Epson 440 - Manual (Page 165)

EPSON Stylus Color 440/640/740 Revision A
Chapter 7 Appendix 165
Table A-8. Connector CN8 (C256MAIN)
Pin Signal Name I/O Function
1 BCO In Black ink cartridge detect signal
2 CCO In Color ink cartridge detect signal
3 THM In Thermistor detect signal
4 GND --- Ground
5 LAT Out Head data latch pulse output
6 GND --- Ground
7 SI3 Out Head data output (3)
8 GND --- Ground
9 SI2 Out Head data output (2)
10 GND --- Ground
11 SI1 Out Head data output (1)
12 GND --- Ground
13 CLK Out Clock pulse for head data transfer
14 GND --- Ground
15 NCHG Out Head all on pulse output
16 GND --- Ground
17 VDD --- Logic power supply (+5V)
18 GND2 --- Ground
19 GND2 --- Ground
20 GND2 --- Ground
21 COM --- Head drive power supply
22 COM --- Head drive power supply
23 COM --- Head drive power supply
24 VHV --- Head drive voltage control signal
25 VHV --- Head drive voltage control signal
Table A-9. Connector CN10
Pin Signal Name I/O Function
1 +42V --- Mechanism drive power supply
2 +42V --- Mechanism drive power supply
3 GND --- Ground
4 GND --- Ground
5 PSC Out Power supply switch output signal
6 GND ---- Ground
7 GND --- Ground
8 +5V --- Logic power supply
Table A-10. Connector CN11
Pin Signal Name I/O Function
1 ASF In Sensor detect signal
2 GND --- Ground
3 ASFV --- Sensor power supply (+5V)