Filter Circuit - Epson ActionPrinter 3000 LQ-200 Service Manual

Principles of Operation

Filter circuit

The AC line voltage passes through the power switch and is input to the filter
circuit. The PEBFIL-II board includes a fuse, Fl. The filter circuit attenuates
external noise and inhibits the noise generated in the printer from propagating
through the AC line. Cl or C2 drains leakage current between the primary coil
and the case. Figure 2-12 shows the filter circuit.
Figure 2-12. PEBFIL-II Filter Circuit Board
2-13