Epson Stylus COLOR 900 Service Manual page 173

EPSON Stylus COLOR 900/900N
Table 7-8. Connector Pin Assignment - CN12
Pin Signal Name I/O
1 ASF A I/O Phase A Input/Output data
When inputting, sends current through the
motor from Phase /A to ground.
2 ASF B I/O Phase B Input/Output data
When inputting, sends current through the
motor from Phase /B to ground.
3 ASF /A I/O Phase /A Input/Output data
When inputting, sends current through the
motor from Phase A to ground.
4 ASF /B I/O Phase /B Input/Output data
When inputting, sends current through the
motor from Phase B to ground.
Table 7-9. Connector Pin Assignment - CN13
Pin Signal Name I/O
1 +35V O Power supply for driving the fan
2 GND — Ground
Table 7-10. Connector Pin Assignment - CN14
Pin Signal Name I/O
1 THM1 I Analog signal for detecting the temperature on
the surface of the heat sink on the main board
2 THM2 — Ground
Function
Function
Function
Table 7-11. Connector Pin Assignment - CN15
Pin Signal Name I/O
1 GND — Ground
2 GND — Ground
3 SW0 I Power SW signal
4 PSC O Charging voltage for the timing capacitor in the
power-off delay circuit
5 SW1 I Load/Eject SW signal
6 SW2 I Cleaning SW signal
7 LED0 O Power On LED drive signal
8 LED1 O Ink Low/Ink Out LED drive signal (Color)
9 LED2 O Paper Out LED drive signal
10 LED3 O Ink Low/Ink Out LED drive signal (Black)
11 +5V O
Power supply for the PE sensor's LED
12 +5V O
13 GND — Ground
14 ASF I ASF sensor detection signal
15 PE I PE sensor detection signal
16 HP I CR HP sensor detection signal
17 PEVCC O Power supply for the PE sensor's
phototransistor
18 HPVCC O Power supply for the HP sensor's
phototransistor
Table 7-12. Connector Pin Assignment - CN16
Pin Signal Name I/O
1 VBB O Drive voltage for the solenoid (42V)
2 GND — Ground
Chapter 7 Appendix
Function
Function
170