Minolta CF910 Service Manual page 54

<When Making Two Mono-Color Copies>
Scan Start Timing Signal
(PRE-TRIG)
Lamp ON Signal
Image Request Signal
Sub-Scanning Area Signal
Scanner Motor
<Speed Control>
• When the time of one period (T) of the reference clock of Motor Drive Board PWB-G is
varied, it correspondingly varies the period of the M1 drive pulse, thereby accelerating or
decelerating M1.
Reference
Clock
Accelerating
Decelerating
<Scanner Home/Standby Position Detection>
Power Switch S1 is turned ON, a misfeed or malfunction is reset, or the Front Door is opened and
closed.
Scanner Home Position Sensor PC1
Unblocked (H)
M1 stops when the Scanner moves to the right a distance equivalent to 34 pulses = 1,696 mm after
PC1 has been blocked (L).
Start Key ON
H
L
H
L
(LMPON)
0.5sec
H
L
(I-REQ)
H
L
(VD)
Scan
Stop
(M1)
Return
0.5sec
T1
Blocked (L)
M1 turns backward causing the Scanner to move to the left.
M1 stops when PC1 is unblocked (H).
M1 turns forward causing the Scanner to move to the right.
M-37
0.5sec
1st Copy
T2 T3
2nd Copy
1144M04TCB
T4 T5
1144M36TCA