Epson SQ-B50/2550 Technical Manual page 80

REV.-A
2.3.2 Filter Circuit
The input filter is a conventional LC filter circuit, and functions both to dampen incoming noise and
to prevent externally-generated noise from running though the AC line. All the circuit's coils and
condensers are designed to withstand fluctuations in the incoming AC power.
F 1 RI
L
2A 4.7
5W
Cl
R2
0.22
390K
N
RO
Figure 2-6. Filter Circuit (SEIPS Board, 120 V Version)
F I R 1
1.25A
N o - - - - - o
R2
390K
R15
390K
RO
Figure 2-7. Filter Circuit (SANPSE Board, 220/240 V Version)
2-12