JVC AV-2955VE, Service Manual

Page: 7 / 59

1-12 (No.YA280)
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT PREPARATION
(1) You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment
equipment and parts as given below.
(2) Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting
values used for setting the screen to its optimum condition may differ from the initial settings.
(3) Make sure that AC power is turned on correctly.
(4) Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30
minutes.
(5) Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
(6) Never touch any adjustment parts, which are not specified in the list for this variable resistors, transformers, trimmer capacitors,
etc.
4.2 PRESETTING BEFORE ADJUSTMENT
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
„ User mode setting position
4.3 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or Digital voltmeter)
(2) Oscilloscope
(3) Signal generator (Pattern generator) [PAL/SECAM/NTSC]
(4) Remote control unit
4.4 ADJUSTMENT ITEMS
„ B1 VOLTAGE
„ FOCUS ADJUSTMENT
„ IF CIRCUIT ADJUSTMENTS
• IF VCO adjustment
• DELAY POINT (AGC TAKE-OVER) adjustment
„ VIDEO CIRCUIT ADJUSTMENTS
• WHITE BALANCE (Low light) adjustment
• WHITE BALANCE (High light) adjustment
• SUB BRIGHT adjustment
• SUB CONTRAST adjustment
• SUB COLOUR 1 adjustment
• SUB COLOUR 2 adjustment
• SUB TINT 1 adjustment
• SUB TINT 2 adjustment
„ AUDIO SETTING
„ DEFLECTION CIRCUIT ADJUSTMENTS
• V.SLOPE adjustment
• V.POSITION adjustment
• V.HEIGHT adjustment
• H.POSITION adjustment
• H.WIDTH adjustment
• SIDE PIN adjustment
• TRAPEZIUM adjustment
• V. LINEARITY adjustment
• CORNER adjustment
• H. PARALLEL adjustment
• H.BOW adjustment
„ VSM PRESET SETTING
„ PURITY AND CONVERGENCE ADJUSTMENTS
• PURITY adjustment
• STATIC CONVERGENCE adjustment
• DYNAMIC CONVERGENCE adjustment
Setting item Setting value
PICTURE MODE (VSM) BRIGHT
VNR OFF
AI ECO SENSOR OFF
BALANCE Centre
CINEMA SURROUND OFF
COMPRESS (16:9) OFF