Adjustment - JVC LT-26D50BJ Service Manual

4.1 ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV : One is with the
REMOTE CONTROL UNIT and the other is the
conventional method using adjustment parts and
components.
(2) The adjustment using the REMOTE CONTROL UNIT is
made on the basis of the initial setting values. The
setting values which adjust the screen to the optimum
condition can be different from the initial setting
values.
(3) Make sure that connection is correctly made AC to AC
power source.
(4) Turn on the power of the TV and measuring instruments for
warning up for at least 30 minutes before starting
adjustments.
d u p a
(5) If the receive or input signal is not specified, use the most
appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors,
transformers and condensers) not shown in the adjustment
items of this service adjustment.
4.2 PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
Setting item
PICTURE MODE
PICTURE adjustments
COLOUR TEMP.
DIGITAL VNR
Super DigiPure
MOVIE THEATRE t o r
COLOUR MANAGEMENT
PICTURE MANAGEMENT
SOUND adjustments
BBE
3D SOUND
A.H.B
ZOOM
4.3 MEASURING INSTRUMENT AND FIXTURES
• Oscilloscope
• Signal generator (Pattern generator)
[PAL / 625i / 625p / 1125i(50Hz)]
• Remote control unit
1-16 (No.YA205)
SECTION 4

ADJUSTMENT

Settings position
STANDARD
Centre
NORMAL
AUTO (LOW)
AUTO
AUTO
ON
ON
Centre
OFF
OFF
OFF
FULL
4.4 ADJUSTMENT ITEMS
VIDEO CIRCUIT
• 625i A-D OFFSET adjustment
• 1125i(50Hz) BRIGHTNESS adjustment
• 1125i(50Hz) A-D OFFSET adjustment
• SUB SCREEN A-D OFFSET adjustment
• WHITE BALANCE (HIGH LIGHT) adjustment
4.5 BASIC OPERATION OF SERVICE MODE
4.5.1 HOW TO ENTER THE SERVICE MODE
(1) Press [INFORMATION] key and [MUTING] key on the
remote control unit simultaneously to enter the SERVICE
MODE SCREEN.
(2) In the SERVICE MENU, press the [1] key to display
ADJUSTMENT MODE SCREEN.
NOTE:
• Before entering the SERVICE MODE, confirm that the
setting of VCR/TV/DVD switch is at the "TV" side. If the
switches have not been properly set, you cannot enter the
SERVICE MODE.
• When a number key other than the [1] to [3] key is pressed
in the SERVICE MODE SCREEN, the other relevant screen
may be displayed.
This is not used in the adjustment procedure. Press the
[MENU] key to return to the SERVICE MODE SCREEN.
SERVICE MODE SCREEN
SERVICE MENU SERVICE MENU
1.ADJUST 1.ADJUST
2.SELF_CHK 2.SELF_CHK
3.I2C STOP 3.I2C STOP
ADJUSTMENT MODE SCREEN
S001 PREPARE S001 PREPARE
PAL50 PAL50 FULL FULL
4.5.2 HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.
0 0
STD STD H H