Adjustment - JVC AV-28ED5BN 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 parts which are not specified
in the list for this adjustment - variable resistors,
transformers, condensers, etc.
(7) Presetting before adjustment.
Unless otherwise specified in the adjustment instructions,
preset the following functions with the remote control unit:
4.4 ADJUSTMENT LOCATIONS
HEADPHONE
MENU
P/Ch
SIDE CONTROL PWB
SECTION 4

ADJUSTMENT

VIDEO
TUNER FEATURE BOX PWB
TU200
Setting item
BRIGHTNESS
CONTRAST
COLOUR
SHARPNESS
COLOUR TEMP
ZOOM
4.2 MEASURING EQUIPMENT
(1) DC voltmeter (or digital voltmeter)
(2) Signal generator (Pattern generator)
: [PAL / SECAM / NTSC]
(3) Remote control unit
4.3 ADJUSTMENT ITEM
• FOCUS ADJUSTMENT
• SCREEN ADJUSTMENT
• AGC ADJUSTMENT
• DEFLECTION CIRCUIT ADJUSTMENT
• VIDEO CIRCUIT ADJUSTMENT
IC720 (MEMORY)
IC721 (MI-COM)
PL424
PL423
Setting value
Centre
NORMAL
AUTO
MAIN PWB
FBT
UPPER : FOCUS
LOWER : SCREEN
(No.YA316)1-9