AV-21L31
AV-25L31
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, BALANCECENTER
TINT,COLOR,BRIGHT,PICTURE,DETAILCENTER
MEASURING INSTRUMENT
1. DC voltmeter (or Digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
YB1 POWER SUPPLYAdjustment of H. WIDTH
YFOCUS ADJUSTMENTAdjustment of SIDE PIN
IF CIRCUIT ADJUSTMENTS
YAdjustment of TRAPEZIUM
Adjustment of VCO (CW)Adjustment of V. S-CURVE
Adjustment of DELAY POINT (AGC TAKE-OVER)Adjustment of CORNER
YVC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTSAdjustment of H. PARALLEL
Adjustment of WHITE BALANCE (Low light)Adjustment of H. BOW
Adjustment of WHITE BALANCE (High light)Adjustment of V. HEIGHT
Adjustment of SUB BRIGHTAdjustment of SIDE PIN
Adjustment of SUB CONTRASTAdjustment of CORNER
Adjustment of SUB COLOR-?Adjustment of H. POSITION
Adjustment of SUB COLOR-??VSM PRESET SETTING
Y
Adjustment of SUB TINT-?PRESET SETTING
Y
Adjustment of SUB TINT-??YAUDIO ADJUSTMENT
YDEFLECTION CIRCUIT ADJUSTMENTSYPURITY ADJUSTMENT
Adjustment of V. SLOPEYCONVERGENCE ADJUSTMENTS
Adjustment of V. POSITIONAdjustment of STATIC CONVERGENCE
Adjustment of V. HEIGHTAdjustment of DYNAMIC CONVERGENCE
Adjustment of H. POSITION
14No. 51908 |
ACEC
