Epson FX-870/1170 - Manual (Page 53)

Troubleshooting
Chapter 3
Troubleshooting
Test Points ................................................................................................ 3-1
Error Codes ............................................................................................... 3-5
Problem Isolation ..................................................................................... 3-6
Serial Communications Errors ........................................................ 3-7
Connector Locations ............................................................................... 3-18
Sensor Locations ..................................................................................... 3-19
Hex Quick Reference Table for ESC/P Commands ............................... 3-21
Hex Quick Reference Table for IBM Commands ................................... 3-23
List of Figures
Figure 3-1. Printhead Resistance .......................................................... 3-3
Figure 3-2. Connector Locations ..........................................................
3-18
Figure 3-3. Release Sensor ................................................................... 3-19
Figure 3-4. Home Position Sensor ....................................................... 3-19
Figure 3-5. Platen Gap Sensor .............................................................
3-20
Figure 3-6. Front and Rear PE Sensors .............................................. 3-20
List of Tables
Table 3-1. Power Supply Test Points ................................................... 3-1
Table 3-2. Sensor Test Points ............................................................... 3-2
Table 3-3. Motor Test Points and Coil Resistance ............................... 3-2
Table 3-4. Printhead Test Points and Coil Resistance ....................... .3-3
Table 3-5. Printhead Driver Test Points .............................................. 3-4
Table 3-6. Carriage and Paper Feed Motor Driver Test Points ......... .3-4
Table 3-7. Error Codes .......................................................................... 3-5
Table 3-8. Symptoms and Flowchart References ................................. 3-6
Table 3-9. Identifying Serial Communications Errors ....................... 3-7
Table 3-10. Hex Codes for ESC/P Commands ..................................... 3-21
Table 3-11. Hex Codes for IBM Commands ......................................... 3-23
Epson FX-870/1170 3-i