Panasonic TC-21PM30R Service Manual

Contents

Panasonic TC-21PM30R Service Manual Manual pdf 10 page image

Before Colour Purity, Convergence and White Balance adjustment are attempted,V. Height, H. Centre and Focus adjustments must be completed.Colour Purity Convergence1. Set the Brightness and Contrast controls to 1. Apply a crosshatch pattern signal andtheir maximum postions. Normalize Contrast control to the2. Operate the TV set for 30 minutes. maximum positions.3. Fully degauss the picture tube by using an 2. Adjust Brightness until the grey position ofexternal degaussing coil. the crosshacth pattern just becomes black.4. Apply a crosshatch pattern signal and adjust 3. Adjust the Red and Blue line at the centre ofthe static convergence magnets to the the screen by rotating the R-B staticapproximately correct position.5. Receive a black and White signal.6. Set the control as following:Red ................ minimumGreen ............. minimumBlue ............... minimumPress the Shipping button on the remote controltwice to select CRT Adjustment Mode as perFig. 16 to select low light.7. Loosen the clamp screw for the deflection yokeA in Fig. 24 and move the deflection yoke as closeto the purity magnet as possible.8. Adjust the purity magnetic rings so that a verticalgreen field is obtained at the cntre of the screen.Fig.224. Adjust Red and Blue with Green line atcentre of the screen by rotating (RB) -Gstatic convergence magnetic rings.5. Lock convergence magnetic with silicnesealer.6. Remove the DY wedges and slightly tilt thedeflection yoke vertically and horizontally toobtain the good overall convergence.Fig.209. Slowly push the deflection yoke and set it wherea uniform green field is obtained.10. Re-adjust the Low Light controls to their correct set-tings and make sure that a uniform white field isobtained. 7. Fix the deflection yoke by re-inserting the DY11. Tighten the clamp screw A in Fig. 24. wedges.Refer to Fig. 24.8. If purity error is found, repeat “ColourPurity” adjustment.Slide magnetic tabs toward or away fromeach other.R-B StaticConvergence MagnetVerticalConvergenceRed & BlueHorizontalConvergenceRed & BlueRotate both magnetic rings together.R-B StaticConvergence MagnetVerticalHorizontal RGBRGBRGBBGRBGRPurity Magnet Green FieldColour PurityGreenUniformgreenFig. 21Fig. 23