Service manual

EPSON Stylus COLOR 480 Revision B
Appendix Connector Summary 130
Table 7-4. CN3 - PF Motor
Pin Signal Name I/O Function
1 PFA Out Phase drive signal (A)
2 PFB Out Phase drive signal (-A)
3 PF-A Out Phase drive signal (B)
4 PF-B Out Phase drive signal (-B)
Table 7-5. CN4 - Printhead
Pin Signal Name I/O Function
1 THM In Thermistor detect signal
2 CH Out
Waveform selection signal for MS shot &
variable shot
3 GND --- Ground
4 LAT Out Head data latch pulse output
5 GND --- Ground
6 NCHG Out All nozzle fire selection pulse
7 GND --- Ground
8 SCK Out Serial clock
9 GND --- Ground
10 SI2 Out Print data output (2)
11 SP Out Select signal for CH signal
12 SI1 Out Print data output (1)
13 VDD --- Logic power supply (+5V)
14 GND2 --- Ground
15 COM --- Head drive pulse (trapezoid waveform)
16 VHV --- +42V power supply for nozzle selector
Table 7-6. CN5 - Power Supply Board
Pin Signal Name I/O Function
1 +42V --- Mechanism drive power supply
2 +42V --- Mechanism drive power supply
3 GND --- Ground
4 GND In Energy saving signal
5 NC In Not connected
6 GND --- Ground
7 GND --- Ground
8 +5V --- Logic power supply