Focus; Screen (G2); White Balance Adjustments - Sony KV-32FV16 Service Manual

2-3. FOCUS

1. Input monoscope signal.
2. Set user controls to normal.
3. Set video mode to STANDARD.
4. Set the PICTURE to maximum.
5. Adjust at 325 Mark for best center/corner focus balance.
6. Receive an entire white signal. Make sure Magenta Ring is
at an acceptable level.
Focus

Screen (G2)

325 MARK
35
325
35 MARK
CENTER
CIRCLE
2-4. SCREEN (G2)
1. Input dot pattern from the pattern generator.
2. Set the user controls to NORMAL.
3. Attach the G2-Jig to the C Board.
5. Adjust RCUT, GCUT, BCUT, and SBRT in service mode
with an oscilloscope so that voltages on the red, green, and
blue cathodes are 170 ± 2.0Vdc.
5. Observe the screen and adjust SCREEN (G2) VR to obtain
the faintly visible background of dot signal.
6. Push the TEST + JUMP (+ Channel) to cut off the signal.
The screen should be bright or dark. Brightness of raster
must be increased when adjusting.
7. Adjust screen VR until the screen is slightly cut off, or
scarcely lights up. A signal cannot be seen when the
brightness of the raster is high.
8. Push the JUMP again to release the cut off.
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
170 + 2.0 Vdc
GND

2-5. WHITE BALANCE ADJUSTMENTS

NO. Disp. Item
24 RDRV Red Drive
25 GDRV Green Drive
26 BDRV Blue Drive
27 RCUT Red Cut-off
28 GCUT Green Cut-off
29 BCUT Blue Cut-off
38 SBRT Sub Bright
1. Set program palette to STANDARD and pust RESET.
2. Input an entire white signal.
3. Set to Service Adjustment Mode.
4. Set the PICTURE and BRIGHT to minimum.
5. Adjust with SBRT if necessary.
6. Set RCUT to "14".
7. Select GCUT and BCUT with
8. Adjust with and
9. Set the PICTURE and BRIGHT to maximum.
10. Select GDRV and BDRV with
11. Adjust with 3 and 6 for the best white balance.
12. Write into the memory by pressing
.
13. Repeat steps 1-12 for GDR4, BDR4, GCU4 and BCU4
using Video 4 input.
* Use values from Sub Contrast Adjustments
NOTE:
White balance should be adjusted after Sub Contrast
because RDRV is also used in Sub Contrast Adjustment.
(See page 22).
— —
13
170Vdc
pedestal
All Models
*
44
38
14:Fix
7
6
6
and .
for the best white balance.
and .
then