Konica Minolta 7155 - Exposure Control; Original Read Control

SCANNER SECTION
2-C-5
2 UNIT EXPLANATION
[4] Exposure Control
L1 (exposure lamp) is driven by L1 INVB (L1
inverter) and is controlled by PRCB (printer con-
trol board) via SCDB (scanner drive board).
1. Operation
L1 (exposure lamp) is a xenon lamp driven by the
inverter circuit. The xenon lamp can emit a con-
stant light intensity and generates less heat than
other lamps, so it does not require the light inten-
sity control circuit that has been used in the exist-
ing machines, requiring no thermal protector
circuit. However, since L1 is held lit when the
exposure unit is stationary in the ADF mode,
FM9 (scanner cooling) is installed in the read
section.
2. Signals
a. Output signals
(1) EXP_CONT (PRCB to SCDB)
L1 (exposure lamp) ON/OFF control signal
[L]: L1 ON
[H]:L1 OFF
(2) CONT (SCDB to L1 INVB)
L1 (exposure lamp) ON/OFF control signal
[L]: L1 ON
[H]:L1 OFF
[5] Original Read Control
In the case of the 7155/7165
L1 INVB
SCDB
24V
CONT
LAMP.PG
L1
PRCB
EXP CONT
DCPS
24V1
5V2
S.GND
P.GND
L.PG
5V2
S.GND
ICB
ADB
CCD
12V2
12V2
GND
APR
ADRST
PDWN
GND
TCK
/TCK
GND
RCK
/RCK
GND
LCLK1
/LCLK1
GND
SCLK
/SEN
SDI
SDO
TG
CLAMP
GND
BCLAMP
GND
D0
/D0
GND
D1
/D1
GND
D2
/D2
GND
LCLK0
/LCLK0
GND
5V2
5V2
GND