SONY KV34FV15
Manual de Servicio

KV-32FS10/32FV15/32XBR250/34FV10/34FV15/34FV15C/34FX250C/34FV15K 34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K

3-3. FOCUS
1. 2. 3. 4. 5. 6. Input Monoscope signal. Set user controls to normal. Set Video mode to STANDARD. Set the PICTURE to maximum. Adjust FOCUS control for best picture at center circle. Then receive an entire white signal. Make sure Magenta Ring is at acceptable level

7.

Adjust screen VR until the screen is just cut off, or scarcely lights up. A signal cannot be seen when the brightness of the raster is high. Push the JUMP again to release the cut off.

8.

170 + 2 Vdc
GND

pedestal

3-5. WHITE BALANCE ADJUSTMENTS
NO. 24 25 26 27 28 29 38
325

Disp. RDRV GDRV BDRV RCUT GCUT BCUT SBRT

Item Red Drive Green Drive Blue Drive Red Cut-off Green Cut-off Blue Cut-off Sub Bright

All Models 31 31 31 7 7 7 7

325 MARK

35

35 MARK
CENTER CIRCLE

1. 2. 3. 4. 5. 6. 7.

Set program palette to "STANDARD" and push "RESET. Input an entire white signal. Set to Service adjustment Mode. Set the PICTURE and BRIGHT to minimum. Adjust with SBRT if necessary. Set RCUT to "14". Select GCUT and BCUT with 1 and 4.
N N

3-4. SCREEN (G2)
1. 2. 3. 4. Input signal from the pattern generator. Set the user controls to NORMAL. Attach the G2-Jig to the C Board. Adjust RCUT, GCUT, BCUT, and SBRT in service mode with an oscilloscope so that voltages on the red, green, and blue cathodes are 170 + 2 V DC. Observe the screen and adjust SCREEN (G2) VR to obtain the fairly visible background of dot signal. Push the TEST +JUMP (+ Channel) to cut off the signal, then the screen is bright or dark. Brightness of raster must be increased when adjusting.

8. Adjust with 3 and 6 for the best white balance. 9. Set the PICTURE and BRIGHT to maximum. 10. Select GDRV and BDRV with 1 and 4. 11. Adjust with 3 and 6 for the best white balance. 12. Write into the memory by pressing then **. NOTE: White Balance should be adjusted after Sub Contrast because RDRV is also used in Sub Contrast adjustment. (See page 29)

5. 6.

� 20 �

N

N