Star Micronics TSP200 technical manual Chapter Principles of Operation

CHAPTER 2

PRINCIPLES OF OPERATION

This chapter describes the operating principles of the circuitry and printer mechanism.				2
1.	.....................................................................................................Block Diagram		11
2.	Interface		13
	2-1.	Interface Types	13
	2-1-1. RS232 interface		13
	2-1-2. Parallel interface		14
	2-2. Data Arrangement and Printing		15
	2-2-1. Arrangement		15
	2-2-2. Thermal printhead		15
	2-2-3. Head current control		16
	2-2-4. Head current control		18
	2-2-5. Head burnout protection		18
	2-3.	Feed-Motor Drive Circuit	19
	2-4.	Power-On Reset Circuit	21
	2-5. +5V Line Voltage Detector Circuit		22
3.	Printer Mechanism		23
	3-1.	Thermal Printhead	23
	3-2.	Paper-Feed Mechanism	23
	3-3.	Detectors	24
	3-4.	Auto-Cutter Drive circuit (on TSP242-24/120/230 only)	25