Service manual

Appendix
A-2
EPSON FX-880/FX-1180 Service Manual
Table A-1. Connector Summary
Board Connector Pin Description
C229 Main Board
Assembly
CN1 36 Parallel interface
CN2 36 Type B interface (Optional)
CN3 10 DC input, Power on/off signals
CN4 2 Home Position (HP) sensor
CN5 3 Rear Page End (PE) sensor
CN6 2 Front PE sensor
CN7 16 Printhead, thermistor
CN8 4 Paper Feed (PF) motor
CN9 5 Carriage Return (CR) motor
CN10 2 Release lever position sensor
CN11 2 Paper Guide (PG) sensor
CN12 12 Control panel
C229 PSB/PSE/PSH
Board Assembly
CN1 2 AC line input
CN2 10 DC output, Power on/off signals
Table A-2. Connector Pin Assignments-CN1
Pin I/O Signal Function
1 In /STROBE Strobe pulse. Input data is latched at the falling edge of the
signal.
2 to 9 In DATA 1 to DATA
8
Parallel input data to the printer.
10 Out /ACKNLG Pulse signaling that the printer has received data and is ready
to accept more data.
11 Out BUSY HIGH signal indicates that the printer is not ready to accept
data.
12 Out PE HIGH signal indicates that the printer is out of paper.
13 Out SLCT Always HIGH when the printer is powered on.
14 In /AFXT Not used.
15

NC Not connected.
16

GND Signal ground.
17

Chassis Chassis ground.
18 Out Logic H
This line is pulled up to +5 V through 3.9K Ω.