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I
W.
l/O
Signal Name
Function
1
- +5
+5
VDC
2 0 READY READY LED
3.
0 STAT STAT LED
( Not equipped)
4 0 FONT FONT LED
5 0 COND ‘CONDENSED LED
6 I PAUSE
PAUSE Button
7 I
FONT FONT Button
8 I PFEED
PAPER FEED Button
9 I OPERA
OPERATE Button
10
-
GND Signal Ground
7-4
Epson FX-870/1170
Table 7-8.
CNS,
Printhead
Table 7-11. CN13,
CarA&
Motor
(CO94 MAIN Board Assembly)
(CO94
MAlN
Board Assembly)
So.
l/O
Signal Name
Function
1
0 HD2 Head Data 2
2
0 c246 Head Drive Common
3
0 HD6 Head Data 6
4 0 HD8 Head Data 8
5 0 HD4 Head Data 4
6 0 HD9 Head Data 9
7 I
TMP Head Temperature
8 0 c789 Head Drive Common
9
0 TMP Head Temperature
10
0
HDl
Head Data 1
11
0 HD3 Head Data 3
12
0 HD5 Head Data 5
13
0 HD7 Head Data 7
14
0
Cl35
Head Driie Common
Table 7-9.
CNO,
Rear PE Sensor
(CO94 MAIN Board Assembly)
No.
l/O
Signal Name
Function
1
-
GND Signal Ground
2 I PER Rear Paper End
3 I LED
Paper End LED
Table 7-10. CN12, Control Panel
(CO94
MAIN
Board Assembly)
No.
l/O
Signal Name
Functlon
I
I1
I
I
01
&A
I
1
CR Motor Phase A
0
CRA
0
CRB
0 CRB
0 CRCOM
CR Motor Phase
x
CR Motor Phase
B
CR Motor Phase B
CR Motor Common
uo,
-
1
2
3
4
5
6
7
8
9
10
11
-
Table 7-12. CN14, Power Supply
(CO94 MAIN Board Assembly)
Signal Name
+5
+5
GND
GND
GND
GP
GP
GP
+35
Function
+5
VDC
+5 VDC
Signal Ground
Signal Ground
Signal Ground
Power Ground
Power Ground
Power Ground
+35
VDC
+35
VDC
Power Switch Signal