Epson Stylus Color 640 Service Manual page 168

EPSON Stylus Color 440/640/740
Table A-17. Connector CN9
Pin Signal Name I/O
1 BCO In
2 CCO In
3 THM In
4 GND ---
5 LAT Out
6 GND ---
7 SI6 Out
8 SI5 Out
9 SI4 Out
10 SI3 Out
11 SI2 Out
12 SI1 Out
13 GND ---
14 CLK Out
15 GND ---
16 NCHG Out
17 GND ---
18 VDD ---
19 GND2 ---
20 GND2 ---
21 GND2 ---
22 GND2 ---
23 COM ---
24 COM ---
25 COM ---
26 COM ---
27 VHV ---
Chapter 7 Appendix
Function
Black ink cartridge detect signal
Color ink cartridge detect signal
Thermistor detect signal
Ground
Head data latch pulse output
Ground
Head data output (6)
Head data output (5)
Head data output (4)
Head data output (3)
Head data output (2)
Head data output (1)
Ground
Clock pulse for head data transfer
Ground
Head all on pulse output
Ground
Logic power supply (+5V)
Ground
Ground
Ground
Ground
Head drive power supply
Head drive power supply
Head drive power supply
Head drive power supply
Head drive voltage control signal
Table A-18. Connector CN10
Pin Signal Name I/O
1 +42V ---
2 +42V ---
3 GND ---
4 GND ---
5 PSC Out
6 GND ----
7 GND ---
8 +5V ---
Table A-19. Connector CN11
Pin Signal Name I/O
1 SW2 In
2 SW0 In
3 PSC In
4 SW1 In
5 LED3 Out
6 +5V ----
7 +5V ----
8 LED2 Out
9 GND ----
10 LED1 Out
11 GND ----
12 LED0 Out
Revision A
Function
Mechanism drive power supply
Mechanism drive power supply
Ground
Ground
Power supply switch output signal
Ground
Ground
Logic power supply
Function
Panel switch on/off (2)
Panel switch on/off (0)
Power on/off switch
Panel switch input (1)
LED drive signal (3)
Logic power supply
Logic power supply
LED drive signal (2)
Ground
LED drive signal (1)
Ground
LED drive signal (0)
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