Filter Circuit; Transformer - Epson LQ 1050 - B/W Dot-matrix Printer Technical Manual

REV.-A

2.3.2.1 Filter Circuit

The AC
line voltage passes through
used on the PEBFIL-11 board. The filter circuit attenuates external noise and inhibits noise generated
in the printer from going out via the AC line. Either C 1 or C2 drains leakage current between the primary
coil and the case. Figure 2-1 1 shows the filter circuit.
I
( 22~/240V Version Only)

2.3.2.2 Transformer

AC Voltages(120 VAC, 220 VAC, 240 VAC) that pass through the filter circuit are divided into 26 VAC
and 12 VAC and supplied to the PEGX circuit. Figure 2-12 shows a schematic drawing of the power
transformer.
Hz
WHITE
o v~
IZOV Verslan
the power switch, then is input to the filter circuit. A fuse, F1, is ""
I
.
Figure 2-11. PEBFIL-11 Filter Circuit Board
2 7 . 6 VAC
blue
NW
Figure 2-12 Transformer Circuit
2-16
1
1
:
F 1 2A 125V ( iOOV Version
2A 125V ( 120V Version
1.25A 250V (220/240V
240 VAC
220 VAC
Z
Ov
TF
)
)
Version)
red
8.3 VAC