Platen Motor Control; Head Up And Down Control - Sony UP-960 Service Manual

Rear DIP SW Function
IC505 pin 39 INPUT
IC505 pin 40 SCAN
IC505 pin 41
IC505 pin 42 DIRECTION
IC505 pin 43 MEMORY
IC505 pin 45 ASPECT
IC505 pin 46 INTERRUPT
IC505 pin 4 MIRROR
IC505 pin 5 RESERVED

4-4-3. Platen Motor Control

IC505 pins 93, 94, 95 and 96 control correct rotation or reverse rotation and rotation speed of platen motor by operating
driving transistors Q405, 406, 407 and 408.
PM_A1 (IC505-93pin) L
PM_A2 (IC505-94pin) H
PM_B1 (IC505-95pin) L
PM_B2 (IC505-96pin) H
correct rotation

4-4-4. Head Up and Down Control

Up and down motor of the head is driven by IC402. Correct rotation and reverse rotation are possible. And their controls
are performed by IC505 pins 97 and 98. The head position is detected by optical type head position sensors (SE-441 board,
PH201 and 202) and read by IC505 pins 79 and 80.
Operation of Head Up and Down Motor
Head motor IC505-98pin
UP L
DOWN H
STOP H
Condition of Head Position Sensor
Head position sensor IC505-80pin
TOP L
HOME L
BOTTOM H
UP-960(UC)
UP-960CE(CE)
Operation
L : B&W
H : COLOR
L H
WIDE1
L L
L : NORMAL
H : REVERSE
L : FRAME
H : FIELD
L : 4 : 3
H : 1 : 1
L : ON
H : OFF
L : ON
H : OFF
L H H
H L L
H H L
L L H
reverse rotation
IC505-97pin Operation
H Head is lifted.
L Head is down.
H Stopped
IC505-79pin Condition
L Door lock is released.
H Wait (Usual)
L Print
L
NORMAL WIDE2
H
4-9