Printhead - Epson LX-300+II RTP Service Manual

EPSON LX-300+II/300+II RTP/1170II

2.2.1 Printhead

The table below shows the printhead specifications.
Table 2-2. Printhead Specifications
Item
Number of wires 9
Diameter of wire φ0.29 mm
See Figure 2-3 "Wire Configuration".
Wire configuration
Note: The figure is seen from the back of the head
facing printing side.
33.3 ±3.3 Ω (25°C)
Direct current coil resistance
Head drive method Rated voltage drive
Head drive voltage 35+2.1/-3.5 V
• Normal: 0.75 A (Standard)
Peak current
• Copy:
• Normal: 1350Hz or less
Head drive frequency
• Copy:
• Black ribbon: 0.2 billion strokes/ wire or more
Head life
• Color ribbon: 0.1 billion strokes/ wire or more
• Temperature: 5 to 55°C
Environmental condition
• Humidity:
Operating Principles
Specification
0.85 A (Standard)
1.0 A (Maximum)
1350Hz or less
10 to 85%
Printer Mechanism
Figure 2-3. Wire Configuration
2.2.1.1 Buzzer Function
This printhead also works as a buzzer. The table below shows buzzer specification.
Table 2-3. Buzzer Function -- Specification
Item
Head voltage
Drive frequency
Revision D
Specification
35 +2.1 / -3.5 V
2kHz, 1.5kHz
45