Product specifications

DA100 (50Hz) and DA50W Chassis – Repair Notes
Page 30 of 80
Figure 27: FW Focus Modulator Circuit
The FW focus modulator circuit is slightly different to the GF circuit due to the type of screen being used. As
it is not a pure flat screen, the curvature of the screen effects the time that the electron beam takes to reach
the screen by a greater amount than with a flat screen. This effects the focus in both the horizontal and
vertical directions. The horizontal picture is compensated by using the technique described above, however the
vertical correction is derived from the east/west output signal.
Sharp Electronics (UK) Limited - May 2003
Revision 3