Epson MX-80 Technical Manual page 18

(4) Connectors CN4
(a) Use ................... Two CN4 connectors (one with male contacts and the
other with female contacts) are used to supply control
signals between the control circuit board and driver cir-
cuit board of the MX-80.
(b) Number of pins ........ 22 pins
(c) Pin assignment ......... Refer to Table 2.4 below.
Table 2.4 Pin Assignment of CN4
Connector
Signal Name
Description of Signal Direction
Pin No.
1
GP Ground Level
-
2 GP Ground Level
-
3
-
- -
4
-
-
-
5
GP Ground Level
-
6
GP
Ground Level
-
7
H8 Head Solenoid Drive Signal Out
8
H7 Head Solenoid Drive Signal
Out
9
H6 Head Solenoid Drive Signal Out
10 H5
Head Solenoid Drive Signal
Out
11 H4 Head Solenoid Drive Signal Out
12 H3
Head Solenoid Drive Signal
Out
13 H2 Head Solenoid Drive Signal Out
14 H1
Head Solenoid Drive Signal
Out
15 H9 Head Solenoid Drive Signal Out
16
(555Q)
-
In
17 R Reset In
18
PE Paper End In
19 CRB Phase B for Carriage Stepper Motor Drive Out
20
(132 Columns)
-
Out
21
(FP)
- Out
22
CRA Phase A for Carriage Stepper Motor Drive Out
NOTE: "Direction" refers to the direction of signal flow as viewed from the control circuit board,
REV. A
2-6