JVC PD-35DX Service Manual page 44

PD-35DX
Measuring
Item
instrument
WHITE Remote control
BALANCE unit
(HIGH LIGHT)
Signal generator
OSD OFFSET Remote control
unit
Signal generator
OSD-G
Adjust so that background in this part is in the
same color as its surroundings.
1-44 (No.52089)
Test point Adjustment part
[2. V/C]
S13: R GAIN
S15: G GAIN
S17: B GAIN
[4.DD/CM]
OSD-G
(OSD green
offset)
OSD-B
(OSD blue offset)
OSD-R
(OSD red offset)
XXXX
Fig.13
Description
(1) Receive a PAL 75% all-white signal.
(2) Set white balance to "MID."
(3) Select "2. V/C" from the SERVICE MENU.
(4) Fix one of <S13> (R GAIN), <S15> (G GAIN), or
<S17>(B GAIN). Then, lower the other two that are
not fixed so that the all-white screen is equally white
throughout.
NOTE:
Set one or more of <S13>, <S15>, and <S17>
to 255.
(5) Check that white balance is properly tracked from
low light to high light.
If the white balance tracking is deviated, adjust to
correct it.
(6) Press the [OK] key to save the value.
(1) Input a picture whose signal (synchronization state)
is stable.
(2) Select "4. DD/CM" from the SERVICE MENU.
(3) Select <OSD-G>(OSD green offset). If you select
<OSD-G>, then the screen turns to OSD adjustment
mode. (See Fig.13)
(4) Adjust <OSD-G>, <OSD-B>(OSD blue offset),
and <OSD-R>(OSD red offset) so that OSD
background is in the same
surroundings.
When the background is in green, fix <OSD-G> and
adjust the other two.
When the background is in blue, fix <OSD-B> and
adjust the other two.
When the background is in red, fix <OSD-R> and
adjust the other two.
(5) Press the [OK] or [MENU] key to save the value.
(6) Check that there is no noise such as horizontal
noise.
(7) If noise is detected, lower <OSD-G>, <OSD-B>, and
<OSD-R> by one level so that no noise is detected.
colour as its