Ae Control - Minolta Di551 Service Manual

2. Signals
a. Input signals
(1) APS_TIM (PS51 to SCDB)
ADF open/close detection signal
[L]: ADF is closed.
[H]: ADF is open.
(2) APS.1/APS.1_SIG (PS63 to SCDB to ICB)
Paper size detection signal
[L]: Paper is detected.
[H]: Paper is not detected.
(3) APS.2/APS.2_SIG (PS64 to SCDB to ICB)
Paper size detection signal
[L]: Paper is detected.
[H]: Paper is not detected.
(4) APS3/APS.3_SIG (PS65 to SCDB to ICB)
Paper size detection signal
[L]: Paper is detected.
[H]: Paper is not detected.
(5) SIZE_PS_L (PS309 to SCDB to ICB)
Paper size detection signal
[L]: Paper is detected.
[H]: Paper is not detected.
(6) SIZE_PS_S (PS310 to SCDB to ICB)
Paper size detection signal
[L]: Paper is detected.
[H]: Paper is not detected.
(7) SIZE_ANA (PS301 to SCDB to ICB)
Paper size detection signal
[L]: Paper is detected.
[H]: Paper is not detected.
(8) COVER_SIG (SCDB to ICB)
Same as APS TIM signal.
(9) APS_TIMING (SCDB to PRCB)
Same as APS TIM signal.
b. Output signals
(1) APS_CONT
This signal controls ON/OFF states of APS_5V
power for driving PS63, PS64, and PS65 (APS1
to APS3).
[L]: APS_5 V OFF
[H]: APS_5 V ON

[7] AE Control

ICB
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.
2) Non-image area erasure mode
Entire original area detected during pre-scan-
ning.
2-C-7
SCANNER SECTION
12V2
12V2
GND
APR
ADRST
PDWN
GND
TCK
/TCK
GND
RCK
/RCK
GND
LCLK1
/LCLK1
GND
SCLK
/SEN
CCD
SDI
SDO
ADB
TG
CLAMP
GND
BCLAMP
GND
D0
/D0
GND
D1
/D1
GND
D2
/D2
GND
LCLK0
/LCLK0
GND
5V2
5V2
GND