This chapter describes the operating principles of the circuitry and printer mechanism.
1.
Block Diagram .....................................................................................................
2.
Interface ...............................................................................................................
2-1.
Interface Types ..................................................................................................... 13
2-1-1. RS232 interface ................................................................................................ 13
2-2.
2-2-1. Arrangement ..................................................................................................... 15
2-2-2. Thermal printhead ............................................................................................ 15
2-2-4. Head current control ........................................................................................ 18
2-3.
2-4.
Power-On Reset Circuit ....................................................................................... 21
2-5.
3.
Printer Mechanism ..............................................................................................
3-1.
Thermal Printhead ................................................................................................ 23
3-2.
Paper-Feed Mechanism ....................................................................................... 23
3-3.
Detectors ............................................................................................................... 24
3-4.
CHAPTER 2
2
11
13
23