Sony UP-895 - Platen Motor Control

4-9
UP-895/(E)
Rear DIP switch (S300)
IC304-66, 69pin Function IC304-66, 69pin:SWDATA
SWSEL[3-0]
L (Default) H
0 1INTERRUPT ON OFF
1 2POST FEED ON OFF
2 3ASPECT 4:3 1:1
3 4MEMORY FRAME FIELD
4 5DIRECTION NORMAL REVERS
5 6SCAN1 WIDE1 WIDE 2
6 7SCAN2 _ NORMAL
7 8THRUE/EE THRUE EE
8 9AGC OFF ON
9 0RESERVED __
10 !-INPUT B&W COLOR
4-4-3. Platen Motor Control
A stepping motor for platen driving controls the forward and reverse rotation and rotation speed when a
system control (IC304) controls driving transistors (Q404 through Q407).
IC304 Signal line State
22pin PM1 L L H H
23pin PM2 H H L L
24pin PM3 L H H L
25pin PM4 H L L H
Forward rotation Reverse rotation