Epson FX-870 Service Manual page 157

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