TSC TTP-225 Series - 2.2 Printer Overview; 2.2.1 Front View

TTP-225/323
Bar Code Printer Service Manual
6
4
Feed key and LED connector
JP28
Pin
Description
Voltage
1
Power
3.3V
2
LED green
LED light on: 1.1~1.4V
LED light off: 1.6~1.9V
3
LED red
LED light on: 1.4~1.7V
LED light off: 1.8~2.1V
4
Feed switch
0V: Push key
3.3V: Stand-by
5
GND
0V
5
Print head connector
JP55
6
Micro processor
7
Stepping motor connector
JP14
8
Black mark sensor connector
JP17
Pin
Description
Voltage
1
Power
3.3V
2
Gap sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 3.3V
3
Black mark sensor
emitter
Emitter on : 2.1~2.3V
Emitter off: 2.6~2.8V
4
Black mark sensor
receiver AD
0~3.3V
Gap emitter connector
JP71
Pin
Description
Voltage
1
Power
3.3V
2
Gap sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 3.3V
9
Head open sensor connector
JP16
Pin
Description
Voltage
1
Power
0V to 1.2V to 0V, 10ms square wave
continued
2
Head open
sensor receiver
Head close: 3.3V to under 1.0V to 3.3V,
10ms square wave continued
Head open: 3.3V continued
3
GND
0V
10
LCD connector (Option)
JP1