Epson STYLUS 4001968 Service Manual page 26

Functional Block Diagram of the Printer Mechanism . ...........2-1
Figure 2-1.
Structure of Printhead . . . . . . . . . . . . . . . . . . . . . ...............2-2
Figure 2-2.
Principles ofthe Printing Operation . . . . . . . . . . . . . . . . . . . . . ....2-3
Figure 2-3.
Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Figure 2-4.
Platen Gap Adjust Lever . . . . . . . . . . . .......................2-4
Figure 2-5.
Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . .............2-5
Figure 2-6.
Diagram ofthelnkSystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2-6
Figure 2-7.
Pump Mechanism Block . . . . . . . . . . . . . . . . . . . . . .............2-7
Figure 2-8.
Figure 2-9. Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .........2-8
Figure 2-10 Cap Mechanism . . . . . . . . . . . . . . . . . . . . . ..................2-9
Block Diagram of the Electrical Circuities . . . . . . . . . . . . . . .....2-10
Figure 2-11 ~D•Œ
Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . .....2-11
Figure 2-12
Main Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . .....2-12
Figure 2-13
ResetCircuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . .....2-13
Figure 2-14
Figure 2-15 Sensor Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .....2-13
Ink End Detection Sequence . . . . . . . . . . . . . . . . . . . . . . . .....2-14
Figure 2-16.
Figure 2-17. Carriage Motor Drive Circuit Block Diagram . . . . . . . . . . . . .....2-15
Paper Feed MotorDriveCircuit Block Diagram . . . . . . . . . .....2-16
Figure 2-18.
Figure 2-19.
Relation oflnkSystem Operation and Carriage Position . . .....2-18
Figure 2-20.
Carriage Drive Motor Specification . .........................2-4
Table 2-1.
P l a t e n
Table 2-2.
Paper Feed Drive Motor Specification . .......................2-5
Table 2-3.
Pump Mechanism Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Table 2-4.
Table 2-5. DC Voltage Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ..2-10
Carriage Motor Drive Modes . . . . . . . . . . . . . . . . . . . . . . . . . ....-2-15
Table 2-6.
Paper Feed Motor Drive Modes . . . . . . . . . . . . . . . . . . . . . . . .....2-16
Table 2-7.
2-ii
List of Figures
List of Tables
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Gap Adjust Lever Position . ..........................2-4