Epson LQ 1050 Technical Manual - Page 46

REV.-A

Each component is connected to one of the connectors on the

PEGX

board, which are listed in Table

c

“:,

2-1. Table 2-1 describes the connectors.

Table 2-1 Board Connector Summary

Circuit

Connector

Description

Number

Reference

Board

Number

of Pins

Table

CN 1

Standard 8-bit parallel interface connector.

36

Used

for data transfer from the host computer.

Table A-1 5

Connector for the optional interface board. Used

CN2

for data transfer from the host computer. When

26

Table A-1 6

the optional interface board is mounted,

CN

1 is

invalid.

Supplies two step-down AC voltages from the

CN3

power supply transformer to the DC regulator

4

Table A-1 7

circuit on the

PEGX

board.

CN4

Drives the printhead needles.

12

Table A-1 8

CN5

Drives the plunger that opens and shuts the

2

Table A-1 9

PEGX

paper bail on the printer mechanism.

board

Transfers the state of the carriage home position

CN6

sensor from the printer mechanism to the con-

3

Table A-20

trol circuit on the

PEGX

board.

Transfers the state of the paper end sensor from

CN7

the printer mechanism to the control circuit on

2

Table A-2 1

the

PEGX

board.

CN8

Drives the paper feed motor.

6

Table A-22

CN9

Drives the carriage motor.

9

Table A-23

Transfers the state of the release lever from the

CN 10

printer mechanism to the control circuit on the

2

Table A-24

PEGX

board.

CN 11

Interface connector between the

PEGX

board

20

Table A-25

and the control panel.

‘(,.’

2-2

Section	Page
Front Cover	1
Preface	3
Revision Table	4
Precautions	5
Table of Contents	6
1. General Description	7
1.2 Specifications	12
2. Operating Principles	41
3. Optional Equipment	109
4. Disassembly, Assembly & Adjustment	110
5. Troubleshooting	157
6. Maintenance	178
Appendix	185
Overseas Marketing Locations	224

Epson LQ 1050 Technical Manual - Page 46

Table 2-1 Board Connector Summary

Page 46 highlights