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White Balance Adjustment (33k) - Sony TRINITRON PVM-14L5 Service Manual

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2-15. White Balance Adjustment (33k)

1. Connect the 33K 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 submenus 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 dc/cm
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.
2-24
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. Put the unit into the service mode.
3. Select WHITE BALANCE.
4. Select SUB BRIGHT.
5. Set as follows from the operation panel:
CONTRAST : 0 (MIN)
BRIGHT : 0 (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 VR 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 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
PVM-14L5/20L5/D14L5A/D20L5A

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