Epson FX Series Product Support

PRINCIPLES OF OPERATION
Filter Circuit
The filter circuit is situated on the FFIL circuit board together with the
printer power switch and fuse. The power cable is also, connected to the
iPilter board.
The AC input from the power line first flows across the power switch
and fuse F1. After being filtered out by C1, it issupplied to the primary
side of the power transformer via the LC noise prevention circuit. Power
line noise (external noise) into the printer and noise (internal noise)
occurring from the printer are eliminated by this noise prevention
circuit. Capacitors C2 and C3 are not used for the 120\/ version.
sw
Fl
L O-
. d\j>
SOOajH
C2 ^ i.700P
C1 dp O lpF
CN1
C3 iz 4700P
N O-
>N>.
-O
Fig. 1-9. Fuse and FilterCircuit
1-6
EPSON PRINTERS
Power Transformer
In the Printer, the power transformer changes the AC input into AC 26V
and 12VAC through the filter circuit and supplies necessary voltages to
the control circuit and option interface circuit.
PRIMARV PRIMARY
flCitC. o-
AClZOv o-
Bl ACK
SECONOARy
orange
SECONDARY
o
50/60HZ
Ov o-
TF
Pgray"
I flfay
wange
orange
AC9.1V
AC27 7V
o-
50/60H2
Ov O-
BROWN
white
iQfay
Ofange
orange
120V Version 220/240V Version
Fig. 1-10. Power Transformer Windings
AC9.0V
AC29.8V

Epson FX Series Specifications

General

Connectivity	Parallel
Paper Handling	Friction feed, Tractor feed
Emulation	Epson ESC/P
Noise Level	55 dB(A)
Print Method	Impact dot matrix