Adjustments - JVC AV-48WP74/AHA Service Manual

3.1 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:
• SETTING POSITION
Setting item
VIDEO STATUS
BASS / TREBLE / BALANCE
HYPER SURROUND
TINT / COLOR / PICTURE /
BRIGHT / DETAIL
COLOR TEMPERATURE
DIGITAL NOISE CLEAR
3.3 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
CONVERGENCE
(match to unreplaced tube)
HIGH LIGHT
SECTION 3

ADJUSTMENTS

Setting position
STANDARD
Center
OFF
Center
HIGH
OFF
3 Projection unit
Install projection tube
LENS FOCUS
SCREEN & LOW LIGHT
G CONVERGENCE
R CONVERGENCE
B CONVERGENCE
END
HIGH LIGHT
3.2 ADJUSTMENT EQUIPMENT
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) Signal generator (Pattern generator)
[NTSC / 480i / 480p / 720p / 1080i / HDCP]
(4) TV audio multiplex signal generator
(5) Remote control unit
Setting item
ASPECT
VERTICAL POSITION
BBE
ON/OFF TIMER
AUTO SHUTOFF
BEAM SPOT
CRT FOCUS
END
Setting position
FULL
Center
ON
NO
OFF
SCREEN
LENS FOCUS
G convergence
N
disturbed
Y
G CONVERGENCE
R CONVERGENCE
B CONVERGENCE
END
(No.52105)1-21
AV-48WP74
AV-56WP74