SONY FD TRINITRON _ KV-28FQ75 _ KV-32FQ75 _ SERVICE MODE _ FOCUS _ G2 & WHITE BALANCE ADJUSTMENTS
FOCUS ADJUSTMENT
- Receive a television broadcast signal.
- Normalize the picture setting.
- Adjust the focus control located on the flyback transformer to obtain the best focus at the centre of the screen. Bring only the centre area of the screen into focus, the magentaring appears on the screen. In this case, adjust the focus to optimize the screen uniformly.
{Adjustment in the service mode
using the remote commander}
TO ENTER SERVICE MODE:
- Enter into the ‘Service Mode’ by pressing ‘TEST’, ‘TEST’ and ‘MENU’ ‘MENU’ on the Service Commander.
G2 [SCREEN] ADJUSTMENT {RV 5376}
- Input a dot signal from the pattern generator.
- Set the Picture, Brightness and Colour to minimum.
- Apply 170V DC from an external power supply to the R, G and B cathodes of the CRT.
- Whilst watching the picture, adjust the G2 control RV5376 [SCREEN] located on the C Board to the point just before the flyback return lines disappear.
WHITE BALANCE ADJUSTMENT [TV MODE]
- Input an all-white signal from the pattern generator.
- Enter into the ‘Service Mode’ by pressing ‘TEST’, ‘TEST’ and ‘MENU’ ‘MENU’ on the Service Commander.
- Select ‘Backend’ from the on screen menu display and press ‘OK’.
- The ‘Backend’ menu will appear on the screen
- Set the ‘Contrast’ to MAX.
- Set the ‘R-Drive’ to 41.
- Adjust the ‘G-Drive’ and the ‘B-Drive’ so that the white balance becomes optimum.
- Press the ‘OK’ button to write the data for each item.
- Set the ‘Contrast’ to MIN.
- Set the ‘R-Cutoff’ to 31.
- Adjust the ‘G-Cutoff’, and the ‘B-Cutoff’ with the left and right buttons on the remote commander so that the white balance becomes optimum.
- Press the ‘OK’ button to write the data for each item.
TO ENTER SERVICE MODE BY SUPPLIED CUSTOMER REMOTE COTNROL
- Turn on the main power switch of the set while pressing P + (plus) and P - (minus) buttons on the front drop down control panel.
- ‘TT’ will appear in the upper right corner of the screen.
- Press the ‘MENU’ button twice on the remote commander to obtain the service menu on the screen.
- Push the joystick up or down on the remote commander to select the adjustment item.
- Push the right button to proceed to the next menu.
- If the required adjustment item is ‘Deflection’, push the down button to move to ‘Deflection’.
- Push the joystick to the right to enter into ‘Deflection’.
- Change the data in order to comply with each standard.
Note :
Before performing any
adjustments ensure that the correct model has been selected in the ‘Model
Setting’ menu.
After
carrying out the service adjustments, to prevent the customer accessing the
‘Service Menu’ switch the TV set OFF and then ON.
