Epson 680Pro Service Manual - Page 125

EPSON Stylus COLOR 680/777/777i, Revision B, Appendix, Connector Summary, Table 7-4., CN8 - Printhead

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EPSON Stylus COLOR 680/777/777i Table 7-4. CN8 - Printhead Pin Signal Name I/O Function 1 SI6 Out Print data output (6) 2 SI5 Out Print data output (5) 3 SI4 Out Print data output (4) 4 GND --- Ground 5 SCK Out Serial Clock 6 GND --- Ground 7 CH Out Waveform selection signal for MS shot & Variable shot 8 COC In Color I/C detection signal 9 RXD Out CSIC output 10 COB In Black I/C detection signal 11 TXD In CSIC output 12 VDD3.3 --- Logic power supply (+3.3V) 13 GND --- Ground 14 COM --- Head drive pulse (trapezoid waveform) 15 GND --- Ground 16 COM --- Head drive pulse (trapezoid waveform) 17 GND --- Ground Revision B Table 7-5. CN9 - Printhead Pin Signal Name I/O Function 1 COM --- Head drive pulse (trapezoid waveform) 2 GND --- Ground 3 COM --- Head drive pulse (trapezoid waveform) 4 GND --- Ground 5 VHV --- +42V power supply for nozzle selector 6 GND --- Ground 7 SEL In Command select 8 GND --- Ground 9 VDD --- Logic power supply (+5V) 10 LAT Out Head data latch pulse output 11 GND --- Ground 12 NCHG Out All nozzle fire selection pulse 13 THM In Thermistor detect signal 14 SI1 Out Print data output (1) 15 SI2 Out Print data output (2) 16 SI3 Out Print data output (3) 17 SP Out select signal for CH signal Appendix Connector Summary 125

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EPSON Stylus COLOR 680/777/777i
Revision B
Appendix
Connector Summary
125
Table 7-4.
CN8 - Printhead
Pin
Signal Name
I/O
Function
1
SI6
Out
Print data output (6)
2
SI5
Out
Print data output (5)
3
SI4
Out
Print data output (4)
4
GND
---
Ground
5
SCK
Out
Serial Clock
6
GND
---
Ground
7
CH
Out
Waveform selection signal for MS shot &
Variable shot
8
COC
In
Color I/C detection signal
9
RXD
Out
CSIC output
10
COB
In
Black I/C detection signal
11
TXD
In
CSIC output
12
VDD3.3
---
Logic power supply (+3.3V)
13
GND
---
Ground
14
COM
---
Head drive pulse (trapezoid waveform)
15
GND
---
Ground
16
COM
---
Head drive pulse (trapezoid waveform)
17
GND
---
Ground
Table 7-5. CN9 - Printhead
Pin
Signal Name
I/O
Function
1
COM
---
Head drive pulse (trapezoid waveform)
2
GND
---
Ground
3
COM
---
Head drive pulse (trapezoid waveform)
4
GND
---
Ground
5
VHV
---
+42V power supply for nozzle selector
6
GND
---
Ground
7
SEL
In
Command select
8
GND
---
Ground
9
VDD
---
Logic power supply (+5V)
10
LAT
Out
Head data latch pulse output
11
GND
---
Ground
12
NCHG
Out
All nozzle fire selection pulse
13
THM
In
Thermistor detect signal
14
SI1
Out
Print data output (1)
15
SI2
Out
Print data output (2)
16
SI3
Out
Print data output (3)
17
SP
Out
select signal for CH signal