Adjustment - JVC InteriArt AV-21BX16/L Schematic Diagrams

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
warming up for at least 30 minutes before starting
adjustments.
(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 ADJUSTMENT
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
Item
PICTURE MODE(VSM)
VNR
ECO MODE
BALANCE
BASS / TREBLE / BALANCE
CINEMA SURROUND
1-12 (No.YA465)
SECTION 4

ADJUSTMENT

4.3 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) HV voltmeter
(4) Signal generator
(Pattern generator : PAL/NTSC)
(5) Remote control unit
4.4 ADJUSTMENT ITEMS
CHECK ITEMS
• B1 VOLTAGE check
• HIGH VOLTAGE check
• IF VCO check
TUNER / IF CIRCUIT
• DELAY POINT (AGC) adjustment
FOCUS
• FOCUS adjustment
DEFLECTION CIRCUIT
• V.SLOPE adjustment
• V.POSITION adjustment
• V.SIZE adjustment
• H.POSITION adjustment
• H.SIZE adjustment
Preset value
• SIDE PIN adjustment
BRIGHT
• TRAPEZIUM adjustment
• V. LINEARITY adjustment
OFF
• CORNER adjustment
OFF
• H. PARALLEL adjustment
Centre
• H.BOW adjustment
Centre
VIDEO CIRCUIT
• WHITE BALANCE adjustment
OFF
• SUB BRIGHT adjustment
• SUB CONTRAST adjustment
• SUB COLOUR adjustment
• SUB TINT adjustment
VSM PRESET SETTING
• VSM PRESET
PURITY AND CONVERGENCE
• PURITY adjustment
• STATIC CONVERGENCE adjustment
• DYNAMIC CONVERGENCE adjustment