Sony UP-980 - 4-5-5. Paper Cutter Control; 4-5-6. Watch of Paper Sensor; 4-5-7. Watch of the Head Temperature Sensor; 4-5-8. Head Fan Motor (for Head Cooling) Control

4-5-5. Paper Cutter Control
Paper cutter motor is driven by IC401. Correction rotation and reverse rotation are possible. And their control is
performed by IC505 pins 90 and 91. Cutter position is detected by cutter position sensor (including cutter unit) of switch
type and read by ICS05 pins 88 and 89.
Operation of Cutter Motor
Cutter motor 1C505-91 pin 1C505-90pin Operation
CUT L H Cut
RETURN H L Returned
STOP H H Stopped
Condition of Cutter Position Sensor
Cutter position sensor 1C505-89pin 1C505-88pin Condition
CUT END L H Cut is end.
HOME H L Wait (Usual)
4-5-6. Watch of Paper Sensor
Whether the print paper is set in the unit correctly or not, it is detected by three pairs of optical type paper sensors (SE-485
board PH502, SE-443 board PH501 and PTC-98 board PH301) and read by IC50S5 pins 81, 82 and 83.
Condition of Paper Sensor (— : L or H)
IC505-83pin 1C505-82pin 1C505-81pin Condition
H = — No paper
_ L H No paper
_ L There is a paper.
H _— There is a paper.
4-5-7. Watch of the Head Temperature Sensor
The resistor value change of thermistor included in the thermal head is converted to the voltage by IC404. The result is
fetched to IC505 pin 78 and is converted A/D. Cause of this A/D converted digital value, the density (Gamma) adjustment,
fan motor control for head cooling and head in cooling judge by IC601 (Gate array) are performed.
4-5-8. Head Fan Motor (for Head Cooling) Control
Head fan motor is operated by controlling the driving transistor Q409 using IC505 pin 2. When the head temperature is
over heat or during print mode, head fan motor is turned ON.
Operation of Head Fan Motor
1C505-2pin Operation
L OFF
H ON
4-12 UP-980(UC)
UP-980CE(c E)