Epson SQ-1170 Service Manual page 39

Figure 2-35. Operational Sequence of Ink Mechanism and
Carriage Position .....................................................................2.22
Figure 2-36. Interlock Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Figure 2-37. Power Supply Circuit Block Diagram .................,.............2-28
Figure 2-38. Control Circuitry Block Diagram ........................................2.29
Figure 2-39. Reset Circuit Block Diagram ...............................................2-3 1
Detection Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Figure 3-40.
Paper Feed Motor Drive Circuit..........................................2.32
Figure 2-41.
Figure 2-42. Carriage Motor Drive Circuit ...............................................2.33
Figure 2-43. Printhead Drive Circuit..........................................................2.34
Figure 2-44. Charge/Discharge Circuit .....................................................2.35
Figure 2-45. Head Charge Condition..........................................................2.35
Figure 2-46. Head Discharge Condition ....................................................2.35
Figure 2-47. Timing for Discharge/Charge Pulse..................................2-36
Block Diagram of Pump Motor Drive Circuit.................2-36
Figure 2-48.
Block Diagram of TE Motor Drive Circuit.......................2-37
Figure 2-49.
Figure 2-50. Block Diagram of Timer Circuit/Backup Circuit ..........2-37
Figure 2-51. EEPROM Control Circuit .......................................................2.38
LIST OF TABLES
Paper Feeding Method and Paper Entrance.......................2-6
Table 2-1.
Rotational Direction and Operation of Each Part ............2 -15
Table 2-2.
Ink End/Ink Cartridge Signal ...................................................2.2O
Table 2-3.
Table 2-4. Ratings of Power Supply Board..............................................2.27
Voltage Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Table 2-5.
Table 2-6. Major Elements on C076 MAIN Board and
Their Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2-7. Carriage Motor Drive Modes ...................................................2.33