JVC LT-Z26SX5, Руководство по обслуживанию

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1-22 (No.YA327)
4.7 ADJUSTMENT PROCEDURE
4.7.1 VIDEO CIRCUIT
Item
Measuring
instrument
Test point Adjustment part Description
625i
A-D OFFSET Remote
control unit
Signal
generator
[1.ADJUST]
S001: PREPARE
(Adjustment setting mode change)
S008: 5i CB OF(625i cb offset)
S009: 5i CR OF(625i cr offset)
S030: R DRIVE(Red drive)
S031: G DRIVE(Green drive)
S032: B DRIVE(Blue drive)
(1) Receive a 625i component ramp pattern signal.
(2) Set PICTURE MODE to "
STANDARD ".
(3) Set ZOOM to " FULL ".
(4) Set WHITE BALANCE to " MID ".
(5) Select " 1.ADJUST " from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031 > (G DRIVE)
and < S032 > (B DRIVE) to " 133 ".
(7) Set < S001 > (adjustment setting mode change)
to set " 8 " and it change to the 625i A-D offset
adjustment setting mode.
(8) Adjust < S008 > (625i Cb offset) and < S009 >
(625i Cr offset) to lose the gap (red line, green
line and blue line) which appears at both ends
of a white part at the centre of the screen.
(9) Set < S001 > to set " 0 " and it change to the
normal mode.
(10) Press the [MUTING] key to memoirze the set
value.
1125i (50Hz)
BRIGHTNESS Remote
control unit
Signal
generator
[1.ADJUST]
S001: PREPARE
(Adjustment setting mode change)
S012: HD BL(1125i brightness)
S030: R DRIVE(Red drive)
S031: G DRIVE(Green drive)
S032: B DRIVE(Blue drive)
(1) Receive a 1125i (50Hz) gray scale pattern signal.
(2) Set PICTURE MODE to "
STANDARD ".
(3) Set ZOOM to " FULL ".
(4) Set WHITE BALANCE to " MID ".
(5) Select " 1.ADJUST " from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031 > (G DRIVE)
and < S032 > (B DRIVE) to " 133 ".
(7) Set < S001 > (adjustment setting mode change)
to set the values " 12 " and it change to the 1125i
black level adjustment setting mode.
(8) Adjust < S012 > (1125i brightness) to set the
0% black part in the upper half of the screen to
be brightest.
(9) Set < S001 > to set " 0 " and it change to the
normal mode.
(10) Press the [MUTING] key to memoirze the set
value.
1125i (50Hz)
A-D OFFSET Remote
control unit
Signal
generator
[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) Receive a 1125i (50Hz) 30% all white pattern
signal.
(2) Set PICTURE MODE to " STANDARD ".
(3) Set ZOOM to " FULL ".
(4) Set WHITE BALANCE to " MID ".
(5) Select " 1.ADJUST " from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031 > (G DRIVE)
and < S032 > (B DRIVE) to " 133 ".
(7) Set < S001 > (adjustment setting mode change)
to set " 13 " and it change to the 1125i A-D offset
adjustment setting mode.
(8) Adjust < 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 " 0 " and it change to the
normal mode.
(11) Press the [MUTING] key to memoirze the set
value.
Disappears the color at both ends.
Set the 0% black part to be brightest.
Minimize the red and blue noises in
the upper half of the screen.