White Balance Adjustment - Sony TRINITRON PVM-14L2 Service Manual

2-16. White Balance Adjustment

1. Connect the 15K window signal to the Y/G terminal of
RGB/COMPONENT IN connector.
2. Enter the service mode.
3. Select COMPONENT.
4. From the front panel, set as follows :
CONTRAST : 80
BRIGHT : 0 (mechanical center)
5. Set the CHROMA knob on the front panel to MIN.
6. Select the following sub menus from the Service Menu
in the order of : [SIGNAL] → [WHITE BALANCE]
and set [COLOR TEMP] to D65.
7. Select [ADJUST GAIN].
8. While fixing G to 700, adjust B and R for [X] : 313
and [Y] : 329.
9. Upon completion of adjustment, press the [MENU]
key to return to the previous menu.
10. Change the signal level to 3 cd/m
11. Select [ADJUST BIAS] of the menu.
12. While fixing G to 400 in the same way as in step 8,
adjust B and R for the unity cut-off level.
13. Upon completion of adjustment, press the [MENU]
key to return to the previous menu.
14. Repeat adjustments from step 7 to step 12 until all
specifications are satisfied all at the same time.
(Tracking)
15. Set [COLOR TEMP] to D93.
16. Set the adjustment value [X] : 283 and [Y] : 298.
17. Repeat adjustments from step 7 to step 14 in the same
way.
2-16
2-17. SUB BRIGHT, SUB CONTRAST
1. Input the 15 K monoscope signal to the COMPO-
2. Enter the service mode.
3. Select WHITE BALANCE.
4. Select SUB BRIGHT.
5. Set as follows from the operation panel:
6. Adjust [SUB-BRIGHT] in the service mode so that
7. Set CONTRAST on the operation panel to center.
8. Select SUB CONTRAST.
9. Input the window signal whose size is less than what is
2
.
10. Adjust luminance to the under standard value with
Standard value :
11. Select UNDER SCAN. (4 : 3 UNDER SCAN)
12. Select SUB CONTRAST and adjust luminance to the
13. Select 16 : 9. (16 : 9 UNDER SCAN)
14. Select SUB CONTRAST and adjust luminance to the
15. Select UNDER SCAN. (16 : 9 NORMAL)
16. Select SUB CONTRAST and adjust luminance to the
17. Return to the 4 : 3 NORMAL screen.
18. Turn the POWER OFF.
Adjustment
NENT IN connector.
CONTRAST : 0 (MIN)
BRIGHT : 0 (mechanical center)
the 20-tone gray scale will be as follows :
0 and 5 IRE 8 CUT-OFF
10 IRE 8 Slight glow
shown below.
26 usec
Fig. 2-28
SUB-CONTRAST.
14 inch MODEL
2
SUB CONT 170 cd/m
standard value that is specified in step 10, with SUB-
CONTRAST.
standard value that is specified in step 10, with SUB-
CONTRAST.
standard value that is specified in step 10, with SUB-
CONTRAST.
11.4 usec
20 inch MODEL
2
150 cd/m
PVM-14L2/20L2