Epson FX Series

PRINCIPLES OF OPERATION
Correspondence between dot wires and FPC
Common Itna
Wire arrangement
Fig. 1-20. Print Head
1-12
DETECTION MECHANISM
HP (Home Position)Sensor
Detection System
Output System
Circuit
Photo-electric conversion
Open-collector
See Fig. 1-21
+5V
200a
■^vw—♦
I 5Ka
1.5 nn
-o wv—
470P
LS74
0 Q
BB
CL
PTS aisnti
Fig. 1-21. HP Sensor Circuit
Timing
T Kgntl
n tignal
|wav« at point |A))
HOME iignil
(wave at point (81)
Horn* poiition
Fig. 1-22. First Dot Position
EPSON PRINTERS
•O RtiS"*'
-O KOMEugn*!
Utdol