Printhead; Buzzer Function - Epson LX-300 Service Manual

EPSON LX-300+

2.2.1 Printhead

The table below shows the printhead specifications.
Table 2-1. Printhead Specifications
Item
Number of wires 9
φ0.29 mm
Diameter of wire
See the figure below.
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:
Peak current
• Copy:
• Normal:
Head drive frequency
• Copy:
• Black ribbon: 0.2 billion stroke/ wire or
Head life
• Color ribbon: 0.1 billion stroke/ wire or
• Temperature: 5 to 55°C
Environmental condition
• Humidity:
Operating Principles
Specification
0.75 A (Standard)
0.85 A (Standard)
1.0 A (Maximum)
1350Hz or less
1350Hz or less
more
more
10 to 85%
Printer Mechanism (M-3M10)
Figure 2-3. Wire Configuration

2.2.1.1 Buzzer Function

This printhead also works as a buzzer. The table below is buzzer specification.
Table 2-2. Buzzer Function -- Specification
Item
Head voltage
Drive frequency
Revision A
Specification
35 +2.1 / -3.5 V
2kHz, 1.5kHz
44