14. H-Raster Centering Circuit.
This circuit makes that the back raster stay in center of the
screen by adjusting the SW701.
15. Vertical Output Circuit.
This circuit takes the vertical ramp wave from the
TDA4855 (IC701) and performs the vertical deflection by
supplying the saw-tooth wave current to the vertical
deflection yoke.
16. Dynamic Focus Output Circuit.
This circuit takes H and V parabola waves from the
TDA4855 (IC701) and amplifies these waves to offer to
the FBT (T701).
17. H & V Blanking and Brightness Control.
This circuit eliminates the retrace line by supplying a
negative pulse wave to the G1 of the CRT. This circuit is
used for control of the screen brightness by changing the
DC level of G1.
18. Image Rotation Circuit.
This circuit corrects the tilt of the screen by supplying the
image rotation signal to the tilt coil which is attached to the
CRT near the deflection yoke.
19. OSD Circuit.
This circuit is used for performing the OSD (On Screen
Display) function.
When a user selects the Enter button and OSD
Select/Adjust control, the adjustment status displays on
the screen.
20. Video Pre-Amp Circuit.
This circuit amplifies the analog video signal from 0-0.7V
to 0-4V. This circuit is operated by taking the clamp, R, G,
B drives, and contrast signals from the Micom (IC401).
21. Video Output Amp Circuit.
This circuit amplifies the video signal which comes from
the video pre-amp circuit and amplified video signal is
applied to the CRT cathode.
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