Sony FD Trinitron KV-21LT1E Service Manual

Also see for FD Trinitron KV-21FT2K: Instruction manual Service manual Service manual

Contents

193-3. Focus Adjustment1. Receive a television broadcast signal.2. Normalize the picture setting.3. Adjust the focus control located on the flyback transformerto obtain the best focus at the centre of the screen.Bring only the centre area of the screen into focus, themagenta-ring appears on the screen. In this case, adjust thefocus to optimize the screen uniformly.3-4. Screen (G2), White Balance[Adjustment in the service mode using the remotecommander]G2 adjustment1. Input a dot signal from the pattern generator.2. Set the Picture, Brightness and Colour to minimum.3. Apply 175V DC from an external power supply to the R, Gand B cathodes of the CRT.4. Whilst watching the picture, adjust the G2 control [SCREEN]located on the Flyback Transformer to the point just beforethe flyback return lines disappear.Layout of each control1. Input an all-white signal from the pattern generator.2. Enter into the ‘Service Mode’ by pressing ‘TEST’, ‘TEST’and ‘MENU’ on the Service Commander.3. Select ‘Service’ from the on screen menu display and pressthe right arrow button on the remote commander.4. The ‘Service’ menu will appear on the screen.[See Page 18]5. Set the ‘Contrast’ to MAX.6. Set the ‘R-Drive’ to 25.7. Adjust the ‘G-Drive’ and the ‘B-Drive’ so that the whitebalance becomes optimum.8. Press the ‘OK’ button to write the data for each item.9. Set the ‘Contrast’ to MIN.10. Adjust the ‘G-Cutoff’, and the ‘R-Cutoff’ with the left andright buttons on the remote commander so that the whitebalance becomes optimum.11. Press the ‘OK’ button to write the data for each item.White balance adjustment for TV modeV.STATBMC (Hexapole)PurityScreenFocus