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Service Adjustments - JVC AV-28BT8ENS Service Manual

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SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION
1. You can make the necessary adjustments for this unit with
either the Remote Control Unit or With the adju stment tools
and par ts as given below.
2. Ad justment 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 c orrec tly.
4. Turn on the power for s et and test equipment before use, and
start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise s pec ified, prepare the most suitable reception
or input signal for adjustment.
ADJUSTMENT EQUIPMENT
1. DC voltmeter (or digital voltmeter)
2. Signal generator (Pattern generator) [PAL/SECAM/NTSC]
3. Remote control unit
MAIN PARTS LOCATIONS
HEADPHONE J ACK
FRONT
VIDEO R
AUDIO.
FRONT AV & HEADPHONE PWB
MEMORY IC
TUNER
L
LED REMOCON
RECEIVER
IC502
IC501
MICOM
SCART
SCART
jack
jack
AV-1
AV-2
AV-28BT8ENS / AV-28BT8ENB / AV-28BT80EN
AV-28BT8EPS / AV-28BT8EPB / AV-28BT80EP
AV-28BT8EES / AV-28BT8EEB/ AV-28BS88EN
6. Never touch any adjustment parts whic h are not specified in the
list for this adjustment - variable resistors, transformers,
condensers, etc.
7. Pres etting before adjustment.
Unless otherwise spec ified in the adjustment instructions, preset
the following functions with the remote c ontrol unit.
BRIGHTNESS
CONTRAST
COLOUR
SHARPNESS
ADJUSTMENT ITEM
!
SCREEN ADJUST MENT
!
OSD HORIZONTAL POSITION ADJ USTMENT
!
IF ADJUSTMENT
!
AGC AUTOMATICALLY ADJUSTMENT
!
DEFLECTION CIRCUIT ADJUSTMENT
!
GEOMET RY MENU ADJUSTMENT
!
WHITE BALANCE ADJUSTMENT
MENU
(+) (-)
(+)
(+)
(+)
FRONT CONTRO L PWB
MAIN PWB
No. 52057
CENTER
(-)
(+)
(+) (-)
(-)
(-)
(-)
(+)
(+)
(-)
(-)
PROG
VOL
/Ch.
FBT
UPPER : FOCUS VR
LOWER : SCREEN VR
TOP
FRONT
11

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