Epson FX-870/1170 - Manual (Page 114)

Principles of Operation
Figure 6-8. Push-pull Tractor Operation Using the
Rear Paper Entrance ........................................................ 6-10
Figure 6-9. Push-pull Tractor Operation Using the
Front Paper Entrance ....................................................... 6-11
Figure 6-10. Release Lever ....................................................................
6-12
Figure 6-11. Release Lever Setting Functions ...................................... 6-12
Figure 6-12. Paper Path for Friction Feeding Using the
Top Entrance ..................................................................... 6-13
Figure 6-13. Paper Path for Push Tractor Feeding Using the
Rear Entrance ..................................................................... 6-14
Figure 6-14. Paper Path for Pull Tractor Feeding Using the
Rear Entrance ................................................................... 6-14
Figure 6-15. Paper Path fbr Push-pull Tractor Feeding Using the
Rear Entrance ..................................................................... 6-15
Figure 6-16. Paper Path for Pu11 Tractor Feeding Using the
Bottom Entrance ................................................................. 6-15
Figure 6-17. Paper Path for Friction Feeding Using the
Front Entrance .................................................................. 6-16
Figure 6-18. Paper Path for Push Tractor Feeding Using the
Front Entrance .................................................................... 6-16
Figure 6-19. Paper Path for pull Tractor Feeding Using the
Front Entrance .................................................................. 6-17
Figure 6-20. Paper Path for Push-pull Tractor Feeding Using the
Front Entrance .................................................................... 6-17
Figure 6-21. Ribbon Advance Mechanism ............................................. 6-18
Figure 6-22. Power Supply Circuit Block Diagram ............................... 6-21
Figure 6-23. Control Circuit Block Diagram ......................................... 6-22
Figure 6-24. Data Flow ..........................................................................
6-23
Figure 6-25. Power On Reset Circuit .................................................... 6-25
Figure 6-26. Sensor Circuit Block Diagram .......................................... 6-26
Figure 6-27. Carriage Motor Drive Circuit ........................................... 6-27
Figure 6-28. Paper Feed Motor Drive Circuit ....................................... 6-28
Figure 6-29. Printhead Drive Circuit .................................................... 6-29
Figure 6-30. Parallel Interface Circuit .................................................. 6-29
Figure 6-31.
Control Circuit ................................................... 6-30
List of Tables
Table 6-1. Paper Feed Methods and Paper Entrances ........................ 6-5
Table 6-2. Ribbon Advance Gear Linkage ......................................... 6-18
Table 6-3. Power Supply Input Voltage and Fuse Rating................. 6-19
Table 6-4. Power Supply Output Voltages and Applications ............ 6-19
Table 6-5. Functions of Main Components of C094 MAIN ............... 6-24
6-ii
Epson FX-870/1170