Canon S820MG, Service Manual

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S750
Part 4: Appendix
1.3 Print Head
Figure 4-9 Print Head
Pin No Signal IN/OUT Function
1,2 A_GND … GND (for black heater driving voltage)
3 H_D2 IN Cyan even array nozzle data signal
4 H_D6 IN Yellow even array nozzle data signal
5, 14, 22
6, 7, 8 B_GND … GND (for color heater driving voltage)
9 DIK0 OUT Head temperature sensor's (diode) cathode side (black)
10 SUBH0 IN Black secondary heater driving voltage
11 H_D4 IN Magenta even array nozzle data signal
12 H_ENB1 IN Color nozzle heat enable signal (Even/odd array odd block)
13 N.C
15 H_D5 IN Magenta odd array nozzle data signal
16 DIK1 … Head temperature sensor's (diode) cathode side (color)
17 H_D0 IN Black even array nozzle data signal
18 H_ENB0 IN Black nozzle heat enable signal
19 N.C
20 H_LATCH IN Data latch enable signal
21 SUBH0 IN Color secondary heater driving signal
23 H_D7 IN Yellow odd array nozzle data signal
24 H_ENB2 IN Color nozzle heat enable signal (Even/odd array's even block)
25 H_D1 IN Black odd array nozzle data signal
26 DIA0 OUT Black
27, 35 HVDD IN Logic power source
28 H_EEPROM_CS IN Head EEPROM chip select signal
29 H_CLK IN Clock signal
30 E_D0 OUT Head EEPROM output data signal
31 H_D3 IN Cyan odd array nozzle data signal
32, 40 B_VH IN Color heater driving voltage
33, 34 A_VH IN Black heater driving voltage
36 H_EEPROM_SK IN Head EEPROM serial data clock signal
37 E_DI IN Head EEPROM input data signal
38 DIA1 OUT Head temperature sensor's (diode) anode side (color)
39 VHT IN Head power transistor driving power source