G2 Adjustment; White Balance Adjustment ::+++++-:+S-Ssctsseeseeseeete - Sony TRINITRON PVM-14N1A Service Manual

2. Insert the wedges into the DY and CRT funnel face to fix the
DY. The number and position of the wedges are shown in the
figure below.
Position of 14 inch wedge Position of 20 inch wedge
3. The pattern below can not be corrected by turning the neck.
R- *Gun rotation
G_ The beam is twisted at both
B sides on the X axis and Y axis.
*HCR large (small)
At both sides of the screen the
G raster horizontal compo-
nent is wider (narrower) than
those of the R and B rasters.
*VCR large (small)
At both sides of the screen,
the G raster vertical compo-
nent is wider (narrower) than
those of the R and B rasters.
3-8, G2 ADJUSTMENT
1. Input the 625 or 525 all black signal.
2. Select the voltage shown below for each R, G, and B cath-
odes.
14 inch—»DC175.0V
20 inch—+DC160.0V
3. Adjust G2 VR so that the raster is slightly luminous.
3-9. WHITE BALANCE ADJUSTMENT
This model performs control of the white balance using the micro-
processor.
To adjust the white balance, first adjust the white balance of the
actual images using ; ,[B C/O], and[R DRIVE],
F , and then save the four reference data
[DRIVE LIMIT], [R REF] , [G REF], and [B REF] used for the
microprocessor to perform control.
For measuring equipment, use a color analyzer. (for example from
Minolta, etc.)
(Figure 1)
0.13 Vp-p
(Figure 2)
0.7 Vp-p
20 sec
1. Set contrast 50 and other settings to the standard level.
2. Set the LINE-A input.
3. Enter the service mode.
4. Input a gray signal (Figure 1) to LINE-A.
5. Adjust [G C/O] so that the luminance becomes 3+0.2 nit.
6. Adjust {R C/O] and [B C/O} so that the white balance becomes
the color temperature shown in Table 2 as below.
7. Repeat 5 to 6 until the luminance and color temperature meet
the specification.
8. Input the window signal (Figure 2) to LINE-A.
9. Adjust so that the luminance becomes 120+1 nit.
10. Adjust and so that the white balance
becomes the color temperature shown in Figure 2.
11. Repeat 9 to 10 until the luminance and color temperature meet
the specification.
12. Cutoff is shifted when drives are changed. Therefore, repeat
4 to 11 for the drive and cutoff until the luminance and color
temperature meet the specification.
13. Save the data.
Table 2
Color Temp D65+1JND_.