Epson Stylus Color 640 Service Manual page 167

EPSON Stylus Color 440/640/740
A.1.2.1 Connector Pin Assignment
Tables in this section provide connector pin assignments of the
C257MAIN, the main board equipped with Stylus Color 740.
Information contained in this section only applies to
Stylus Color 740.
If you need information on Stylus Color 440 and Stylus
Color 640, return to Section A.1.1.1.
Table A-11. Connector Summary of C257MAIN
Connector Function
CN1 Parallel I/F connector
CN2 Serial I/F connector
CN3 SUB I/F connector
CN4 To HP sensor
CN5 To PE sensor
CN6 To ASF sensor
CN7 To CR motor
CN8 To PF motor
CN9 To Printhead
CN10 To Power supply board
CN11 To Control panel
Table A-12. Connector CN4
Pin Signal Name I/O
1 HP
2 GND ---
3 HPV ---
Chapter 7 Appendix
(Stylus Color 740)
Table to refer to
Chapter 1/Table 1-10
Chapter 1/Table 1-16
Chapter 1/Table 1-18
Table A-12
Table A-13
Table A-14
Table A-15
Table A-16
Table A-17
Table A-18
Table A-19
Function
In Sensor detect signal
Ground
Sensor power supply(+5V)
Table A-13. Connector CN5
Pin Signal Name I/O
1 PE In
2 GND ---
3 PEV ---
Table A-14. Connector CN6
Pin Signal Name I/O
1 ASF In
2 GND ---
3 ASFV ---
Table A-15. Connector CN7
Pin Signal Name I/O
1 CRA Out
2 CR-A Out
3 CRB Out
4 CR-B Out
Table A-16. Connector CN8
Pin Signal Name I/O
1 PFA Out
2 PFB Out
3 PF-A Out
4 PF-B Out
Revision A
Function
Sensor detect signal
Ground
Sensor power supply (+5V)
Function
Sensor detect signal
Ground
Sensor power supply (+5V)
Function
Phase drive signal (A)
Phase drive signal (-A)
Phase drive signal (B)
Phase drive signal (-B)
Function
Phase drive signal (A)
Phase drive signal (B)
Phase drive signal (-A)
Phase drive signal (-B)
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