List of Figures
Figure 2-1. Printhead Operation . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . 2-1
Figure 2-2. Carriage MovementMechanism . .. . . . . . . . . . . . . . .. . . . . . . . . . . 2-2
Figure 2-3. Platen Gap AdjustLever . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . 2-3
Figure 2-4. Release Switch. . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . 2-4
Figure 2-5. Friction Advance Operation Usingthe Top Entrance .. . . . . . . . . . . 2-5
Figure 2-6. Push TractorOperation Using the Rear Paper Entrance. . . . . . . . . 2-6
Figure 2-7. Push TractorOperation Using the Front Paper Entrance. . . .. . . . . 2-7
Figure 2-8. Pull Tractor Operation Usingthe Bottom Paper Entrance . . . . . . . . 2-8
Figure 2-9. Push- PullTractor Operation Using the Rear Paper Entrance. . . . . 2-9
Figure 2-10. Push- Pull TractorOperation Using the Front Paper Entrance . . 2-10
Figure 2-11. Paper Pathand Detector PE Sensor Location . .. . . . . . . . . . . . . 2-11
Figure 2-12. Friction FeedingUsing the Top Entrance . . . . . .. . . . . . . . . . . . . 2-11
Figure 2-13. Push Tractor FeedingUsing the Rear Entrance. . . . . . . . . .. . . . 2-12
Figure 2-14. Pull Tractor FeedingUsing the Rear Entrance. . . . . . . . . . . . . .. 2-12
Figure 2-15. Push-Pull Tractor Feeding Usingthe Rear Entrance . . . . . .. . . . 2-13
Figure 2-16. Pull Tractor FeedingUsing the Bottom Entrance . . .. . . . . . . . . . 2-13
Figure 2-17. Friction FeedingUsing the Front Entrance . .. . . . . . . . . . . . . . .. 2-14
Figure 2-18. Push Tractor FeedingUsing the Front Entrance . . . . . . . . . . . . . 2-14
Figure 2-19. Pull Tractor FeedingUsing the Front Entrance . . . . . . . . . . . . .. 2-15
Figure 2-20. Push-Pull Tractor Feeding Usingthe Front Entrance. . . . . . . . . . 2-15
Figure 2-21. Ribbon Advance Mechanism . . . . . .. . . . . . . . . . . . . . .. . . . . . . 2-16
Figure 2-22. Power SupplyCircuit Block Diagram . . .. . . . . . . . . . . .. . . . . . . 2-17
Figure 2-23 PowerSwitch Circuit .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . 2-18
Figure 2-24. Over VoltageProtection Circuit . . . .. . . . . . . . . . . . . . .. . . . . . . 2-18
Figure 2-25. +35V LineConstant Voltage Control Circuit. . . . . . . . . . . . .. . . . 2-19
Figure 2-26. +35V LineOverload Detector Circuit . . . . . . . . . . . . . . .. . . . . . . 2-19
Figure 2-27. +35V LineOver Current Protection Circuit . . . . .. . . . . . . . . . . . . 2-20
Figure 2-28. +5V Line OverCurrent Protection Circuit . . .. . . . . . . . . . . . . . .. 2-20
Figure 2-29. +5V Constant Voltage ControlCircuit . . .. . . . . . . . . . . . . . .. . . . 2-21
Figure 2-30. Control Circuit Block Diagram. . .. . . . . . . . . . . . . . .. . . . . . . . . . 2-22
Figure 2-31. Data Flow . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . 2-23
Figure 2-32. Reset Circuit. . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . 2-24
Figure 2-33. Reset SignalOutput Timing . . . . . . . . . . . . .. . . . . . . . . . . . . . .. 2-24
Figure 2-34. Printhead Drive Circuit . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . 2-24
Figure 2-35. CR Drive Circuit . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . 2-25
Figure 2-36. PF MotorDrive Circuit. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . 2-26
Figure 2-37. EEPROM Control Circuit.. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. 2-26
Figure 2-38. Sensor Circuit. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . 2-27
List of Tables
Table 2-1. CR Motor AssemblySpecifications . . . . . . . . . . . . . . .. . . . . . . . . . . 2-2
Table 2-2. Platen Gap andPrint Speed . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . 2-3
Table 2-3. Release LeverPosition . . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . 2-4
Table 2-4. Ribbon AdvanceGear Linkage . . .. . . . . . . . . . . .. . . . . . . . . . . . . 2-16
Table 2-5. Power Supply Board . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . 2-17
Table 2-6. Power Supply Output Voltageand Applications . .. . . . . . . . . . . . . 2-17
Table 2-7. Functions of the MainIC . .. . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. 2-23
Table 2-8. CR Motor Drive Mode . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . 2-25