINT button is pressed.
The read data is used to measure the image den-
sity on the original.
<AE sampling area>
1) Main scanning direction
10 mm area inside the original detected by APS
2) Sub-scanning direction
2-to-4 mm area from the leading edge of the orig-
inal.
ICB
ADB
CCD
GND
TG
TG_OUT
CLAMP
A_CLAMP
PRD_KEEP
GND
+LCLK
-LCLK
GND
-RCLK
+RCLK
GND
GND
+TCK
-TCK
GND
GND
SCLK
/SEN
SDI
SDO
GND
-AD_D0
+AD_D0
GND
-AD_D1
+AD_D1
GND
-AD_D2
+AD_D2
GND
-LVDSCLKO
+LVDSCLKO
GND
ADRST
APR
LVDS_PDWN
GND
+5V
+5V
+5V
+5V
+5V
+5V
GND
+12V
+12V
+12V
GND
7272ma2018
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MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
2-C-8 REPLACEMENT
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