Adjustment - JVC AV-56P776 Service Manual

4.1 ADJUSTMENT PREPARATION
(1) You can make the necessary adjustments for this unit with
either the Remote Control Unit or with the adjustment tools
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 which set 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 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 setting value which are not
specified in the list for this adjustment.
(7) Presetting before adjustment
Unless otherwise specified in the adjustment instructions,
preset the following functions with the remote control unit.
4.2 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) Signal generator (Pattern generator)
[NTSC / 480i / 480p / 720p / 1080i]
(4) TV audio multiplex signal generator
(5) Remote control unit
4.3 ADJUSTMENT FLOWCHART
WHEN REPLACING SCREEN AND PROJECTION UNIT
• Contains only the main adjustments. Also confirm other adjustments as required.
1 Projection unit
Install projection tube
LENS FOCUS
BEAM SPOT
CRT FOCUS
SCREEN & LOW LIGHT
DEFLECTION
CONVERGENCE
(match to unreplaced tube)

ADJUSTMENT

3 Projection unit
SCREEN & LOW LIGHT
HIGH LIGHT
END
SECTION 4
SETTING POSITION
Setting item
VIDEO STATUS
TINT / COLOR / PICTURE /
BRIGHT / DETAIL
COLOR TEMPERATURE
DIG. NOISE CLEAR
NATURAL CINEMA
VSM (Velocity Scan Modulation)
BASS / TREBLE / BALANCE
ASPECT
VERTICAL POSITION
ON/OFF TIMER
AUTO SHUTOFF
Install projection tube
LENS FOCUS
BEAM SPOT
CRT FOCUS
DEFLECTION
G CONVERGENCE
R CONVERGENCE
B CONVERGENCE
HIGH LIGHT
END
Setting position
STANDARD
00 (Center)
LOW
OFF
AUTO
OFF
00 (Center)
FULL
Center
OFF
OFF
SCREEN
LENS FOCUS
G convergence
disturbed
N
Y
G CONVERGENCE
R CONVERGENCE
B CONVERGENCE
END
(No.YA318)1-19