AV-20N83
AV-21D83
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment 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 the 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, capacitors, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
Y User mode setting position
Setting itemSetting value
PICTURE MODE(VSM)BRIGHT
VNROFF
BASS, TREBLE, BALANCECENTRE
TINT, COLOUR, BRIGHT, SHARPCENTRE
CONTRASTMAXIMUM
MEASURING INSTRUMENT
1. DC voltmeter (or Digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL/SECAM/NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
DEFLECTION CIRCUIT ADJUSTMENTS
YB1 POWER SUPPLYY
FOCUS ADJUSTMENTAdjustment of V. SLOPE
Y
Adjustment of V. POSITION
YIF CIRCUIT ADJUSTMENTS
Adjustment of VCO (CW)Adjustment of V. HEIGHT
Adjustment of DELAY POINT (AGC TAKE-OVER)Adjustment of H. POSITION
YVC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTSAdjustment of H. WIDTH
Adjustment of WHITE BALANCE (Low light)Adjustment of SIDE PIN
Adjustment of WHITE BALANCE (High light)Adjustment of TRAPEZIUM
Adjustment of SUB BRIGHTAdjustment of V. S-CURVE
Adjustment of SUB CONTRASTAdjustment of CORNER
Adjustment of SUB COLOUR-?Adjustment of H. PARALLEL
Adjustment of SUB COLOUR-??Adjustment of H. BOW
Adjustment of SUB TINT-?YVSM PRESET SETTING
Adjustment of SUB TINT-??YPRESET SETTING
YPURITY ADJUSTMENT
YCONVERGENCE ADJUSTMENTS
Adjustment of STATIC CONVERGENCE
Adjustment of DYNAMIC CONVERGENCE
16No. 52076 |
ACEC
