Service manual

EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
APPENDIX Connector Summary 117
Table 7-2. CN1 - Printhead
Pin Signal Name I/O Function
1 COM O Head drive pulse (trapezoid waveform)
2 GND2 — Ground
3 GND — Ground
4 XHOT I Head temperature signal
5 VDD2 — +3.3V
6 NCHG O All nozzle fire selection pulse
7 GND — Ground
8 CH O Charge signal for the trapezoidal waveform
9 VDD — +3.3V
10 LAT O Head data latch pulse output
11 NC — Not connected
12 GND — Ground
13 SCK — Serial clock
14 GND — Ground
15 SI1_Bk O Print data output for black nozzles
16 GND — Ground
17 SI2_Col O Print data output for color nozzles
18 GND — Ground
19 VHV O +42V power supply for nozzle selector
20 COM O Head drive pulse (trapezoid waveform)
21 GND2 — Ground
Table 7-3. CN2 - CR Encoder Sensor and CSIC Board
Pin Signal Name I/O Function
1 ENCA I Encoder feed back signal ch.A
2 EVDD O Power for CR Encoder
3 ENCB I Encoder feed back signal ch.B
4 GND — Ground
5 NC — Not connected
6 CSCK I/O Clock signal for CSIC read/write
7 CVDD O Power supply for CSIC
8 CGND — Ground
9 CRST O Reset signal for address counter of CSIC
10 CSDA I/O CSIC transmit and receive data
11 COI I Cartridge detect signal
12 Enable I General-purpose port
13 CH O Charge signal for the trapezoidal waveform
14 VDD — +3.3V
15 GND — Ground
16 COM O Head drive pulse (trapezoid waveform)
17 VHV O +42V power supply for nozzle selector
Table 7-4. J1 - Power Supply Board
Pin Signal Name I/O Function
1 GND — Ground
2 PSC I Power supply control
3 +42V — +42V