JVC LT-26X575/KA Service Manual page 23

Measuring
Item
instrument
1125i Remote
A-D OFFSET control unit
Signal
generator
Minimize the red and blue noises in
the upper half of the screen.
SUB SCREEN Remote
A-D OFFSET control unit
Signal
generator
Set the 0% block part to be brightest.
VIDEO-1
<NO SIGNAL>
Test point Adjustment part
[1.ADJUST]
S001: PREPARE
(Adjustment setting mode change)
S013: HD CB OF(1125i cb offset)
S014: HD CR OF(1125i cr offset)
S030: R DRIVE(Red drive)
S031: G DRIVE(Green drive)
S032: B DRIVE(Blue drive)
[1.ADJUST]
S001: PREPARE
(Adjustment setting mode change)
S016: RT CB OF
(Sub screen cb offset)
S017: RT CR OF
(Sub screen cr offset)
S030: R DRIVE(Red drive)
S031: G DRIVE(Green drive)
S032: B DRIVE(Blue drive)
TV(RF)
<30% all white>
Description
(1) Receive a 1125i 30% all white pattern signal.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Set "COLOR TEMPERATURE" to LOW.
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031> (G DRIVE)
and < S032 > (B DRIVE) to "255".
(7) Set < S001 > (adjustment setting mode change)
to set "013" and it change to the 1125i A-D
offset adjustment setting mode.
(8) Set < S013 > (1125i Cb offset) to minimize the
blue noise in the upper half of the screen.
(9) Set < S014 > (1125i Cr offset) to minimize the
blue noise in the upper half of the screen.
(10) Set < S001 > to set "000" and it change to the
normal mode.
(11) Press the [MUTING] key to memoirze the set
value.
(1) Set "VIDEO STATUS" to STANDARD.
(2) Set "ASPECT" to FULL.
(3) Set "COLOR TEMPERATURE" to LOW.
(4) Set "MULTI SCREEN" to TWIN.
(5) Receive a NTSC 30% all white pattern signal on
the Right screen. At the same time, set the Left
screen in VIDEO-1 mode (No signal).
(6) Select "1.ADJUST" from the SERVICE MODE.
(7) Set < S030 > (R DRIVE), < S031> (G DRIVE)
and < S032 > (B DRIVE) to "255".
(8) Set < S001 > (adjustment setting mode change)
to set "017" and it change to the sub screen A-
D offset adjustment setting mode.
(9) Set < S016 > (Sub screen cb offset) to minimize
the blue noise in the upper half of the screen.
If you select an adjustment item < S016 >,
then the screen automatically turn to twin
pictures mode.
(10) Set < S017 > (Sub screen cr offset) to minimize
the red noise in the upper half of the screen.
(11) Readjust < S016 > and < S017 > to set the
upper half of the screen to be the blackest. (See
Fig.9)
(12) Set < S001 > to set "000" and it change to the
normal mode.
(13) Press the [MUTING] key to memoirze the set
value.
(No.YA179)1-23