Chapter Theory of Operation | Star Micronics TSP400 instruction

CHAPTER 2 THEORY OF OPERATION

This chapter describes the operating principles of the circuitry and printer mechanism.				2

1.	Block Diagram		19
1.	Block Diagram		19
2. Main and Interface PCBs			21
	2-1.	Interface	21
	2-1-1. RS232C		21
	2-1-2. RS422A		22
	2-1-3. Parallel interface		23
	2-2.	Editing and Printing	24
	2-2-1. Editing		24
	2-2-2. Thermal head		24
	2-2-3. Head current control		25
	2-3.	Feed-Motor Drive Circuit	26
	2-4.	Power-On Reset Circuit	27
	2-5. +5V Line Voltage Detector Circuit		28
3.	Printer Mechanism		29
	3-1.	Thermal Head	29
	3-2.	Paper-Feed Mechanism	29
	3-3.	Detectors	30