Service manual
REV.-A
LIST OF FIGURES
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Figure 2-l. Howthe
Printhead
Works
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............................2-2
Figure 2-2. Carriage Operation . . . . . . . . . . . . . . . . . . .
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--~...f~~.~~..~.~~.-.----~~..-
2-3
Figure 2-3. Platen Gap Adjust Lever
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2-4
Figure 2-4. Friction Advance Operation UsingtheTop Paper Entrance ...........2-6
Figure 2-5. Push Tractor Operation Using the Rear Paper Entrance .................2-7
Figure 2-6. Push Tractor Operation Using the Front Paper Entrance ................2-8
Figure 2-7. Pull Tractor Operation Using the Bottom Paper Entrance ..............2-9
Figure 2-8. Push-Pull Tractor Operation Using the Rear Paper Entrance
........2-lO
Figure 2-9. Push-pull Tractor Operation Using the Front Paper Entrance ......2-11
Figure 2-10. Release Lever
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2-12
Figure 2-11. Release Lever Setting Function
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2-12
Figure 2-12. Paper Path for Friction Feeding Using the Top Entrance ............2-13
Figure 2-13. Paper Path for Push Tractor Feeding
Uskg
the Rear
EntTence............2-l4
Ftgure
2-14. Paper Path for Pull Tractor Feeding Using the Rear Entrance ....2-14
figure
2-15. Paper Path for push-pull Tractor Feeding Using the Rear Entrance .....2-15
Figure 2-16. Paper Path for Pull Tractor Feeding Using the Bottom Entrance .........2-15
Figure 2-17. Paper Path for Friction Feeding Using the Front Entrance
..........2-l6
Figure 2-18. Paper Path for Push Tractor
l%eding
Ueingthe
Front
En&ance
..........2-16
figure
2-19. Paper Path for Pull Tractor Feeding Using the Front Entrance ...2-17
Figure 2-20. Paper Path for Push-pull Tractor Feeding Using the Front
Entrence....2-l7
Figure 2-21. Ribbon Advance Mechanism
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2-18
Figure 2-22. Power Supply Circuit Block Diagram
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2-21
Figure 2-23. Control Circuit Block Diagram
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2-22
figure
2-24. Data flow
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2-23
figure
2-25. Power On Reset Circuit
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2-25
figure
2-26. Sensor Circuit Block Diagram
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2-26
Figure 2-27. Carriage Motor Drive Circuit
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2-27
Figure 2-28. Paper Feed Motor Drive Circuit
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2-28
Figure 2-29.
Printhead
Drive Circuit
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2-29
Figure 2-30. Parallel Interface Circuit
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2-29
Figure 2-31. E
2
PROM Control Circuit
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2-30
LIST OF TABLES
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Table 2-1. Paper Feed Methods and Paper Entrances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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2-5
Table 2-2. Ribbon Advance Gear Linkage
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2-18
Table 2-3. Power Supply Input Voltages and Fuse Ratings
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2-19
Table 2-4. Power Supply Output Voltages and Applications ...........................2-19
Table 2-5. Functions of Main Components of C094 MAIN
................................2-24
Table 2-6. Carriage Motor Drive Modes
.............................................................2.27
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