JVC AV28R100EKS, Service Manual

Page: 45 / 93

No. 51754
AV-29RF6
13
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 ways of adjusting this TV: One is with the
REMOTE CONTROL UNIT and the other is the conventional
method using adjustment parts and components.
2. The adjustment with the REMOTE CONTROL UNIT is made
on the basis of the initial setting values. The setting values
which adjust the screen to its optimum condition may differ
from the initial setting values.
3. Make sure that connection is correctly made to AC power
source.
4. Turn on the power of the set and 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, transforms, condensers,
etc.
7. Preparation for adjustment (presetting)
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
User mode setting condition
PICTURE MODE (VSM) STANDARD
WHITE BALANCE COOL
ZOOM REGULAR
CONTRAST CENTER
BRIGHT CENTER
SHARP CENTER
COLOUR CENTER
A.A.C OFF
AUTO VNR OFF
PICTURE TILT CENTER
BLUE BACK OFF
AUTO SHUTOFF OFF
ECO SENSOR OFF
AI VOLUME OFF
BBE OFF
SLEEP TIMER OFF
BALANCE CENTER
SPATIALIZER OFF
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL / SECAM / NTSC]
4. Remote control unit
ADJUSTMENT CONTENTS
●
CHECK ITEMS BEFORE ADJUSTMENT
●
FOCUS ADJUSTMENT
●
CHECK OF IF CIRCUIT
●
SETTING OF VSM PRESET
●
SETTING OF WHITE BALANCE PRESET
●
VIDEO / CHROMA CIRCUIT ADJUSTMENT
●
DEFLECTION CIRCUIT ADJUSTMENT
●
AUDIO CIRCUIT ADJUSTMENT [Do not adjust]
●
PURITY, CONVERGENCE ADJUSTMENT