JVC PD-Z35DV4 Service Manual page 38

Measuring
Item
instrument
1125i
Remote control
A-D OFFSET
unit
Signal generator
Minimize the red and blue noises
in the upper half of the screen.
SUB-SCREEN
Remote control
A-D OFFSET
unit
Signal generator
Minimize the red and blue noisese in the upper half of the the screen.
VIDEO-1
<NO SIGNAL>
1-38 (No.YA101)
Test point Adjustment part
[1. ADJUST]
S001:PREPARE
(adjustment setting
mode change)
S013:HD CB OF
(1125i blue offset)
S014:HD CR OF
(1125i res offset)
S030:R DRIVE
(Red drive)
S031:G DRIVE
(Green drive)
S032:B DRIVE
(Blue drive)
Fig. 9
[1. ADJUST]
S001:PREPARE
(adjustment setting
mode change)
S016:RT CB OF
(Sub screen blue
offset)
S017:RT CR OF
(Sub screen red
offset)
S030:R DRIVE
(Red drice)
S031:G DRIVE
(Green drive)
S032:B DRIVE
(Blue drive)
TV(RF)
<30% all white>
Fig. 10
Description
(1) Receive a 1125i (50 Hz) 30% all-white pattern signal.
(2) Set PICTURE MODE to "STANDARD".
(3) Select "1.ADFJUST" from the SERVICE MENU.
(4) Set < S030 > (Red drive), < S031 > (Green drive) and
< S032 > (Blue drive) to set "133".
(5) Set < S001 > (adjustment setting mode change) to
set "013" and it change to the 1125i A-D offset
adjustment setting mode.
(6) Set < S013 > (1125i blue offset) to minimize the blue
noise in the upper half of the screen. (See Fig.9)
(7) Set < S014 > (1125i red offset) to minimize the red
noise in the upper half of the screen. (See Fig.9)
(8) Readjust < S013 > and < S014 > to set the upper half
of the screen to be the blackest. (See Fig.9)
(9) Set < S001 > to set "000" and it change to the normal
mode.
(10) Press the [MUTING] key to memorize the set value.
(1) Set PICTURE MODE to "STANDARD".
(2) Set MULTI-PICTURE to "TWIN-PICTURE".
(3) Receive a PAL 30% - all white pattern signal on the
right screen. At this time, make the left screen VIDEO-
1 mode (No signal).
(4) Select "1.ADFJUST" from the SERVICE MENU.
(5) Set < S030 > (Red drive), < S031 > (Green drive) and
< S032 > (Blue drive) to set "133".
(6) Set < S001 > (adjustment setting mode change) to
set "017" and it change to the sub-screen A-D offset
adjustment setting mode.
(7) Set < S016 > (Sub-screen blue offset) to minimize the
blue noise in the upper half of the screen. (See Fig.10)
NOTE:
•
If you select an adjustment item < S016 >, then the
screen automatically turn to twin pictures mode.
(8) Set < S017 > (Sub-screen red offset) to minimize the
red noise in the upper half of the screen. (See Fig.10)
(9) Readjust < S016 > and < S017 > to set the upper half
of the screen to be the blackest. (See Fig.10)
(10) Set < S001 > to set "000" and it change to the normal
mode.
(11) Press the [MUTING] key to memorize the set value.