Table of Contents
Advertisement
f.
ADF copy operation
ADF
Scanner
break
HP
PS7
PS5
Original
read
position
g.
Platen copy operation
ADF
Scanner
brake
HP
PS7
PS5
Second white correction
First white correction
AE scan
Original area justment
Exposure scan
Home position search
2. Signals
a.
PRCB input signals
(1) PS5 (PS5 to SCDB to PRCB)
Scanner home position detection signal.
The reference position for the home position of
the exposure unit is detected.
[L]: The exposure unit is detected.
[H]: The exposure unit is not detected.
(2) PS6 (PS6 to SCDB to PRCB)
Original home position detection signal.
In the platen mode, the reference position for the
original's leading edge is detected.
[L]: The exposure unit is detected.
[H]: The exposure unit is not detected.
(3) PS7 (PS7 to SCDB to PRCB)
ADF brake detection signal.
In the DF mode, the exposure reference position
is detected.
[L]: The exposure unit is detected.
[H]: The exposure unit is not detected.
Second white correction
First white correction
Scanner
return
Original HP
PS6
2-C-3
b.
PRCB output signals
(1) M13 CLK (PRCB to SCDB)
Clock signal for M13.
(2) M13 F/R (PRCB to SCDB)
M13 rotational direction switchover signal.
[L]: The exposure unit is moved toward the paper
exit side.
[H]: The exposure unit is moved toward the paper
feed side.
(3) M13 CSEL (PRCB to SCDB)
M13 excitation switchover signal.
[L]: 2-/3-phase excitation
[H]: W2-/3-phase excitation
(4) M13 V0 to V2 (PRCB to SCDB)
M13 excitation current switchover signal.
c.
SCDB output signals
(1) M13 DRIVE, U, V, W (SCDB to M13)
M13 drive control signals.
These signals are used to control rotation of
M13. By supplying and stopping clock pulses,
the motor is turned ON/OFF and the rotational
direction is switched.
READ SECTION
Advertisement
Table of Contents
