I850 Connector Locations And Pin Layout - Canon i550 Service Manual

2.2 i850 Connector Location and Pin Layout
2.2.1 Logic board
CN501
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CN506
H
7
CN505
CN421
CN201 (Carriage ribbon cable connector)
Pin No. Signal Name
1 - 10 VH
11 - 13 HVDD
14, 19, 20 GND
15 H_ENB3
16 H_ENB0
17 H_ENB1
18 H_ENB2
CN202 (Carriage ribbon cable connector)
Pin No. Signal Name
1 DIA0
2, 4, 9, 11 GND
3 THERMO
5,6 VSEN_3.3V
7 CR_ENCA
8 CR_ENCB
10 SNS_CDR_P
12 - 20 H_GND
CN203 (Carriage ribbon cable connector)
Pin No. Signal Name
1 - 8 H_D0 - D7
9 - 12 H_DS0 - DS3
13 H_EEPROM_DIO
14 H_EEPROM_SK
15 H_EEPROM_CS
16, 19 GND
17 H_CLK
18 H_LATCH1
20 DIA1
CN304 (Parallel interface connector)
See page 3-4 (CN302 Parallel Interface connector)
CN305 (USB interface connector)
See page 3-4 (CN301 USB Interface connector)
CN508
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H H
7 7
Figure 3-4 Logic Board
Function
24V head power supply
3.3V head power supply
Logic GND
Heat enable 3
Heat enable 0
Heat enable 1
Heat enable 2
Function
Diode sensor anode
Logic GND
Thermistor
3.3V sensor power supply
Encoder signal phase A
Encoder signal phase B
CDR sensor signal
Head GND
Function
Heat data
Heat data
EEPROM data
EEPROM clock
EEPROM chip select
Logic ground
Head transfer clock
Latch signal
Diode sensor anode
CN503
3 - 8
CN305
CN304
CN402 CN502