Epson Stylus PHOTO 820 Service Manual page 127

EPSON Stylus PHOTO 810/820
Table 7-4. CN7 - PF Motor
Pin Signal Name I/O
1 PFA Out
2 PFB Out
3 PF-A Out
4 PF-B Out
Table 7-5. CN8 - Printhead
Pin Signal Name I/O
1 GND ---
2 COM ---
3 GND ---
4 VHV ---
5 GND ---
6 NCHG Out
7 GND ---
8 LAT Out
9 VDD3.3 ---
10 CSCK Out
11 COI In
12 CRST Out
13 THM In
14 CSDA In/Out
15 CVDD ---
Appendix
Function
Phase drive signal (A)
Phase drive signal (-A)
Phase drive signal (B)
Phase drive signal (-B)
Function
Ground
trapezoid waveform)
Head drive pulse (
Ground
-42 V power supply for nozzle selector
Ground
All nozzle fire selection pulse
Ground
Head data latch pulse output
Logic power supply (+3.3V)
Clock signal for EEPROM
I/C detection signal
Reset signal for EEPROM
Thermistor detection signal
CSIC data signal for EEPROM
Logic power supply (+3.3V) for EEPROM
Connector Summary
Table 7-6. CN9 - Printhead
Pin Signal Name I/O
1 SP Out
2 SI1 Out
3 SI2 Out
4 SI3 Out
5 SI4 Out
6 SI5 Out
7 SI6 Out
8 GND ---
9 CH Out
10 GND ---
11 SCK Out
12 GND ---
13 COM ---
14 GND ---
15 COM ---
Table 7-7. CN12 - CR Motor
Pin Signal Name I/O
1 CRA Out
2 CRB Out
3 CR-A Out
4 CR-B Out
Revision A
Function
Select signal for CH signal
Print data output (1)
Print data output (2)
Print data output (3)
Print data output (4)
Print data output (5)
Print data output (6)
Ground
Waveform selection signal for MS shot &
Variable shot
Ground
Serial Clock
Ground
Head drive pulse ( trapezoid waveform)
Ground
Head drive pulse ( trapezoid waveform)
Function
Phase drive signal (A)
Phase drive signal (-A)
Phase drive signal (B)
Phase drive signal (-B)
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