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Operation of Control Parts
CL-S6621 2-20
(3) Operation panel (SA, Opepane PCB)
Used to indicate the operating status of the printer and to set specifications. It consists of 4
keys and 4 LEDs.
(4) Thermal print head (SA, Head)
Makes printing on paper. The number of thermal elements (dots) is as follows. The thermal
print head includes the print head driver circuit.
•1344 dots
(5) Sensors
The following 9 sensors are used in the printer:
Sensor name Description
Head Up Switch
(SA, Head Up Switch)
A mechanical lever switch.
Transparent Sensor A photo sensor using a phototransistor. (On the “SA
TRA Sen PCB”.)
Reflective Sensor A photo sensor consisting of 2 LEDs and 1
phototransistor. (On the “SA Ref Sen PCB”.)
Ribbon Sensor F Photo sensors (2 pcs.) using photointerrupters.
(Located on the “SA, Ribbon Sensor” on the front side.)
Ribbon Sensor R Photo sensors (2 pcs.) using photointerrupters.
(Located on the “SA, Ribbon Sensor” on the rear side.)
Thermal Head Temperature
Sensor
A thermistor incorporated in the “SA, Head”.
PF Motor Temperature Sensor A thermistor attached to the “SA PF Motor”.
Ribbon Motor Temperature Sensor A thermistor attached to the “SA Ribbon Motor F” (the
front side of ribbon motor).
Paper Near End Sensor A photo sensor using a photointerrupter. (On the “SA
PNE Sensor”.)
(6) Motors
Three motors are used.
- The “SA PF Motor” is a stepping motor to feed media.
- The “SA Ribbon Motor F” and “SA Ribbon Motor R” are stepping motors to take up and
supply ribbon, respectively.
(7) SA, Ribbon PCB
Controls the operations of the “Unit, Ribbon”.
(a) Stepping motor driver
This is a circuit to drive the “SA Ribbon Motor F” on the front side for taking up ribbon and
the “SA Ribbon Motor R” on the rear side for supplying ribbon. Both are stepping motors.