Panasonic TC-21FG20P Service Manual

Also see for TC-21FG20P: Service manual

Contents

Panasonic TC-21FG20P Service Manual Manual pdf 9 page image

Colour Purity1. Set the Brightness and Contrast controls to their maximumpositions.2. Operate the TV set for 60 minutes.3. Fully degausse the picture tube by using an externaldegaussing coil.4. Apply a crosshatch pattern signal and adjust the staticconvergence magnets to the approximately correct position.5. Receive a black and white signal.6. Set the control as follows:Red................minimumGreen.............minimumBlue...............minimumPress the Shipping button on the remote control twice toselect CRT Adjustment Mode to select low light.7. Loosen the clamp screw for the Deflection Yoke A in Fig. 10and move the Deflection Yoke as close to the purity magnetas possible.8. Adjust the purity magnetic rings so that a vertical green fieldis obtained at the centre of the screen.Fig. 69. Slowly push the Deflection Yoke and set it where a uniformgreen field is obtained.Fig. 2110. Re-adjust the Low Light controls to their correct settingsand make sure that a uniform white field is obtained.11. Tighten the clamp screw A in Fig. 10.Convergence1. Apply a crosshatch pattern signal and Normalize Contrastcontrol to the maximum positions.2. Adjust Brightness until the grey position of the crosshatchpattern just becomes black.3. Adjust the Red and Blue line at the centre of the screen byrotating the R-B static.Fig. 84. Adjust Red and Blue with Green line at centre of the screenby rotating (RB)-G static convergence magnetic rings.5. Lock convergence magnets with silicone sealer.6. Remove the DY wedges and slightly tilt the Deflection Yokevertically and horizontally to obtain the good overallconvergence.Fig. 97. Fix the Deflection Yoke by reinserting the DY wedges. Referto Fig. 10.8. If purity error is found, repeat “Colour Purity” adjustment.Before Colour Purity, Convergence and White Balance adjustment are attempted,V. Height, H. Centre and Focus adjustments must be completed.9