Epson Stylus Color 740 Service Manual

EPSON Stylus COLOR 440, 640, and 740 Appendix
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Table A-24. Printhead Connector (CN9)
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 SI6 Out Head data output (6)
8 SI5 Out Head data output (5)
9 SI4 Out Head data output (4)
10 SI3 Out Head data output (3)
11 SI2 Out Head data output (2)
12 SI1 Out Head data output (1)
13 GND — Ground
14 CLK Out Clock pulse for head data transfer
15 GND — Ground
16 NCHG Out Head all on pulse output
17 GND — Ground
18 VDD — Logic power supply (+5 V)
19 GND2 — Ground
20 GND2 — Ground
21 GND2 — Ground
22 GND2 — Ground
23 COM — Head drive power supply
24 COM — Head drive power supply
25 COM — Head drive power supply
26 COM — Head drive power supply
27 VHV — Head drive voltage control signal

Epson Stylus Color 740 Specifications

General

Brand	Epson
Model	Stylus Color 740
Category	Printer
Language	English