Epson LX-300 Service Manual page 77

Terminal printer
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Chapter 5 Troubleshooting
Table of Contents
5.1 OVERVIEW
5.2 UNIT LEVEL TROUBLESHOOTING
5.3 REPAIRING THE MAIN BOARD ASSEMBLY
5.4 REPAIRING THE PRINTER MECHANISM
Figure 5-1. Troubleshooting Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Figure 5-2. Printhead Connector Pin Alignment . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Figure 5-3. Flowchart Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Table 5-1. Printhead Coil Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Table 5-2. Printhead Driver Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Table 5-3. Motor Driver Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Table 5-4. Motor Coil Resistance Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Table 5-6. Sensor Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Table 5-6. Error State Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Table 5-7. Symptoms and Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Table 5-8. Repairing Problems in the Main Board Assembly. . . . . . . . . . . . . . 5-11
Table 5-9. Repairing the Printer Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
List of Figures
List of Tables
5-1
5-4
5-11
5-13

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