JVC PD-42WV74 Service Manual page 54

Mesuring
Item
instrument
WHITE Remote control
BALANCE unit
(HIGH-LIGHT)
Signal generator
OSD OFFSET Remote control
unit
Adjust so that background in this part is in the
same color as its surroundings.
F49
1-54 (No.YA029)
Test point Adjustment part
[1. PICTURE/SOUND]
S13: RDRV (R DRIVE)
S15: GDRV (G DRIVE)
S17: BDRV (B DRIVE)
S19: CUTR (R CUTOFF)
S21: CUTG (G CUTOFF)
[6. DD/CM]
DDT01: (NO DISPLAY)
(Picture control mode sw)
[1. PICTURE/SOUND]
F49: (NO DISPLAY)
(OSD G offset)
F50: (NO DISPLAY)
(OSD B OFFSET)
F51: (NO DISPLAY)
(OSD R OFFSET)
128
Fig.9
Description
(1) Input NTSC 75% all-white signal.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Select "COLOR TEMPERATURE" to LOW.
(5) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(6) Fix one of < S13 >(R DRIVE), < S15 >(G DRIVE),
or< S17 >(B DRIVE). Adjust two that are not fixed so
that the all-white screen is equally white throughout.
Set one of them to "255".
(7) Check that white balance is properly tracked from
lowlight to highlight .
(8) Press the [MUTING] key to memorize the set
values.
(9) Input 525i 75% all-white signal.
(10) Repeat steps (5) ~ (8).
(11) Input HD (1125i) all-white signal.
(12) Repeat steps (5) ~ (8).
(1) Input a picture whose signal (synchronization state)
is stable.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Select "COLOR TEMPERATURE" to LOW.
(5) Select "6.DD/CM" from the SERVICE MODE.
(6) Set < DDT01 > (Picture control mode sw) to "001" to
set OSD adjustment mode.
(7) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(8) Adjust < F49 > (OSD G offset), < F50 >(OSD B
OFFSET), and < F51 > (OSD R OFFSET) so that
OSD background is in the same color as its sur-
roundings. When the background is in green, fix <
F49 > (OSD G offset) and adjust the other two.
When the background is in blue, fix < F50 > (OSD B
OFFSET) and adjust the other two. When the back-
ground is in red, fix < F51 > (OSD R OFFSET) and
adjust the other two.
(9) Press the [MUTING] key to memorize the set
values.
(10) Display the MODE and check that there is no noise
such as horizontal noise. If noise is detected, lower
< F49 > (OSD G offset), < F50 > (OSD B OFFSET),
and < F51 > (OSD R OFFSET) by one level so that
no noise is detected.
(11) Select "6.DD/CM" from the SERVICE MODE.
(12) Set < DDT01 > (Picture control mode sw) to "000" to
cancel OSD adjustment mode.