White Balance Adjustment (33 K); Sub Bright, Sub Contrast Adjustment (15 K) - Sony TRINITRON PVM-14L2 Service Manual

2-15. White Balance Adjustment (33 k)

1. Connect the 33 K window signal to the Y/G terminal
of RGB/COMPONENT IN connector.
2. Enter the service mode.
3. Select RGB/COMPONENT.
4. From the operation panel, set as follows :
CONTRAST : 80
BRIGHT : 0 (mechanical center)
5. Select the following sub menus from the Service Menu
in the order of : [SIGNAL] → [WHITE BALANCE]
and set [COLOR TEMP] to D65.
6. Set [X] of the menu to 313 and [Y] to 329. (Increase
brightness to 100 cd/m
7. Set [MANUAL/AUTO] to MANUAL.
8. Press the [MONO] key to enter the black-and-white
mode.
9. Select [ADJUST GAIN].
10. While fixing G to 700, adjust B and R for optimum
white balance.
11. Upon completion of adjustment, press the [MENU]
key to return to the previous menu.
12. Change the signal level to 3 cd/cm
13. Select [ADJUST BIAS] of the menu.
14. While fixing G to 700 in the same way as in step 10,
adjust B and R for the unity cut-off level.
15. Upon completion of adjustment, press the [MENU]
key to return to the previous menu.
16. Repeat adjustments from step 9 to step 14 until all
specifications are satisfied all at the same time.
(Tracking)
17. Set [COLOR TEMP] to D93.
18. Set [X] of the menu to 283 and [Y] to 298.
19. Set [MANUAL/AUTO] to MANUAL.
20. Repeat adjustments from step 9 to step 16 in the same
way.
21. Press the [MONO] key to exit the black-and-white
mode.
PVM-14L2/20L2
2
or more.)
2
.
2-16. SUB BRIGHT, SUB CONTRAST
Adjustment (15 K)
1. Input the 15 K monoscope signal to the COMPO-
NENT IN connector.
2. Enter the service mode.
3. Select WHITE BALANCE.
4. Select SUB BRIGHT.
5. Set as follows from the operation panel:
CONTRAST : 0 (MIN)
BRIGHT : 0 (mechanical center)
6. Adjust [SUB-BRIGHT] in the service mode so that
the 20-tone gray scale will be as follows :
0 and 5 IRE 8 CUT-OFF
10 IRE 8 Slight glow
7. Set CONTRAST on the operation panel to 80.
8. Turn off the CONTRAST display.
9. Select SUB CONTRAST.
10. Input the window signal whose size is less than what is
shown below.
26 usec
Fig. 2-30
11. Adjust luminance to the under standard value with
SUB-CONTRAST.
Standard value :
14 inch MODEL
2
SUB CONT 170 cd/m
12. Select UNDER SCAN. (4 : 3 UNDER SCAN)
13. Select SUB CONTRAST and adjust luminance to the
standard value that is specified in step 11, with SUB-
CONTRAST.
14. Select 16 : 9. (16 : 9 UNDER SCAN)
15. Select SUB CONTRAST and adjust luminance to the
standard value that is specified in step 11, with SUB-
CONTRAST.
16. Select UNDER SCAN. (16 : 9 NORMAL)
17. Select SUB CONTRAST and adjust luminance to the
standard value that is specified in step 11, with SUB-
CONTRAST.
18. Return to the 4 : 3 NORMAL screen.
19. Turn the POWER OFF.
11.4 usec
20 inch MODEL
2
150 cd/m
2-15