Specifications

2 - 14
Figure 2-9 Sample Pulse Width Control Circuit
* The compensation circuits for temperature and voltage are included.
* Adjust an oscillating frequency with VR to obtain the proper pulse width in 20 counts at
the normal temperature.
* A print pulse width is made by counting the above oscillator output with the CPU.
22k
Ω
Oscillator output
150k
Ω
VR
50k
Ω
22k
Ω
2SC
1740R
22k
Ω
1SS133
100k
Ω
820p
4069UB
Print pulse width
21
Oscillator output
345 1918 20
Head drive signal (Example: 20 -pulse count)
2.6.5 Initialization
Feed out the paper by one line and stop the print head at the home position after
turning on the power.
2.6.6 Paper Feeding
Paper is fed automatically upon input of a motor drive signal. After paper is fed, the
head must stop always at the home position.