Operating Principles - Epson LQ-670 Service Manual

Chapter 2 Operating Principles
Print Method
Number of pin wires
Wire diameter
Print head life
Weight
Coil direct current resistance
Response Frequency
Drive Voltage
Drive Condition
Environmental condition
Print drive method
2-2
Table 2-1. Print Head Specification
Category Specification
Impact dot matrix
24-pin (12X2)
0.20mm
200 million strokes/wire
115 12g
39.3 2.7 (at 25 C)
Normal Mode : 1500Hz
Buzzer : 1.5KHz
42 3V
Normal Drive
Thick paper (using multipart or thick papers)
Buzzer function
Temperature : 5 55 C
Humidity : 10 85%
Constant voltage drive method
Rev. A