Sharp 61U-WP7H Service Manual page 30

61U-WP7H
55U-WP7H
No. AdjustingPoint
14 White balance adjust-
ment
(1) Receive the monoscope pattern signal. Set the AV mode to "STD" and the
quality-picture mode to "480P".
(2) Using the RGB Screen control, roughly adjust the cut-off level.
(3) Service mode numbers with the R/C unit keys, referring to the table below.
(4) Turn down the screen control to cut off the raster.
(5) Using the R/C unit keys, enter the Service mode numbers listed below.
Adjust the drive so that the raster becomes whitish.
(6) Lower the brightness and the picture level. Check the white balance on the
dark screen. If out of spec, readjust the cut-off directly.
(7) Repeat the above steps (5) and (6) to have the white balance good on the
bright screen.
(8) Now adjust the brightness as well.
(9) Set the quality-picture mode to "1080I", and take the above steps (5) thru
(8) again.
ADDRESS
V02
V03
V04
Variable range
ADDRESS
V05
V06
Variable range
30
Adjusting Procedure
ADJUSTMENT ITEM INITIAL VALUE
Red cut-off
Green cut-off
Blue cut-off
64~255
ADJUSTMENT ITEM INITIAL VALUE
Green drive 64
Blue drive 64
10~64~117
0
0
0