Epson Scan 2500 service manual Connector Pin Assignment-CN8, Connector Pin Assignment-CN9

EPSON Stylus Scan 2500 Revision A

Table 7-7. Connector Pin Assignment-CN8

Pin No.	Signal Name	I/O	Function
1	PF-A	O	Phase drive signal (A)
2	PF-B	O	Phase drive signal (B)
3	PF-/A	O	Phase drive signal (/A)
4	PF-/B	O	Phase drive signal (/B)

Table 7-8. Connector Pin Assignment-CN9

Pin No.	Signal Name	I/O	Function
1	COB	I	I/C Black detect
2	COC	I	I/C Color detect
3	THM	I	Thermometer detect system
4	GND	O	Ground
5	LAT	O	Head data latch pulse output
6	GND	O	Ground
7	SI6	O	Head data output (6)
8	SI5	O	Head data output (5)
9	SI4	O	Head data output (4)
10	SI3	O	Head data output (3)
11	SI2	O	Head data output (2)
12	SI1	O	Head data output (1)
13	GND	O	Ground
14	CLK	O	Clock pulse for head data transfer
15	GND	O	Ground
16	NCHG	O	Head all on pulse output
17	GND	O	Ground
18	VDD	O	Logic power supply (+5V)
19	GND2	O	Ground
20	GND2	O	Ground
21	GND2	O	Ground
22	GND2	O	Ground
23	COM	O	Head drive power supply
24	COM	O	Head drive power supply

Table 7-8. Connector Pin Assignment-CN9 (cont.)

Pin No.	Signal Name	I/O	Function
25	COM	O	Head drive power supply
26	COM	O	Head drive power supply
27	VHV	O	Head drive voltage control signal

Table 7-9. Connector Pin Assignment-CN10

Pin No.	Signal Name	I/O	Function
1	+12V	I	Mechanism drive power supply
2	+24V	I	Mechanism drive power supply
3	GND	I	Ground
4	+24V	I	Mechanism drive power supply
5	GND	I	Ground
6	GND	I	Ground
7	+42V	I	Mechanical drive power supply
8	+42V	I	Mechanical drive power supply
9	+3.3V	I	Logic power supply
10	+3.3V	I	Logic power supply
11	+5V	I	Logic power supply
12	+5V	I	Logic power supply
13	GND	I	Ground
14	GND	I	Ground
15	GND	I	Ground
16	FAN42	O	Not needed
17	SWO	I
18	PSC	O	Power supply switch output signal

Table 7-10. Connector Pin Assignment-CN11

Pin No.	Signal Name	I/O	Function
1	HP	I	Sensor detect system
2	GND	O	Ground
3	HPWR	O	Sensor power supply (+5V)

Appendix Connector 144