Service manual

EPSON LX-300+ Revision A

Operating Principles Printer Mechanism (M-3M10) 44

2.2.1 Printhead

The table below shows the printhead specifications.

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 2-1. Printhead Specifications

Item Specification

Number of wires 9

Diameter of wire

0.29 mm

Wire configuration

See the figure below.

Note: The figure is seen from the back of the

head facing printing side.

Direct current coil resistance 33.3 ±3.3

Ω

(25°C)

Head drive method Rated voltage drive

Head drive voltage 35+2.1/-3.5 V

Peak current

• Normal: 0.75 A (Standard)

• Copy: 0.85 A (Standard)

1.0 A (Maximum)

Head drive frequency

• Normal: 1350Hz or less

• Copy: 1350Hz or less

Head life

• Black ribbon: 0.2 billion stroke/ wire or

• Color ribbon: 0.1 billion stroke/ wire or

Environmental condition

• Temperature: 5 to 55°C

• Humidity: 10 to 85%

Table 2-2. Buzzer Function -- Specification

Item Specification

Head voltage 35 +2.1 / -3.5 V

Drive frequency 2kHz, 1.5kHz