Service manual

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EPSON LQ-300+ Revision C

Troubleshooting Troubleshooting 50

3.2.4.1 Printhead Check

By measuring the direct current resistance of the printhead coil, you can check if it is

all right.

Figure 3-2. Head Coil Pin No.

Table 3-10. Printhead Coil Resistance

Item Operation Specification

Printhead

1. Set the multimeter to the resistance measuring range.

2. Connect the one side of the probe to C.

3. Connect the other side of the probe to corresponding

head pin No.

33.3 ± 3.3Ω

(at 25°C/phase)

Looked From Point A