JVC LT-Z32SX4B, Руководство по обслуживанию

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(No.YA209)1-21
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) Adjust < 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.