JVC HD-52Z585 Service Manual page 33

Measuring
Item
instrument
Signal
WHITE
generator
BALANCE
(High light)
Remote
adjustment
control unit
4.7.3 MTS CIRUT
Measuring
Item
instrument
Remote
MTS INPUT
control unit
LEVEL
adjustment
TV audio
MTS
multiplex
SEPARATION
adjustment
Oscilloscope
Remote
control unit
L-Channel
signal waveform
1 cycle
Test point Adjustment part
[1. ADJUST]
S030:R DRIVE
(Red drive)
S031:G DRIVE
(Green drive)
S032:B DRIVE
(Blue drive)
Test point Adjustment part
[1. ADJUST]
T001:IN LEVEL
[1. ADJUST]
T002: LOW SEP
T003: HIGH SEP
R-Channel
crosstalk portion
Minimum
Description
(1) Receive a NTSC all-white (75% 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 MENU.
(6) Fix one of < S030 > (Red drive), < S031 > (Green
drive) or < S032 > (Blue drive). Then, lower the other
two that are not fixed so that the all-white screen is
equally white throughout.
(7) Adjust one or more of < S030 > (R.DRIVE), < 031 >
(G DRIVE) and < 032 > (B DRIVE) to set values [128].
(8) Check that white balance is properly tracked from
low light to high light. If the white balance tracking is
deviated, adjust to correct it.
(9) Press the [MUTING] key to memorized the set
value.
Description
(1) Select the [1.ADJUST] from the SERVICE MENU.
(2) Select the <T001> (IN LEVEL).
(3) Set the <T001> (IN LEVEL) to initial setting value.
(4) Press the [MUTING] key to memorized the set
value.
(1) Input stereo L signal (300Hz) from the TV audio
multiplex signal generator to the antenna terminal.
(2) Connect an oscilloscope to L OUTPUT pin of the
AUDIO OUT, and display one cycle portion of the
300Hz signal.
(3) Change the connection of the oscilloscope to R
OUTPUT pin of the AUDIO OUT, and enlarge the
voltage axis.
(4) Select <T002> (LOW SEP.).
(5) Set the initial setting value of <T002> (LOW SEP.).
(6) Adjust <T002> (LOW SEP.) so that the stroke
element of the 300Hz signal will become minimum.
(7) Change the signal to 3kHz, and similarly adjust
<T003> (HIGH SEP.).
(8) Press the [MUTING] key to memorized the set
value.
(No.YA092B)1-33