11. D/D Drive & Convert Circuit.19. Image Rotation (Tilt) Circuit.
+
This circuit is used for supplying Bvoltage toThis circuit corrects the tilt of the screen by supplying
horizontal deflection output transistor (Q708). Thisthe image rotation signal to the tilt coil which is
circuit makes to add side-pincushion correcting signalattached to the CDT near the deflection.
+
to Bvoltage.
20. Static Convergence Control Circuit.
12. Horizontal Deflection Output Circuit.
This circuit corrects the convergence of the screen by
This circuit makes the horizontal deflection bysupplying the convergence signal to the 4H (STC) coil
supplying the saw-tooth current to the horizontalwhich is attached to the CDT near the deflection.
deflection yoke.
21. Moire Reduction Circuit
13. High Voltage Output & FBT (Flyback Transformer).
This circuit reduce interference between the periodical
The high voltage output circuit is used for generatingdisplay pattern and the CDT's slot (or dot).
pulse wave to the primary coil of the FBT (FlybackThe positions of every other one dot video signal
Transformer (T701)). A boosted voltage (about 26kV)beams (red, green, and blue beam) are shifted finely,
appears at the secondary of the FBT and it is suppliedthus reducing interference.
to the anode of the CDT.
And there are another output voltages such as the22. OSD Circuit.
dynamic focus voltage.
This circuit is used for performing the OSD (On-
Screen- Display) function.
14. H-Linearity Correction Circuit.
When a user selects the OSD Select/Adjustment
This circuit corrects the horizontal linearity for eachcontrol, the adjustment status displays on the screen.
horizontal sync frequency.
23. Video Pre-Amp Circuit.
15. Vertical Output Circuit.
This circuit amplifies the analog video signal from 0-
This circuit takes the vertical wave from the TDA91130.7V to 0-4V. This circuit is operated by taking the
(IC701) and performs the vertical deflection byclamp, R, G, B drives, and contrast signals from the
supplying the saw-tooth wave current from theMicom (IC401).
TDA8172 (IC601) to the vertical deflection yoke.
24. Video Output Amp Circuit.
17. Dynamic Focus Output Circuit.
This circuit amplifies the video signal which comes
This circuit takes H and V parabola wave from thefrom the video pre-amp circuit and amplified video
TDA9113 (IC701), and amplifies these waves to offersignal is applied to the CDT cathode.
to the FBT (T701).
18. H & V Blanking and Brightness Control.
This circuit eliminates the retrace line by supplying a
negative pulse to the G1 of the CDT. The brightness
control circuit is used to control of the screen
brightness by changing the DC level of G1.
- 14 - |
ACEC
LG-GOLDSTAR
